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Septic companies in Spokane, WA

5 septic companies on record in Spokane, Spokane County.

Companies
5
County
Spokane

What the ground in Spokane is like

The USDA soil survey rates every mapped parcel for its suitability as a septic drain field. Across Spokane's 68.8 square miles, 99.6% of the rated ground is classed "Very limited", meaning restrictions severe enough that a conventional field is often unsuitable and an engineered system may be required.

The limiting features the survey records most often here:

  • Seepage, bottom layer82.0%
  • Filtering capacity40.1%
  • Slow water movement24.7%
  • Depth to bedrock18.6%

The most common soil series underfoot: Opportunity, Marble, Northstar.

This is survey data for the area, not a substitute for a site evaluation on your own lot. A soil scientist or your county health department tests the actual parcel, and the result can differ from the map.

USDA NRCS SSURGO, ENG Septic Tank Absorption Fields · 114 map units · read 2026-08-30

Septic companies in Spokane

Ordered by verification score. The score counts records we could check and is not a judgment about workmanship. None of these has been checked against a state roster yet, so every licence here reads as unverified.

  • 25Shaw Plumbing Heating & Air ConditioningLicence unverified+15096426166
  • 25Septic System DesignLicence unverified+15099936568
  • 10Tri-County Septic And Grease Trap SolutionsLicence unverified+15099269361
  • 10Affordable DrainsLicence unverified+15096837246
  • 10Spokane Septic ServicesLicence unverified+15099709118

Nearby

All septic companies in Washington · Spokane County

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 here and none can pay to rank higher.