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State guide

Septic companies in South Dakota

South Dakota writes the septic standards at state level and then steps out of the way for an ordinary house. The state's own instruction is to contact it before any new system except a conventional one serving a single residence, which leaves your county planning office as the practical authority. This guide covers that split, the installer certification that is examined by the Plumbing Commission rather than the environment department, and the two places your pumper may lawfully take the load.

Companies
37
Counties
24
With Google reviews
12

Who Regulates Septic Systems in South Dakota

Sources: South Dakota Department of Agriculture and Natural Resources. Checked 2026-09-21.

South Dakota sets the standards at state level and then leaves the ordinary house to the county. The rules are a floor rather than a permit counter, and the practical authority for a single family system is county planning and zoning. That is not obvious from the state website, which is worth knowing before you spend a morning on the phone.

The authority for the onsite wastewater and installer certification rules is South Dakota Codified Law 34A-2 opens in a new tab, and the regulations themselves sit in the Administrative Rules of South Dakota, chapter 74:53:01 opens in a new tab. Those are design standards, and they are the reason a county can be stricter but not looser.

The state's own instruction is the part that matters. You should contact the department prior to the installation of any new onsite system except those that are conventional systems serving an individual residence opens in a new tab, and the regulations are the state's minimum requirements, with local governments free to be more stringent and local requirements found through county government or the local planning and zoning agency opens in a new tab. For a normal house, the county is the office you want.

Licenses and What to Check Before You Hire

Sources: South Dakota Department of Agriculture and Natural Resources. Checked 2026-09-21.

Certification here is real, and the exam is not where you would look for it. All persons who intend to install individual and small wastewater systems must be certified by the state opens in a new tab, and the written test is administered by the South Dakota Plumbing Commission opens in a new tab. Ask for the certification, and ask who examined them.

Checking it is harder than it ought to be. The department no longer maintains a list of septic installers who are certified to perform work in South Dakota opens in a new tab, and it points the public to the Plumbing Commission instead. We hold no South Dakota register of our own, so no listing on this site carries a verified credential for this state.

Scale is why this matters more here than in a city state. Approximately 25% of South Dakota residents rely on onsite wastewater systems for their wastewater treatment opens in a new tab, so a bad install is a common problem rather than an exotic one. The county permit and its inspection are the check that catches one.

Permits, Inspections and Selling a Home

Sources: South Dakota Department of Agriculture and Natural Resources. Checked 2026-09-21.

We found no statewide South Dakota inspection requirement at the point of sale, so the paperwork you want is local. Local requirements are found by contacting county government or the local planning and zoning agency opens in a new tab, and that is where a permit history for your address will sit. Ask for the file by legal description as well as by street address.

For anything out of the ordinary the state does get involved. The department asks to be contacted before the installation of any new onsite system except a conventional one serving an individual residence opens in a new tab, so an alternative or shared system means a state conversation. If a seller says their system is unusual, ask which review it went through.

On a recent install, certification is the thing to check. Anyone installing an individual or small wastewater system has to be certified by the state opens in a new tab, so a receipt from an uncertified digger is a warning rather than a record. Ask who installed it and in which year.

Keeping a System Working

Sources: South Dakota Department of Agriculture and Natural Resources; U.S. Environmental Protection Agency. Checked 2026-09-21.

South Dakota gives your pumper two lawful destinations: a municipal or private wastewater treatment facility, or beneficial reuse by land application at a non-public contact site opens in a new tab. The EPA's guidance is an inspection at least every three years, with household tanks typically pumped every three to five opens in a new tab.

Help Paying for Repairs

Sources: South Dakota Department of Agriculture and Natural Resources; U.S. Environmental Protection Agency. Checked 2026-09-21.

South Dakota's own effort here is rules and certification rather than cash, and we found no state fund a household can apply to for a septic repair. The state's authority in this area is the onsite wastewater and installer certification law at South Dakota Codified Law 34A-2 opens in a new tab, which is a standards mandate and not a grant programme. Ask your county whether anything local exists, because that is where the exceptions turn up.

The route that reaches a household is federal. The USDA runs grants and low-interest loans to repair, improve or modernize rural single-family homes opens in a new tab, and this is a state where almost every septic address qualifies as rural. Start at the local USDA Rural Development office rather than at a bank.

Find Your County's Septic Office

South Dakota's own guidance sends you to the county: the state rules are a minimum standard, and local governments may be stricter, with local requirements found by contacting county government or the local planning and zoning agency. That makes the county planning and zoning office the place to start for a single family system. We could not verify a county page for this state this session, and the counties below are recorded with the reason rather than filled in with a guess. Checked 2026-09-21.

Questions People Ask

Who issues a septic permit in South Dakota?

Usually your county. The state's regulations are minimum requirements and local governments may be more stringent, with local requirements found by contacting county government or the local planning and zoning agency. The state asks to be contacted only for a new system that is not a conventional one serving an individual residence.

Is my installer certified?

They are required to be. Anyone installing individual and small wastewater systems must be certified by the state, and the written test is administered by the South Dakota Plumbing Commission. Checking is awkward, because the environment department no longer maintains a list of certified installers and refers the public to the Plumbing Commission.

Do I have to tell the state about a new system?

Not for an ordinary house. The department asks to be contacted before installing any new onsite system except a conventional system serving an individual residence. The design still has to meet the state rules in chapter 74:53:01.

Where does my pumper take the waste?

One of two places. Domestic septage may go to a municipal or private wastewater treatment facility, or be land applied at a non-public contact site such as an agricultural field, forest or mining reclamation site. Ask your pumper which route they use, because it is on their paperwork.

Is there money to help pay for a repair?

Nothing state-level that we could find. South Dakota's role here is standards and installer certification under state law, not grants. The practical route is federal, through USDA grants and low-interest loans for repairing rural single-family homes.

Sources

Cities in South Dakota

Counties in South Dakota

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.