Pollution in Snohomish County, Washington

Snohomish County contains 776 EPA-regulated facilities, 146 of which are currently flagged for significant noncompliance. The county also hosts 0 Superfund sites and 25 TRI chemical reporters. EPA has assessed $11.3M in lifetime penalties and TRI reporters disclosed roughly 144.6k lb of on-site releases. That facility count is well above the Washington state average of 152 per county.

Superfund0NPL sites
TRI Facilities25reporters
EPA Facilities776regulated
Sig. Violators146current SNC

Largest releasers

FacilityCityOn-site (lb)Status
Boeing EverettEverett70.2kSig. violation
Fluid MotionArlington32.6kCompliant
C And D Zodiac Corp MarysvilleMarysville18.9kCompliant
Abw TechnologiesArlington8.6kCompliant
Fluid MotionMonroe5.1kCompliant
Composite Aquatic InnovationsArlington4.4kCompliant
Cepheid - BothellBothell1.5kCompliant
Cpp Casting LineEverett1.1kSig. violation
Us Navy Station EverettEverett755Penalties
Morel Industries, Inc.Arlington750Penalties
Northwest Granite Everett SiteEverett547Compliant
Romac IndustriesSultan197Compliant
Seacast Arlington LlcArlington20Compliant
Seattle GalvanizingArlington5Compliant
Romac Industries BothellBothell3Compliant

Significant violators

FacilityCityPenaltiesLast Inspected
Swift Bus Rapid Transit (Brt) Orange LineEverett$20.0k2025-09-11
Everett StpEverett$13.0k2024-06-27
Boeing EverettEverett$9.8k2025-05-14
Canyon Creek Cabinet CompanyMonroe$3.0k2025-03-05
Travis IndustriesMukilteo$1.0k2025-02-21
Artisan Finishing Systems IncMarysville$02026-01-22
BoggsLake Stevens$0
Wislen PlatSnohomish$0
Snohomish Cnty Pwd Arlington ShopArlington$0
Sather FarmsMarysville$02023-04-28
Snohomish Public Utility District No.1Arlington$0
Gayteway Business Park Building CArlington$02025-09-17
St Thomas Orthodox ChurchSnohomish$0
20th Street Se Ballfields Trailhead And Dog ParkLake Stevens$0
Garibaldi Prd - LennarMonroe$0
Snohomish County Fire Protection District #26 Training FacilityGold Bar$0
Everett City Svc Center MvdEverett$02025-08-14
Lockwood LaneEverett$0
Ideal Industrial ParkMarysville$0
Promenade At Town CenterMountlake Terrace$02025-08-05
Lssd Ls 2c Force Main And Gravity MainLake Stevens$0
Canyon RidgeBothell$0
Color Tech Mountlake TerraceMountlake Terrace$02024-06-27
Elkington Phase IiBothell$0
Sather FarmsMarysville$0
Toll EstateLake Stevens$02023-10-05
Korry Electronics EverettEverett$02026-03-11
Colvin PrdMarysville$0
Electric MirrorEverett$02021-09-09
Sulamita Storage Yard And Frontage ImprovementsMukilteo$0
Buse Timber And Sales IncEverett$02025-05-28
King County Brightwater WwtpWoodinville$02024-10-30
Monroe Water System-Purchased Surface WaterMonroe$02024-05-21
Snohomish Cnty Pwd Darrington PitDarrington$0
Whitaker Short PlatLynnwood$02022-05-04
Oak Heights Elementary SchoolLynnwood$0
Village At Lake StevensLake Stevens$0
Pilchuck Sand & Gravel IncSnohomish$0
Izabella's RidgeBrier$0
Hci Steel Building Systems IncArlington$02025-09-17
I-5/Nb Marine View Drive To Sr 529Everett$02023-11-30
LagoMukilteo$0
Scarsella Bros Reiter RdGold Bar$0
Mukilteo Elementary SchoolMukilteo$02025-09-25
Lakewood Heights PrdMarysville$0
Rairdon Kia Auto DealershipMarysville$0
Wolfkill Feed Fertilizer Corp MonroeMonroe$02019-05-10
Snohomish Gardens LennarSnohomish$0
Adpro Litho IncMukilteo$02023-09-08
Snohomish StpSnohomish$02025-07-30