Licensed Septic Companies in Washington County, ID
8 septic companies serve Washington County, Idaho, and 8 of them hold a Idaho septic license or certification matched to the Idaho Public Health Districts / Idaho DEQ list (data as of October 2026).
Septic services in Washington County
Guides: Septic system installation · Septic repair · Drain field repair · Aerobic septic systems · Installation cost · Pumping cost
8 septic companies in Washington County
Cambridge 3
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A3 Underground Construction
3494 Rush Creek Rd, Cambridge, ID 83610
- Licensed: Idaho Permitted Septic Complex Installer (Idaho Public Health Districts / Idaho DEQ, verify)
From their website: Installation · Repair · Drain field · Aerobic systems · Risers & lids · Perc testing
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Kim Braun Construction Services
290 Central Blv, Cambridge, ID 83610
- Licensed: Idaho Permitted Septic Standard/Basic Installer (Idaho Public Health Districts / Idaho DEQ, verify)
Per state license: Installation
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Upgrade Excavation, Inc
3105 Highway 95 Cambridge Id 83610, Cambridge, ID 83610
- Licensed: Idaho Permitted Septic Complex Installer (Idaho Public Health Districts / Idaho DEQ, verify)
From their website: Installation · Risers & lids
Elsewhere in Washington County 2
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Circle C Excavation
308 E Park St Weiser ID 83672, ID
- Licensed: Idaho Permitted Septic Complex Installer (Idaho Public Health Districts / Idaho DEQ, verify)
Per state license: Installation
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L2 Insulation Inc
393 SW 7th Ave Meridian Id 83645, ID
- Licensed: Idaho Permitted Septic Complex Installer (Idaho Public Health Districts / Idaho DEQ, verify)
Per state license: Installation
Weiser 2
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Advanced Terrain Design
830 Jonathan Rd, Weiser, ID 83672
- Licensed: Idaho Permitted Septic Complex Installer (Idaho Public Health Districts / Idaho DEQ, verify)
Per state license: Installation
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Backhoe and Concrete Works, LLC.
808 Haas Rd, Weiser, ID 83672
- Licensed: Idaho Permitted Septic Standard/Basic Installer (Idaho Public Health Districts / Idaho DEQ, verify)
Per state license: Installation
Midvale 1
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DD Fairchild Excavation
2124 Dynoke Lane, Midvale, ID 83645
- Licensed: Idaho Permitted Septic Standard/Basic Installer (Idaho Public Health Districts / Idaho DEQ, verify)
Per state license: Installation
No listings match those filters.
Septic licensing in Idaho
Idaho installers and pumpers hold permits from the public health districts. Idaho Code 9-348 prohibits using the state's lists as a mailing or phone list. The Idaho's seven public health districts, under Idaho DEQ rules issues these credentials: Standard/basic installer registration permit; Complex installer registration permit; Septic pumper permit.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Washington County and whether the permit fee is in their quote.
Idaho septic licensing: agencies, license types and how to check a license →
Septic companies in Washington County: common questions
How many licensed septic companies are in Washington County, ID?
8 septic companies serve Washington County, Idaho, and 8 of them hold a Idaho septic license or certification matched to the Idaho Public Health Districts / Idaho DEQ list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in Idaho?
Idaho installers and pumpers hold permits from the public health districts. Idaho Code 9-348 prohibits using the state's lists as a mailing or phone list. The licensing body is the Idaho's seven public health districts, under Idaho DEQ rules.
Which companies install septic systems in Washington County?
8 listings in Washington County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Idaho license.
How do I check a septic contractor's license in Idaho?
Use the Idaho's seven public health districts, under Idaho DEQ rules's lookup (https://www.deq.idaho.gov/water-quality/wastewater/septic-and-septage/) and search the contractor's name or license number. Our guide to checking a septic license walks through it.