Septic Services
Aerobic Septic System (ATU) Maintenance — Snohomish, Skagit & Island Counties
State-required O&M inspections, certified maintenance, and repairs for all aerobic treatment unit (ATU) brands in Western Washington.
⚠️ Washington State Requirement (WAC 246-272A)
All ATU owners in Washington are legally required to maintain a certified O&M contract and have their system inspected at least twice per year. We handle compliance and county reporting for you.
ATU Brands We Service
We are certified technicians for all major aerobic treatment unit brands used in Snohomish, Skagit, and Island Counties.
Norweco Singulair
One of the most common ATU brands in Western WA. We service all Singulair models including Green, Bio-kinetic, and TNT.
Bio-Microbics FAST
Fixed Activated Sludge Treatment systems requiring scheduled O&M inspections and aerator maintenance.
NuWater BNR
Biological Nutrient Removal systems — critical in marine-sensitive Island County locations.
OSCAR XO2
High-performance aerobic treatment units requiring certified technician inspections.
Jet
Jet aerobic systems are common throughout our service area — we stock common Jet parts on our trucks.
Clearstream
Clearstream ATU maintenance and biannual O&M contract services available.
What's Included in Every ATU O&M Inspection
Bundle Your Required ATU Maintenance Into the Protection Plan
ATU owners can include their mandatory biannual O&M inspections in the Blackwater Protection Plan — one predictable monthly rate that covers compliance, priority service, and discounted repairs. Never miss a required inspection or county deadline again.
Learn About the Protection Plan →ATU Maintenance FAQs
Are ATU (aerobic) inspections required by law in Washington State?
Yes. Washington State law (WAC 246-272A) requires all aerobic treatment unit (ATU) owners to maintain a valid Operation & Maintenance (O&M) contract with a certified service provider and have their system inspected at least twice per year. Failure to comply can result in county fines and a required repair order.
How much do ATU O&M inspections cost?
O&M contract pricing depends on system type and inspection frequency. Many homeowners bundle their required inspections into the Blackwater Protection Plan — one monthly rate that covers compliance, service calls, and priority repairs. Call (425) 777-4545 for pricing.
What happens during an ATU O&M inspection?
We inspect the aeration system, check the blower/aerator, test chlorine levels (if applicable), inspect spray heads, check alarms, and confirm the system is treating effluent to the required standard. We file the required compliance report with the county health department on your behalf.
My ATU alarm is going off — is that an emergency?
Yes — treat it as one. ATU alarms can indicate aeration failure, which means the system is no longer treating effluent properly. This is a health and compliance issue. Call (425) 777-4545 immediately.
Can I bundle my ATU maintenance into the Protection Plan?
Yes — and this is the most cost-effective way to handle required O&M. ATU owners can include their biannual inspections in their Protection Plan, covering compliance, parts, and service calls in one predictable monthly rate.
Bundle Your ATU Compliance Into the BPP
ATU owners can include mandatory biannual O&M inspections in the Blackwater Protection Plan — one predictable monthly rate covering compliance, priority service, and repair credits. Never miss a county deadline again.
No obligation. Licensed & insured. Serving Snohomish, Skagit & Island Counties.