Lead and Copper Rule Revisions (LCRR) violations in California
842 active public water systems in California had a Lead and Copper Rule Revisions (LCRR) violation in the past three years, 844 of them in the latest quarter of EPA's data. What Lead and Copper Rule Revisions (LCRR) is and why it matters.
Systems with a Lead and Copper Rule Revisions (LCRR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Llano Mutual Water Company Los Angeles County |
245 | 1 | 1 | |
|
Charles Brown Water Company Inyo County |
242 | 3 | 1 | |
|
Lundberg Family Farm Butte County |
240 | 1 | 1 | |
|
Millville Elementary School Shasta County |
240 | 1 | 1 | |
|
Mountain Elementary School Santa Cruz County |
240 | 1 | 1 | |
|
Cacheville Service Dist Yolo County |
239 | 8 | 1 | |
|
Casitas Mutual Water Company Ventura County |
238 | 2 | 2 | |
|
Salyer Mutual WC (formerly Riverview Ac) Trinity County |
231 | 2 | 1 | |
|
Crowley Lake Trailer Park Mono County |
230 | 1 | 1 | |
|
First Mace Meadows Unit No. 2 Amador County |
230 | 1 | 1 | |
|
Nord Country School Butte County |
230 | 3 | 1 | |
|
Terry School Fresno County |
226 | 1 | 1 | |
|
Anza Mutual Water Company Riverside County |
224 | 1 | 1 | |
|
Lucerne Vista Mwc San Bernardino County |
224 | 2 | 2 | |
|
Pine Cove RV Park Trinity County |
223 | 1 | 1 | |
|
Francis Coppola Winery Sonoma County |
222 | 1 | 1 | |
|
Pioneer Elementary School El Dorado County |
221 | 2 | 1 | |
|
Waukena Elementary School Tulare County |
220 | 3 | 1 | |
|
Coleville High School Mono County |
216 | 1 | 1 | |
|
Pond-Derosa Oaks WC Monterey County |
216 | 1 | 1 | |
|
Del Norte Mutual Water Co. Ventura County |
215 | 3 | 1 | |
|
Ridge Mutual Water Company Santa Cruz County |
213 | 1 | 1 | |
|
Saint Andrews Abbey Los Angeles County |
210 | 1 | 1 | |
|
Capell Valley Estates Napa County |
208 | 2 | 2 | |
|
Lawndale Mutual Water Company Sonoma County |
208 | 1 | 1 | |
|
Elk County Water District Mendocino County |
207 | 1 | 1 | |
|
Orland Estates Mobile H.p. Glenn County |
207 | 1 | 0 | |
|
Porterville Mobile Village Tulare County |
205 | 1 | 1 | |
|
Date Gardens Mobile Home Park Imperial County |
202 | 2 | 1 | |
|
Twain Harte Valley Mwc Tuolumne County |
202 | 2 | 1 | |
|
Blairsden Water Users Assn Plumas County |
200 | 1 | 1 | |
|
City of 10,000 Buddhas Ukiah · Mendocino County |
200 | 1 | 1 | |
|
Domaine Chandon Napa County |
200 | 2 | 1 | |
|
EL Adobe Poa, Inc. Kern County |
200 | 2 | 1 | |
|
Geyserville Newtech Academy School Sonoma County |
200 | 1 | 1 | |
|
Gordon Acres Water CO San Bernardino County |
200 | 6 | 4 | |
|
Live Oak Waldorf School Placer County |
200 | 1 | 1 | |
|
Monroe School Fresno County |
200 | 1 | 1 | |
|
Presentation School Sonoma County |
200 | 1 | 1 | |
|
Redwood Park C.s.d. Del Norte County |
200 | 2 | 1 | |
|
Sierra Linda Mutual Water CO Madera County |
200 | 3 | 1 | |
|
Sycamore Mineral Springs Resort San Luis Obispo County |
200 | 1 | 1 | |
|
Tomales High School Marin County |
200 | 1 | 1 | |
|
Walnut Grove Elementary School Sacramento County |
200 | 1 | 1 | |
|
Colonial Oak WC INC Monterey County |
198 | 2 | 1 | |
|
Sterling Mutual Water Company Los Angeles County |
198 | 2 | 2 | |
|
Laton High School Fresno County |
197 | 1 | 1 | |
|
Alpine Acres Mutual Water CO Tuolumne County |
195 | 3 | 0 | |
|
Silver Dollar Fairgrounds Butte County |
195 | 1 | 1 | |
|
Accelerated Charter High School Tulare County |
192 | 2 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Lead and Copper Rule Revisions (LCRR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Lead and Copper Rule Revisions (LCRR) 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.