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State guide

Septic companies in Oklahoma

Oklahoma runs septic from the state. DEQ holds the jurisdiction, sells the Authorization to Construct, and assigns it to its own Environmental Specialist for your area. We found no county permitting role alongside it. This guide covers that, why certification for an installer is about self inspection rather than permission to work, the soil professional you hire before the installer, and the one-system-a-year limit that changed in November 2025.

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Who Regulates Septic Systems in Oklahoma

Sources: Oklahoma State Senate; Oklahoma Department of Environmental Quality. Checked 2026-09-18.

Oklahoma runs septic from the state. The Department of Environmental Quality holds the jurisdiction and sells the authorisation, and we found no county permitting role alongside it. The person who then handles your job is DEQ's own specialist for your area.

The statute puts water, waste and wastewater treatment systems including septic tanks and other private waste disposal systems under DEQ opens in a new tab, and Chapter 252:641 establishes the requirements for the design and construction of individual and small public on-site sewage treatment systems opens in a new tab. That chapter number is what a contractor is citing when they say 641.

Local means a state employee near you rather than a county office. After the Authorization to Construct is purchased it is assigned to the local DEQ Environmental Specialist based on the location of the property opens in a new tab. No individual sewage treatment system shall be constructed or operated except in compliance opens in a new tab.

Licenses and What to Check Before You Hire

Sources: Oklahoma Department of Environmental Quality; Oklahoma State Department of Health; Oklahoma State Senate. Checked 2026-09-18.

Oklahoma uses two different words for the two trades, and it uses them deliberately: the installer is certified and the pumper is licensed. They are not the same instrument, and the difference tells you what each one had to do to get it.

The surprise is what certification actually buys. The Environmental Complaints and Local Services Division has administered the Certified Installer Program since 1994 opens in a new tab, and certification is what lets an installer sign off their own work rather than wait for DEQ. An individual who is not certified by DEQ may install one on-site sewage system per calendar year opens in a new tab.

That limit changed recently, so an older article may tell you the wrong number. The Oklahoma On-Site Wastewater Association ran Senate Bill 111 to amend the statute opens in a new tab, and the threshold moved from ten systems a year to one. Ask when your installer last checked the rule.

Pumping is a licence, and it is annual. Any person operating a business that pumps, transports or disposes of septage shall obtain an annual licence opens in a new tab, and separately any person employed by a licensed business who operates one of those vehicles needs their own certification opens in a new tab. Two instruments, one for the firm and one for the driver.

The soil work is a separate hire, and it comes before the installer. Soil tests may only be performed by Professional Engineers, Professional Land Surveyors, Professional Sanitarians or Professional Environmental Specialists opens in a new tab, and a certified soil profiler must already hold one of those professional credentials opens in a new tab. DEQ trains and certifies individuals to perform those soil profile tests opens in a new tab.

One related test belongs to a different agency entirely. Percolation tests may only be performed by individuals registered through the Department of Health opens in a new tab, which issues the Registered Professional Sanitarian and Registered Professional Environmental Specialist registrations opens in a new tab. We hold no Oklahoma register of our own, so no listing here carries a verified credential for this state, and the statute sets out who may certify a soil profile description opens in a new tab.

Permits, Inspections and Selling a Home

Sources: Oklahoma Department of Environmental Quality; Oklahoma Real Estate Commission; Oklahoma State Senate. Checked 2026-09-18.

The order of operations in Oklahoma is soil test, then authorisation, then installer. Before installing a new system or modifying an existing one, an Authorization to Construct must be obtained opens in a new tab, and the Report for On-Site Sewage, commonly called the 581, determines what types of system are allowed for the property opens in a new tab.

The job closes one of two ways, which is where certification matters again. All new installations or modifications must be inspected and approved by DEQ, or installed and signed off under the certified installer route opens in a new tab. Ask which applies to your job, because it changes the timetable.

On selling, we found no Oklahoma rule requiring a septic inspection. The state works through the seller's disclosure instead. Oklahoma law requires sellers of residential property to complete the disclosure form opens in a new tab, which asks specifically about the sewer, septic, lateral lines and aerobic system.

Two statutory details are worth knowing at a purchase. The county clerk shall not record a plat containing any lot of less than two and a half acres outside municipal limits without DEQ approval opens in a new tab, and DEQ shall not require a departmental inspection of an existing system before a connection to a public water supply opens in a new tab.

Keeping a System Working

Sources: Oklahoma Department of Environmental Quality; U.S. Environmental Protection Agency. Checked 2026-09-18.

