PlainWater
Counties → California

Riverside County, California

Water Systems
201
Population Served
2,839,125
Total Violations
6,103
1,566 health-based
PFAS Detected
20
of 31 tested

Violation Analysis

93.5%
Systems with Violations
30.4
Avg Violations per System
25.7%
Health-Based Violations

Water Source Types

GW
31 systems (15%)
SW
19 systems (9%)

PFAS Contamination

31
Systems Tested
20
PFAS Detected
64.5%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Riverside California water systems by violation status, EPA SDWIS records.

No violations on record (2) One or more violations (48)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Eastern Municipal WD 666,581 6 Clean
Riverside, City Of 298,398 1 Detected
Coachella Vwd: Cove Community 270,000 3 Clean
Elsinore Valley MWD 169,455 22 Detected
Corona, City Of 168,575 36 Detected
Rancho California Water District 146,147 4 Detected
Jurupa Community SD 135,093 16 Clean
Anza Community Hall 92,019 18 -
Western MWD 86,062 0 Detected
Indio Water Authority 84,757 14 Clean
Desert Water Agency 74,807 22 Clean
Beaumont Cherry Valley WD 66,841 8 Clean
Goose Creek Golf Club 57,628 24 -
Lake Hemet MWD 52,913 8 Clean
Coachella Water Authority 43,590 24 Clean
Mission Springs WD 43,484 21 Clean
Rubidoux Community SD 36,827 103 Detected
Aguanga Market Water System 36,012 3 -
Hemet, City Of 33,828 53 Clean
Banning, City Of 31,680 23 Detected
Norco, City Of 25,068 144 Detected
La Cocina 24,524 12 -
Temescal Valley Water District 21,971 16 Clean
San Jacinto, City Of 18,950 11 Clean
Western MWD - Murrieta Division 17,453 14 Detected
South Mesa WC 10,108 14 Detected
Blythe - City Of 9,798 23 Clean
Myoma Dunes Mutual Water Company 9,445 1 Clean
Caltrans, Cactus City Rest Area 6,800 26 -
Nuevo Water Company 6,733 16 Detected
Caltrans, Whitewater Rest Area 6,000 22 -
Santa Ana River Water Company 5,848 24 Clean
Valley Auto Water 5,215 3 -
Coachella Vwd: I.D. No. 8 4,600 1 Clean
California Rehabilitation Center - Norco 4,300 69 Detected
Chuckawalla Valley State Prison 4,090 24 Clean
Farm Mutual W.C. (The) 4,026 30 Detected
Idyllwild Water District 3,762 12 -
Box Springs Mutual WC 3,382 16 -
Home Gardens County WD 3,095 176 -
Terwilliger Association 2,401 13 -
Eisenhower Medical Center(water) 2,300 51 -
Cabazon Water District 2,010 59 -
Mecca Arco Travel Center 1,847 69 -
Ladera Golf Club 1,806 0 -
Palm Springs Aerial Tramway 1,799 31 -
Pine Cove Water District 1,540 22 -
Hidden Valley Nature Center 1,210 4 -
Temecula/Vail Lake KOA 1,125 24 -
Glen Ivy Hot Springs 1,087 50 -

Other Counties in California

Los Angeles County
276 systems · 10,109,089 served · 3,972 violations
San Diego County
197 systems · 3,744,323 served · 4,832 violations
Orange County
46 systems · 3,201,893 served · 507 violations
San Bernardino County
318 systems · 2,830,626 served · 4,611 violations
Alameda County
27 systems · 2,249,634 served · 275 violations
Santa Clara County
119 systems · 2,097,044 served · 2,640 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Riverside County? ▼
Riverside County has 6,103 total drinking water violations across 201 water systems, of which 1,566 are health-based violations. 93.5% of systems have at least one violation.
How many people get water from Riverside County systems? ▼
Water systems in Riverside County serve approximately 2,839,125 people through 201 public water systems.
Has PFAS been detected in Riverside County water? ▼
Of 31 water systems tested for PFAS in Riverside County, 20 had PFAS detected (64.5% detection rate).
What types of water sources supply Riverside County? ▼
Water systems in Riverside County use GW (31 systems), SW (19 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 25.7% of Riverside County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.