PlainWater
Counties → California

Fresno County, California

Water Systems
340
Population Served
1,053,609
Total Violations
11,624
5,309 health-based
PFAS Detected
9
of 20 tested

Violation Analysis

92.6%
Systems with Violations
34.2
Avg Violations per System
45.7%
Health-Based Violations

Water Source Types

GW
40 systems (12%)
SW
10 systems (3%)

PFAS Contamination

20
Systems Tested
9
PFAS Detected
45.0%
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

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

No violations on record (0) One or more violations (50)

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
City of Fresno 545,716 33 Detected
City of Clovis 130,130 14 Detected
California State University Fresno 41,000 4 Detected
Cws - Selma 26,517 2 Clean
City of Sanger 26,357 18 Detected
Reedley, City Of 26,076 26 Clean
Bakman Water Company 17,393 14 Clean
Coalinga-City 17,277 77 Clean
Kerman, City Of 17,256 26 Clean
Pinedale County Water District 16,736 33 Detected
City of Parlier 14,576 32 Clean
Kingsburg, City Of 13,540 35 Clean
Mendota, City Of 11,404 29 Clean
City of Orange Cove 9,525 37 Clean
Huron, City Of 9,306 117 Clean
Firebaugh City 8,096 25 Clean
City of Fowler 7,448 21 Detected
Cherry Auction 7,000 10 -
Malaga County Water District 5,979 36 Clean
Camp Fresno Water System 5,600 59 -
San Joaquin, City Of 4,060 39 Clean
Wild Water Adventures 3,000 19 -
Nps-Grant Grove 2,950 9 -
Nps-Sheep Creek 2,900 10 -
Riverdale Public Utility District 2,756 126 -
Fcwwd 41/Shaver Lake 2,722 36 -
Caruthers Comm Serv Dist 2,613 140 -
Selma High School 2,225 29 -
Fcsa 47 - Quail Lake Estates 1,988 14 -
Harris Ranch Restaurant 1,750 174 -
Biola Community Services Dist 1,623 61 -
Hume Lake Christian Camps, Inc 1,519 7 -
Del Rey Community Serv Dist 1,491 20 -
Usfs/Dinkey Creek Campground 1,400 27 -
Countryside Care Center 1,274 21 -
Shant Bhavan Punjabi Funeral Home 1,200 9 -
Laton Community Services District 1,151 19 Detected
Fcsa 34 - Millerton New Town 1,117 54 -
Harris Ranch Beef Co 1,009 4 -
Easton Authority Jpa 1,000 44 -
Usfs/Rancheria Campground 906 13 -
Usfs/Dorabelle Campground 900 14 -
Sierra Cedars Csd 850 27 -
Shaver Lake Heights MWC 836 60 -
Western Valley Meat Company 815 55 -
Tranquillity Irrigation District 807 96 -
Fcwwd 18/Friant 772 50 -
Central High School West 758 11 -
Usfs/Deer Creek Campground 750 11 -
Sun Maid Growers of California 750 25 -

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
Riverside County
201 systems · 2,839,125 served · 6,103 violations
San Bernardino County
318 systems · 2,830,626 served · 4,611 violations
Alameda County
27 systems · 2,249,634 served · 275 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Fresno County? ▼
Fresno County has 11,624 total drinking water violations across 340 water systems, of which 5,309 are health-based violations. 92.6% of systems have at least one violation.
How many people get water from Fresno County systems? ▼
Water systems in Fresno County serve approximately 1,053,609 people through 340 public water systems.
Has PFAS been detected in Fresno County water? ▼
Of 20 water systems tested for PFAS in Fresno County, 9 had PFAS detected (45.0% detection rate).
What types of water sources supply Fresno County? ▼
Water systems in Fresno County use GW (40 systems), SW (10 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. 45.7% of Fresno 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.