Oklahoma gives you a depth rather than a date: the tank should be pumped when the sludge depth reaches 40 percent of the tank depth, or about 25 inches opens in a new tab, and DEQ's advice is to inspect the tank annually because malfunctioning systems are often expensive to repair opens in a new tab, against the EPA's inspection at least every three years opens in a new tab. An aerobic system comes with service built in: the installer of any aerobic treatment system shall maintain it opens in a new tab for the first two years.

Help Paying for Repairs

Sources: Oklahoma Department of Environmental Quality; Oklahoma Water Resources Board; Oklahoma Conservation Commission; U.S. Environmental Protection Agency. Checked 2026-09-18.

Oklahoma's own help is mostly a reduction in what the state charges you rather than a grant toward the work. DEQ may waive fees for indigents and nonprofit organisations, on a request decided by the division director opens in a new tab, and DEQ may perform a soil profile description at no charge as part of an investigation of a system known to be malfunctioning or the subject of a complaint opens in a new tab.

There is a second saving built into the rules for aerobic owners. The installer of an aerobic treatment system, including one providing nitrogen reduction, must maintain it for the initial period at no additional cost to the owner opens in a new tab, so that servicing is already bought and paid for in the installation price.

The larger state money goes to communities rather than households. REAP gives priority consideration to cities, towns and municipalities with populations under 1,750 and to rural water districts opens in a new tab, and the Conservation Commission's work involves assisting landowners with best management practices opens in a new tab. One federal route can put a revolving loan fund in the hands of a nonprofit serving owner occupiers in a rural area opens in a new tab.

Find Your DEQ Area Office

Oklahoma septic authorisations come from DEQ and are assigned to the local DEQ Environmental Specialist for the property. Each entry below shows the office that covers that county. Checked 2026-09-18.

