GroundRosterLicensed Septic Contractors: Clark County, WA
12 licensed septic contractors based in Clark County. Every license number below is sourced from public licensing records, with a link to look it up yourself.
Grouped by the county of the address on each license record, which can be a mailing address, so it doesn't tell you where the business works. When the record names no county, we place it by ZIP code, then town.
Checked against Washington State Dept. of Health - Credential Search. Roster copy last refreshed 2026-08-17.
Towns in Clark County
All 4 towns named on the license records based here, with the number of listings in each, most first.
License classes on the Clark County records
Each class as the issuing agency prints it on the license record. A record that names more than one class counts once under each, so the rows can add up to more than 12.
| License class | Trade | Listings |
|---|---|---|
| On-Site Wastewater Inspector | Septic | 7 |
| On-Site Wastewater Designer | Septic | 5 |
Septic Contractors based in Clark County (12)
Sean William HawesLicensed
Salvador Benjamin Robb-ChavezLicensed
Drake Matthew AmundsonLicensed
Nathan Calvin EkLicensed
Justin Noah HartmannLicensed
Chane EkLicensed
Mark R CollierLicensed
Allison Christina JohnsonLicensed
Cory S McNairLicensed
Season L LongLicensed
Cora MartinLicensed
Andrew Phillip LembrickLicensed
Licensed by Clark County
Clark County issued these businesses' licenses, but the address on their license record is not in Clark County.
A Advanced PumpingLicensed
AAA SepticLicensed
AI Septic & ExcavationLicensed
Acre Maker, LLCLicensed
Adrenaline Services, LLCLicensed
Affordable SepticLicensed
Alder ConstructionLicensed
Alltime Construction LLCLicensed
Bloomquist SepticLicensed
Bob's Septic ServiceLicensed
Brad's SepticLicensed
Buck & SonsLicensed
Caseday Services, LLCLicensed
Cedarscape ConstructionLicensed
Clark County SepticLicensed
Downhill Excavating & Drain ServicesLicensed
Earthworks ExcavatingLicensed
Ek Mountain ContractingLicensed
Environmental Works NWLicensed
First Call SepticLicensed
FlohawksLicensed
Good man SanitationLicensed
Green ConstructionLicensed
Handwashing Hygiene NWLicensed
Horizons NW ExcavatingLicensed
Jerry’s SepticLicensed
Jerry’s Septic ServiceLicensed
L&S ContractorLicensed
NW ConstructionLicensed
Northwest CascadeLicensed
Northwest SiteworksLicensed
PR SepticLicensed
Pacific Siteworks LLCLicensed
Pacific Star ExcavatingLicensed
Proline PlumbingLicensed
River City EnvironmentalLicensed
Robb ConstructionLicensed
Seppanen ConstructionLicensed
Speedy SepticLicensed
State Contracting LLCLicensed
TED - DEE Bear SepticLicensed
Timber Tree ClimbingLicensed
W - K ContractingLicensed
Own one of these businesses? Find your listing and claim it.
Looking for a specific contractor? Search by name, business name, or license number.
Services in Clark County, with national cost ranges
Listings based in Clark County whose license class covers each service. Cost ranges are national; each links its cost guide.
| Service | Based in Clark County | National cost |
|---|---|---|
| Septic Tank Pumping | 0 | $250 to $600 |
| Septic System Installation | 0 | $3,600 to $12,500 |
| Septic Inspection | 7 | $150 to $900 |
| Septic System Design | 5 | Varies by site |
| Perc Test and Soil Evaluation | 0 | $250 to $1,000 |
None of the listings based in Clark County hold a license class we can match to septic tank pumping, septic system installation or perc test and soil evaluation. Ask any contractor whether they do this work, or try a nearby city.
Hiring a septic contractor in Clark County
Septic (onsite wastewater) contractors handle everything from routine septic tank pumping and cleaning to repairs, inspections, and new system installation. States license each role separately (a pumper is not necessarily licensed to install, and vice versa), so match the license class to the job.
Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.