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.
Systems with a Nitrite violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Corona, City of Corona · Riverside County |
169,380 | 6 | 0 | |
|
City of Sunnyvale Sunnyvale · Santa Clara County |
157,566 | 5 | 0 | |
|
Jalama Beach Park Santa Barbara County |
120,017 | 1 | 0 | |
|
Norco, City of Norco · Riverside County |
25,068 | 5 | 0 | |
|
Sierra Tahoe West Bowl El Dorado County |
1,900 | 2 | 0 | |
|
Richgrove Community Services District Tulare County |
1,617 | 8 | 3 | |
|
Lakeside Park Association El Dorado County |
924 | 5 | 1 | |
|
Madison Service Dist Yolo County |
876 | 8 | 1 | |
|
Rainbo Beach San Bernardino County |
700 | 2 | 0 | |
|
Chico Eastside Little League Butte County |
500 | 1 | 0 | |
|
Knoll Enterprises San Bernardino County |
500 | 6 | 2 | |
|
Sierra Tahoe Grandview El Dorado County |
500 | 2 | 0 | |
|
Rancheritos Mwc San Bernardino County |
487 | 1 | 0 | |
|
Madera MH & RV Park Madera County |
450 | 5 | 0 | |
|
Big Valley Rancheria Water District County |
417 | 1 | 0 | |
|
Lo-Fi Winery Santa Barbara County |
413 | 1 | 0 | |
|
Sharondale Mesa HOA Riverside County |
340 | 3 | 0 | |
|
Moose Lodge 2096 San Bernardino County |
278 | 1 | 0 | |
|
Oakvale Park San Diego County |
260 | 3 | 0 | |
|
Dollar General Store # 14280 San Bernardino County |
250 | 1 | 0 | |
|
Cacheville Service Dist Yolo County |
239 | 8 | 1 | |
|
Folded Hills Winery Santa Barbara County |
235 | 1 | 0 | |
|
Miller's Landing Resort Madera County |
230 | 1 | 0 | |
|
Nord Country School Butte County |
230 | 3 | 1 | |
|
Yurok Requa County |
215 | 7 | 2 | |
|
Emerald Cove Camp Madera County |
204 | 1 | 0 | |
|
Bear River Camp--South Shore Amador County |
200 | 2 | 0 | |
|
Forest Lawn Scout Reservation San Bernardino County |
200 | 2 | 0 | |
|
Gordon Acres Water CO San Bernardino County |
200 | 6 | 4 | |
|
Ice House Campground El Dorado County |
200 | 1 | 0 | |
|
Jehovah's Witnesses Southport Yolo County |
200 | 1 | 0 | |
|
Melody Woods Water Company Santa Clara County |
168 | 3 | 0 | |
|
Bar H Mwc San Bernardino County |
155 | 5 | 4 | |
|
Bud Antle, Llc Marina Facility WS Monterey County |
151 | 3 | 2 | |
|
Calico Lake Homeowners San Bernardino County |
150 | 3 | 1 | |
|
Foster Road Mutual Water Company Santa Barbara County |
150 | 4 | 0 | |
|
Jess Martin County Park San Diego County |
150 | 1 | 0 | |
|
Madera Hispanic Church Madera · Madera County |
125 | 1 | 0 | |
|
Institute of Mental Physics San Bernardino County |
120 | 3 | 1 | |
|
Kinecta Fcu Santa Barbara County |
104 | 4 | 0 | |
|
Beasore Mutual Water Co. Madera County |
100 | 1 | 0 | |
|
Fox Sparrow RV Park El Dorado County |
100 | 2 | 0 | |
|
Holland Burger Cafe San Bernardino County |
100 | 2 | 0 | |
|
Lytle Creek Administration Site San Bernardino County |
100 | 5 | 3 | |
|
Pioneer Market Madera County |
100 | 1 | 0 | |
|
Stockton Silver Lake Family Camp Amador County |
100 | 1 | 0 | |
|
San Joaquin Wine Company Madera County |
90 | 2 | 0 | |
|
Stan's Yolo Marina Yolo County |
90 | 1 | 0 | |
|
Chamisal Mwc San Bernardino County |
84 | 3 | 1 | |
|
John Hovannisian Water System Madera County |
80 | 8 | 1 |
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. Retrieved from ECHO on Oct 11, 2026.