CountyEnvironmental health office
AtokaOklahoma Department of Environmental Quality (DEQ) - McAlester DEQ Office (on-site sewage / septic authorisation) opens in a new tabMcAlester DEQ Office is at 1010 N Main, McAlester, OK 74501-5410. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Atoka County page
BryanOklahoma Department of Environmental Quality (DEQ) - Durant DEQ Office (on-site sewage / septic authorisation) opens in a new tabDurant DEQ Office is at 202 N 16th St, Durant, OK 74701-3347. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Bryan County page
CaddoOklahoma Department of Environmental Quality (DEQ) - Clinton DEQ Office (on-site sewage / septic authorisation) opens in a new tabClinton DEQ Office is at 605 Frisco Ave, Clinton, OK 73601. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Caddo County page
CanadianOklahoma Department of Environmental Quality (DEQ) - Oklahoma City DEQ Office (on-site sewage / septic authorisation) opens in a new tabOklahoma City DEQ Office is at 707 N Robinson Ave, Oklahoma City, OK 73101-1677. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Canadian County page
CarterOklahoma Department of Environmental Quality (DEQ) - Ardmore DEQ Office and Duncan DEQ Office opens in a new tabCarter County is split between DEQ offices: Ardmore DEQ Office (18407 Scenic State Highway 77, Ardmore) covers about 56 percent of the county, the east side; Duncan DEQ Office (1309 W Ash Ave Suite 104, Duncan) covers about 44 percent of the county, the west side. Those shares are area estimates from a 500 metre sample grid over the county polygon, not a DEQ published figure; the authorisation is assigned by property location, so confirm which specialist covers the site. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Carter County page
CherokeeOklahoma Department of Environmental Quality (DEQ) - Tahlequah DEQ Office (on-site sewage / septic authorisation) opens in a new tabTahlequah DEQ Office is at 918 W. Choctaw St., Ste. 5, Tahlequah, OK 74464. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Cherokee County page
ClevelandOklahoma Department of Environmental Quality (DEQ) - Purcell DEQ Office and Oklahoma City DEQ Office opens in a new tabCleveland County is split between DEQ offices: Purcell DEQ Office (302 West Main St Suite 107, Purcell) covers about 70 percent of the county, the south side; Oklahoma City DEQ Office (707 N Robinson Ave, Oklahoma City) covers about 30 percent of the county, the north side. Those shares are area estimates from a 500 metre sample grid over the county polygon, not a DEQ published figure; the authorisation is assigned by property location, so confirm which specialist covers the site. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Cleveland County page
CreekOklahoma Department of Environmental Quality (DEQ) - Tulsa DEQ Office (on-site sewage / septic authorisation) opens in a new tabTulsa DEQ Office is at 9933 E 16th St S, Tulsa, OK 74128-4643. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Creek County page
DelawareOklahoma Department of Environmental Quality (DEQ) - Grove DEQ Office (on-site sewage / septic authorisation) opens in a new tabGrove DEQ Office is at 2096 S Main St, Grove, OK 74344-5325. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Delaware County page
GarfieldOklahoma Department of Environmental Quality (DEQ) - Enid DEQ Office (on-site sewage / septic authorisation) opens in a new tab · Garfield County page
GradyOklahoma Department of Environmental Quality (DEQ) - Duncan DEQ Office and Purcell DEQ Office opens in a new tabGrady County is split between DEQ offices: Duncan DEQ Office (1309 W Ash Ave Suite 104, Duncan) covers about 52 percent of the county, the south side; Purcell DEQ Office (302 West Main St Suite 107, Purcell) covers about 48 percent of the county, the north side. Those shares are area estimates from a 500 metre sample grid over the county polygon, not a DEQ published figure; the authorisation is assigned by property location, so confirm which specialist covers the site. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Grady County page
Le FloreOklahoma Department of Environmental Quality (DEQ) - Sallisaw DEQ Office (on-site sewage / septic authorisation) opens in a new tabSallisaw DEQ Office is at 2608 S Kerr Blvd, Sallisaw, OK 74955-7063. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Le Flore County page
LincolnOklahoma Department of Environmental Quality (DEQ) - Tecumseh DEQ Office (on-site sewage / septic authorisation) opens in a new tabTecumseh DEQ Office is at 19905 Gordon Cooper Dr, Tecumseh, OK 74873-9116. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Lincoln County page
LoganOklahoma Department of Environmental Quality (DEQ) - Oklahoma City DEQ Office and Stillwater DEQ Office opens in a new tabLogan County is split between DEQ offices: Oklahoma City DEQ Office (707 N Robinson Ave, Oklahoma City) covers about 85 percent of the county, the south side; Stillwater DEQ Office (2600 S Main St Suite B1, Stillwater) covers about 15 percent of the county, the north side. Those shares are area estimates from a 500 metre sample grid over the county polygon, not a DEQ published figure; the authorisation is assigned by property location, so confirm which specialist covers the site. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Logan County page
McClainOklahoma Department of Environmental Quality (DEQ) - Purcell DEQ Office (on-site sewage / septic authorisation) opens in a new tabPurcell DEQ Office is at 302 West Main St Suite 107, Purcell, OK 73080-4200. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · McClain County page
MuskogeeOklahoma Department of Environmental Quality (DEQ) - Tahlequah DEQ Office (on-site sewage / septic authorisation) opens in a new tabTahlequah DEQ Office is at 918 W. Choctaw St., Ste. 5, Tahlequah, OK 74464. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Muskogee County page
OklahomaOklahoma Department of Environmental Quality (DEQ) - Oklahoma City DEQ Office (on-site sewage / septic authorisation) opens in a new tabOklahoma City DEQ Office is at 707 N Robinson Ave, Oklahoma City, OK 73101-1677. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Oklahoma County page
OkmulgeeOklahoma Department of Environmental Quality (DEQ) - Dewar DEQ Office (on-site sewage / septic authorisation) opens in a new tabDewar DEQ Office is at 107 N Broadway St, Dewar, OK 74431. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Okmulgee County page
OsageOklahoma Department of Environmental Quality (DEQ) - Bartlesville DEQ Office (on-site sewage / septic authorisation) opens in a new tabOsage County is split between DEQ offices: Bartlesville DEQ Office (401 S Dewey, Suite 310, Bartlesville) covers about 92 percent of the county, the east side; Stillwater DEQ Office (2600 S Main St Suite B1, Stillwater) covers about 8 percent of the county, the west side. Those shares are area estimates from a 500 metre sample grid over the county polygon, not a DEQ published figure; the authorisation is assigned by property location, so confirm which specialist covers the site. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Osage County page
PayneOklahoma Department of Environmental Quality (DEQ) - Stillwater DEQ Office (on-site sewage / septic authorisation) opens in a new tabStillwater DEQ Office is at 2600 S Main St Suite B1, Stillwater, OK 74074-7148. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Payne County page
PittsburgOklahoma Department of Environmental Quality (DEQ) - McAlester DEQ Office (on-site sewage / septic authorisation) opens in a new tabMcAlester DEQ Office is at 1010 N Main, McAlester, OK 74501-5410. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Pittsburg County page
PottawatomieOklahoma Department of Environmental Quality (DEQ) - Tecumseh DEQ Office and Purcell DEQ Office opens in a new tabPottawatomie County is split between DEQ offices: Tecumseh DEQ Office (19905 Gordon Cooper Dr, Tecumseh) covers about 51 percent of the county, the north side; Purcell DEQ Office (302 West Main St Suite 107, Purcell) covers about 49 percent of the county, the south side. Those shares are area estimates from a 500 metre sample grid over the county polygon, not a DEQ published figure; the authorisation is assigned by property location, so confirm which specialist covers the site. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Pottawatomie County page
RogersOklahoma Department of Environmental Quality (DEQ) - Tulsa DEQ Office (on-site sewage / septic authorisation) opens in a new tabTulsa DEQ Office is at 9933 E 16th St S, Tulsa, OK 74128-4643. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Rogers County page
TulsaOklahoma Department of Environmental Quality (DEQ) - Tulsa DEQ Office and Bartlesville DEQ Office opens in a new tabTulsa County is split between DEQ offices: Tulsa DEQ Office (9933 E 16th St S, Tulsa) covers about 78 percent of the county, the south side; Bartlesville DEQ Office (401 S Dewey, Suite 310, Bartlesville) covers about 22 percent of the county, the north side. Those shares are area estimates from a 500 metre sample grid over the county polygon, not a DEQ published figure; the authorisation is assigned by property location, so confirm which specialist covers the site. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Tulsa County page
WagonerOklahoma Department of Environmental Quality (DEQ) - Tulsa DEQ Office (on-site sewage / septic authorisation) opens in a new tabTulsa DEQ Office is at 9933 E 16th St S, Tulsa, OK 74128-4643. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Wagoner County page
WashingtonOklahoma Department of Environmental Quality (DEQ) - Bartlesville DEQ Office (on-site sewage / septic authorisation) opens in a new tabBartlesville DEQ Office is at 401 S Dewey, Suite 310, Bartlesville, OK 74003. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Washington County page
WashitaOklahoma Department of Environmental Quality (DEQ) - Clinton DEQ Office (on-site sewage / septic authorisation) opens in a new tabClinton DEQ Office is at 605 Frisco Ave, Clinton, OK 73601. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Washita County page
WoodwardOklahoma Department of Environmental Quality (DEQ) - Woodward DEQ Office (on-site sewage / septic authorisation) opens in a new tabWoodward DEQ Office is at 2411 Williams Ave., Ste 116, Woodward, OK 73801. DEQ, not the county, issues the Oklahoma septic authorisation: the source research looked for a county or municipal permitting role and found none, so the office named here is the DEQ field office that covers the county rather than a county health department. The county to office coverage is taken from DEQ's own map, Environmental Specialist Coverage Areas, embedded at https://oklahoma.gov/deq/about/deq-offices.html; its one visible assignment layer, ES Territory Assignments at https://services1.arcgis.com/ITtWh5MaoQucXt9D/arcgis/rest/services/ES_Territory_Assignments/FeatureServer/0, holds 67 territory polygons that each name their DEQ office and specialist, and the 77 county polygons from DEQ's own County service were overlaid on it to produce these rows. That map renders entirely inside an ArcGIS viewer and its page carries no body prose, so the gate quote is body text from DEQ's statewide Sewage Treatment page instead. Office name, street address and the roster of specialists come from DEQ's Office Locations layer behind the same map. For the specialist assigned to a specific property, call DEQ at (405) 702-6100, the number that page gives for your local DEQ representative; DEQ also publishes a specialist contact list at https://oklahoma.gov/deq/divisions/ecls/deq-environmental-specialist-contact-list.html. · Woodward County page

