PlainWater
Counties → California

San Benito County, California

Water Systems
63
Population Served
81,517
Total Violations
1,506
554 health-based
PFAS Detected
4
of 4 tested

Violation Analysis

90.5%
Systems with Violations
23.9
Avg Violations per System
36.8%
Health-Based Violations

Water Source Types

GW
46 systems (73%)
SW
4 systems (6%)

PFAS Contamination

4
Systems Tested
4
PFAS Detected
100.0%
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

San Benito California water systems by violation status, EPA SDWIS records.

No violations on record (4) One or more violations (46)

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
Hollister, City Of 26,017 35 Clean
Sunnyslope County Water Dist 24,954 11 Detected
33rd District Agricultural Association 9,000 24 -
San Benito High School 3,310 18 Clean
Aromas Water District 2,988 7 -
San Juan Bautista, City Of 2,335 21 -
Csp Hollister Hills Svra 1,220 20 -
Taylor Farms Retail, Inc. 1,055 36 -
Thousand Trails San Benito Preserve 1,017 77 Clean
Rancho San Joaquin MWC 914 43 -
Pinnacles National Park-East District 658 6 -
Pinnacles National Park Campground 647 0 -
Pacific Scientific Energetic Mats. Comp. 550 11 -
Mission Oaks Mobile Home Park 550 14 -
Kingdom Hall (Fallon RD) 500 6 -
True Leaf Farms, LLC. 372 5 -
Tres Pinos Cwd 350 34 -
George Chiala Farms, Inc.. 350 3 -
Pinnacles National Park-West District 328 6 -
Southside Elementary School 300 22 -
Dunneville Market & Kitchen 300 14 -
Anzar High School 268 2 -
Csp-Fremont Peak 250 16 -
CSA No. 31 Stonegate WS 230 30 -
T & a Onions 165 0 -
San Justo Mutual Water Company 160 74 -
Golden State Water Co - San Juan Oaks 159 0 -
Hollister Ranch Estates 150 42 -
Rosa Morada Mutual Water Company 138 41 -
Ashford Highlands MWC 132 23 -
Hollister SDA Christian School 122 1 -
Dunneville Estates CSA #50 120 0 -
McAlpine Lake & Park 111 38 -
Mission Farm R.V. Park 110 64 -
McMahon Road Mutual Water Company 102 37 -
Comstock Mutual Water Company 100 13 -
Fireclay Tile 100 2 -
Union Heights MWC 98 28 -
Reiter Berry Water System 96 21 -
Vineyard Estates MWC 90 30 -
Fallon Road Labor Housing 84 33 -
Willis Construction WS 76 16 -
St. Francis Retreat Center 69 46 -
Creekbridge Mutual Water Company 69 10 -
Enza Zaden Research 65 10 -
Valenzuela Water System 55 117 -
Casa de Fruta Orchards 53 10 -
Paicines Ranch 52 23 -
Venture Estates MWC 50 68 -
Quintero Labor Camp #1 (Wright RD) 50 23 -

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 San Benito County? ▼
San Benito County has 1,506 total drinking water violations across 63 water systems, of which 554 are health-based violations. 90.5% of systems have at least one violation.
How many people get water from San Benito County systems? ▼
Water systems in San Benito County serve approximately 81,517 people through 63 public water systems.
Has PFAS been detected in San Benito County water? ▼
Of 4 water systems tested for PFAS in San Benito County, 4 had PFAS detected (100.0% detection rate).
What types of water sources supply San Benito County? ▼
Water systems in San Benito County use GW (46 systems), SW (4 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. 36.8% of San Benito 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.