Nitrate violations in Washington
452 active public water systems in Washington had a Nitrate violation in the past three years, 15 of them in the latest quarter of EPA's data. What Nitrate is and why it matters.
Systems with a Nitrate violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Campbells Glen Island County |
62 | 6 | 1 | |
|
Matheson Kitsap County |
62 | 1 | 0 | |
|
Cascade Foothills Douglas County |
61 | 1 | 0 | |
|
Lattins Country Cider Mill & Farm Thurston County |
61 | 1 | 0 | |
|
Rainier Tracts Water Assn Adams County |
61 | 4 | 0 | |
|
South Bay Terraces Water Company Thurston County |
61 | 1 | 0 | |
|
Teen Challenge Spokane County |
61 | 2 | 0 | |
|
Emanuel Heights Water System Okanogan County |
60 | 2 | 0 | |
|
Island Park Mobile Home Park Island County |
60 | 2 | 0 | |
|
Kellys Resort Chelan County |
60 | 1 | 0 | |
|
Our Lady of Valley Catholic Church Okanogan County |
60 | 2 | 0 | |
|
Zebisrael Thurston County |
60 | 1 | 0 | |
|
Agrinorthwest Riverbend Benton County |
59 | 2 | 0 | |
|
Naches Tavern Pierce County |
59 | 2 | 0 | |
|
Beaver Campground Skamania County |
57 | 1 | 0 | |
|
Hill Valley Mason County |
57 | 1 | 0 | |
|
Johns River Lodge Grays Harbor County |
57 | 2 | 0 | |
|
Olympic Orchards Well #1 Yakima County |
57 | 2 | 1 | |
|
Peterson Prairie Skamania County |
57 | 1 | 0 | |
|
Burbank Lds Church Walla Walla County |
56 | 1 | 0 | |
|
Lookout Arts Quarry Water System Skagit County |
56 | 2 | 0 | |
|
Mutual Materials Company Spokane County |
55 | 5 | 0 | |
|
Welcome Store Whatcom County |
55 | 2 | 0 | |
|
Big Creek Campground Olympic NF Mason County |
54 | 1 | 0 | |
|
Homeport Water System Pierce County |
54 | 2 | 0 | |
|
Lyons Ferry Marina Columbia County |
54 | 2 | 0 | |
|
Rader Farms Labor Camp Whatcom County |
54 | 1 | 0 | |
|
West View Apartments Water System Island County |
54 | 2 | 0 | |
|
Chamonix Village King County |
53 | 3 | 0 | |
|
Nine Mile Store Spokane County |
53 | 1 | 0 | |
|
San Juan Vineyards Water System San Juan County |
52 | 2 | 0 | |
|
Syringa Heights Mobile Home Park Spokane County |
52 | 4 | 1 | |
|
Cox Brays Landing Water System Douglas County |
51 | 1 | 0 | |
|
Alcoa Chelan County |
50 | 1 | 0 | |
|
Bets Water System Island County |
50 | 4 | 0 | |
|
Deytona Clallam County |
50 | 3 | 0 | |
|
Lakeview Franklin County |
50 | 1 | 0 | |
|
Needle Creek Water System King County |
50 | 2 | 0 | |
|
Oddfellows Park Island County |
50 | 2 | 0 | |
|
Ski View Estates Thurston County |
50 | 4 | 0 | |
|
Gold Bar Nature Trails Snohomish County |
49 | 2 | 0 | |
|
Rizzuti Farms Grant County |
48 | 1 | 0 | |
|
Spring Creek National Fish Hatchery Skamania County |
48 | 2 | 0 | |
|
Blu-Shastin RV Park Chelan County |
47 | 2 | 0 | |
|
Commellinis Restaurant Spokane County |
46 | 1 | 0 | |
|
Deception Pass Marina INC Island County |
46 | 1 | 0 | |
|
H&i Grocery Cowlitz County |
46 | 2 | 0 | |
|
Alpine Mobile Manor King County |
45 | 3 | 0 | |
|
Damman School Kittitas County |
45 | 5 | 1 | |
|
Huntley Lodge LLC Kittitas County |
45 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Washington records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.