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 |
|---|---|---|---|---|
|
Lakewood Community Mason County |
45 | 2 | 0 | |
|
Vicente Farms & Sons Enterprise Whatcom County |
45 | 2 | 0 | |
|
Flying H Youth Ranch Yakima County |
44 | 3 | 0 | |
|
Grunewald Guild Chelan County |
44 | 2 | 0 | |
|
Olympic Trails Water Supply Mason County |
44 | 1 | 0 | |
|
Chabad Jewish Discovery Center Thurston County |
43 | 2 | 0 | |
|
Chattaroy Springs Water Assn Spokane County |
43 | 2 | 1 | |
|
Lds Church (belfair Building) Mason County |
43 | 1 | 0 | |
|
Big Toe Salvage Benton County |
42 | 2 | 0 | |
|
Darrington Water Association Snohomish County |
42 | 4 | 1 | |
|
MR Qwiks Country Store Franklin County |
42 | 2 | 0 | |
|
Sravasti Abbey Water System Pend Oreille County |
42 | 1 | 0 | |
|
Twin Lakes Hud Nespelem · County |
42 | 8 | 1 | |
|
Spee-Bi-Dah Snohomish County |
41 | 1 | 0 | |
|
Afc Ranch 7 Douglas County |
40 | 1 | 0 | |
|
Tieton Orchards North Yakima County |
40 | 2 | 0 | |
|
Good Neighbors Water Assn Benton County |
40 | 1 | 0 | |
|
Tula Young Hastings Farm Wsu Whitman County |
40 | 2 | 0 | |
|
Www 1 Chelan County |
40 | 2 | 0 | |
|
Lakebay Community Church Pierce County |
38 | 1 | 0 | |
|
Seawest Water System Island County |
38 | 2 | 0 | |
|
Wind River Admin Site Skamania County |
38 | 2 | 0 | |
|
Willow Bay Resort INC Stevens County |
37 | 1 | 0 | |
|
Clayton Orchards Housing Douglas County |
36 | 2 | 0 | |
|
Fords Prairie Animal Clinic Lewis County |
36 | 1 | 0 | |
|
Hiway Trailer Court Garfield County |
36 | 2 | 0 | |
|
Noor Energy Inc Whatcom County |
36 | 2 | 0 | |
|
Solar Pines Water Assn Stevens County |
36 | 2 | 0 | |
|
Casia Lodge & Ranch Okanogan County |
35 | 2 | 0 | |
|
Green Acres Day Care Snohomish County |
35 | 1 | 0 | |
|
Maple Hill Park Island County |
35 | 4 | 0 | |
|
Sleepy Hollow Apts Spokane County |
35 | 4 | 0 | |
|
Spectacle Lake Resort Okanogan County |
35 | 1 | 0 | |
|
Tokeland CO OP Pacific County |
35 | 1 | 0 | |
|
Wecoma Shores Water System San Juan County |
35 | 2 | 0 | |
|
Fpl Energy Vansycle Walla Walla County |
34 | 2 | 0 | |
|
Offut Lake Resort Thurston County |
34 | 1 | 0 | |
|
Rockport State Park Skagit County |
34 | 1 | 0 | |
|
Salmon la Sac CG I/cle Elum RD Kittitas County |
34 | 1 | 0 | |
|
Timberland Library Salkum Lewis County |
34 | 2 | 0 | |
|
Ballard Resort Grant County |
33 | 1 | 0 | |
|
Jmt Elk Spokane County |
33 | 1 | 0 | |
|
Mineral School Lewis County |
33 | 2 | 0 | |
|
Panther Campground HP 2b Skamania County |
33 | 2 | 0 | |
|
Baileys Feed Store Thurston County |
32 | 2 | 0 | |
|
Bear Creek Store Mason County |
32 | 2 | 0 | |
|
Big Barn Brewing Spokane County |
32 | 2 | 0 | |
|
Georgetown Water Association Island County |
32 | 5 | 0 | |
|
Lost Lake Campgound Okanogan County |
32 | 2 | 0 | |
|
Rubys on Silver Lake Spokane County |
31 | 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.