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 |
|---|---|---|---|---|
|
South Whidbey Parks & Rec District Island County |
178 | 1 | 0 | |
|
Burbank Heights Walla Walla County |
177 | 4 | 0 | |
|
Southgate Water Company Benton County |
175 | 2 | 0 | |
|
Stehekin Pastry Company Chelan County |
174 | 2 | 0 | |
|
Horseshoe Lake Golf Course Kitsap County |
173 | 1 | 0 | |
|
Mutiny View Manor Community Club Island County |
173 | 2 | 0 | |
|
Brinnon Square Jefferson County |
172 | 1 | 0 | |
|
Greenbank Village Island County |
165 | 2 | 0 | |
|
One Point Fosdick Water Company Pierce County |
165 | 1 | 0 | |
|
Mount ST Michaels School & Church Spokane County |
162 | 3 | 0 | |
|
Rainbow Beach Resort Coulee Dam · County |
158 | 4 | 2 | |
|
Lytle Water System Chelan County |
156 | 1 | 0 | |
|
Westshore Water Company Grant County |
153 | 2 | 1 | |
|
Coho Campground Grays Harbor County |
152 | 2 | 0 | |
|
Taggares Fruit Co Walla Walla County |
152 | 2 | 0 | |
|
5 Cedars Deming · County |
150 | 5 | 0 | |
|
Alps Mobile Home Park Yakima County |
150 | 2 | 0 | |
|
Bumping Lake Marina Yakima County |
150 | 1 | 0 | |
|
Chewelah Lds Chapel Stevens County |
150 | 2 | 0 | |
|
Four Creeks Ranch Water System King County |
150 | 1 | 0 | |
|
Panorama Mobile Home Park Stevens County |
150 | 4 | 0 | |
|
Peach Beach RV Park Klickitat County |
150 | 1 | 0 | |
|
Rutsatz Road Deming · County |
150 | 5 | 0 | |
|
Spencer Lake Bar and Grill Mason County |
150 | 1 | 0 | |
|
Sulwhanon Sverson · County |
150 | 5 | 0 | |
|
Camp Ghormley Yakima County |
142 | 2 | 0 | |
|
Race Lagoon Heights Association Island County |
141 | 3 | 0 | |
|
Decatur Shores Community Assoc San Juan County |
140 | 1 | 0 | |
|
Old German Baptist Church New Conf Franklin County |
140 | 2 | 0 | |
|
Ranch House Bbq Thurston County |
135 | 2 | 0 | |
|
Otto Water System Pierce County |
133 | 2 | 0 | |
|
Silver Springs Campground Pierce County |
131 | 1 | 0 | |
|
Wyckoff Farms Benton County |
131 | 1 | 0 | |
|
Camp Benbow Pierce County |
130 | 2 | 0 | |
|
Sydney Heights Water Assn Walla Walla County |
130 | 2 | 0 | |
|
Eagle Valley Campground Kittitas County |
129 | 2 | 0 | |
|
Ginkgo State Park-Natural Area Kittitas County |
129 | 2 | 0 | |
|
Eric G. Sandstrom VFW 969 Pierce County |
126 | 2 | 0 | |
|
Meridian Heights Water District Thurston County |
126 | 1 | 0 | |
|
Sundown M Ranch Yakima County |
126 | 1 | 0 | |
|
Finley Shopper the Benton County |
125 | 1 | 0 | |
|
Snider Field Kitsap County |
122 | 2 | 0 | |
|
Tall Timber Ranch Water System Chelan County |
122 | 2 | 0 | |
|
Fargher Lake Restaurant Clark County |
121 | 1 | 0 | |
|
Wilgus Housing Water System Benton County |
121 | 3 | 0 | |
|
Chief Kitsap Academy Poulsbo · County |
120 | 6 | 0 | |
|
Hoh Tribe Forks · County |
120 | 9 | 1 | |
|
Yak CO Gala Estates Water System Yakima County |
119 | 2 | 0 | |
|
Sage Hills Golf Club & RV Resort Grant County |
115 | 2 | 0 | |
|
Seatons Grove Nespelem · County |
115 | 9 | 1 |
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.