Questions People Ask

Who issues my septic permit in Oklahoma?

DEQ, and it is called an Authorization to Construct rather than a permit. Once you buy it, it is assigned to the local DEQ Environmental Specialist for where your property is. There is no separate county permit.

Does my installer have to be certified?

Not to install, but certification is what lets them inspect their own work instead of waiting for DEQ. Someone who is not certified may install one system per calendar year. That limit used to be ten and was changed by Senate Bill 111, so check anything written before then.

Who does the soil test?

A separate professional you hire before the installer. Soil tests may only be performed by Professional Engineers, Professional Land Surveyors, Professional Sanitarians or Professional Environmental Specialists, and a DEQ certified soil profiler has to already be one of those. Percolation tests are different again and need someone registered through the Department of Health.

Is the pumping company licensed?

Yes, annually. A business that pumps, transports or disposes of septage needs an annual licence from DEQ, and each driver operating one of those vehicles holds a separate certification.

Do I need an inspection to sell?

We found no Oklahoma rule requiring one. The state works through the seller's residential property condition disclosure form, which asks about the sewer, septic, lateral lines and aerobic system.

Sources

Cities in Oklahoma

Counties in Oklahoma

How these are ranked

By verification score, out of 100, across six checks published in full on how we rank. No company paid to appear and none can pay to rank higher. The score counts records and is not a judgment about workmanship.