Nitrite violations in California
82 active public water systems in California had a Nitrite violation in the past three years. What Nitrite is and why it matters.
Health effects: Methemoglobinemia ('blue baby syndrome') in infants under 6 months: reduced oxygen delivery to tissues can be life-threatening. Pregnant women and people with glucose-6-phosphate dehydrogenase (G6PD) deficiency are also at elevated risk. Adults are generally less susceptible due to more effective methemoglobin reduction.
Systems with a Nitrite violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Tahoe Sands Inn El Dorado County |
71 | 2 | 0 | |
|
VFW Post 5551 San Bernardino County |
70 | 2 | 0 | |
|
Rancho Villanueva LLC County |
68 | 5 | 1 | |
|
Kirkwood Campground Amador County |
65 | 2 | 0 | |
|
Mother Lode Water System El Dorado County |
63 | 2 | 0 | |
|
Twentynine Palms Inn San Bernardino County |
62 | 1 | 0 | |
|
Economy Inn Santa Clara County |
52 | 1 | 0 | |
|
Gibson's Roadhouse Cafe Amador County |
52 | 2 | 0 | |
|
Primm Valley Golf Club San Bernardino County |
50 | 4 | 2 | |
|
Gold Rock Ranch Imperial County |
45 | 5 | 0 | |
|
Darr Water CO San Bernardino County |
43 | 4 | 1 | |
|
L'azienda D'agostini Amador County |
42 | 2 | 0 | |
|
Coarsegold Self Serve Madera County |
40 | 1 | 0 | |
|
Cantina Water System Madera County |
35 | 1 | 0 | |
|
Sws Land Development INC Madera County |
35 | 4 | 0 | |
|
Best Western Cajon Pass San Bernardino County |
34 | 1 | 0 | |
|
Seaboard Energy California, LLC Madera County |
31 | 1 | 0 | |
|
Coarsegold Inn Madera County |
30 | 2 | 0 | |
|
Kyburz Mutual Water Company El Dorado County |
30 | 5 | 0 | |
|
YMCA Camp Whittle San Bernardino County |
30 | 1 | 0 | |
|
Yolo Fruit Stand Water Yolo County |
30 | 2 | 0 | |
|
American Legion #593 WS Monterey County |
25 | 2 | 0 | |
|
Babcock Winery Santa Barbara County |
25 | 1 | 0 | |
|
Bagdad Cafe San Bernardino County |
25 | 2 | 0 | |
|
Moreton Bay Professional Plaza Santa Barbara County |
25 | 6 | 1 | |
|
Relax Inn San Bernardino County |
25 | 1 | 0 | |
|
Santa Ynez Roblar Mobile Home Park Santa Barbara County |
25 | 4 | 0 | |
|
Silverfork School El Dorado County |
25 | 8 | 0 | |
|
Silverwood Japanese Restaurant Sushi & G San Bernardino County |
25 | 1 | 0 | |
|
Robinson's Corner MHP Butte County |
20 | 8 | 2 | |
|
Mountain Streams RV Park San Bernardino County |
16 | 1 | 0 | |
|
Bolo Station RV Park & Snack Bar San Bernardino County |
6 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrite, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrite 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 California 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.