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Counties → California

San Benito County, California

SDWIS compliance plate

Sheet CA069 · San Benito County 63 sys · 1,506 viol · #670/3254

VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-MID · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 90.5% flagged
  • HEALTH-MID 36.8% health
  • RANK-UPPER #670/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-MID 25.0% detect
  • SRC-GW GW lead 92%
  • SYS-MID 63 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Stanislaus County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, San Benito County ranks #670 of 3,254 counties by people served, and #42 of 58 counties in California. See methodology · corpus placement.

San Benito County standing, lower-flagged corpus third

Flagged-system rate 90.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 36.8% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #670 of 3,254 · #42 of 58 in California.

Flagged-rate neighbourhood around San Benito County

Lowest/highest poles plus in-state counties nearest San Benito County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Alpine · lowest Stanislaus · near Lake · near Sutter · highest 70% 89.8% 90.3% 90.5% 91.4% 91.5% 97.1%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

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 -

Compare beyond California

Lower-flagged peers for San Benito County

Cross-state counties nearest San Benito County on flagged-system share (90.5%) and cumulative violation count (1,506). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - 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

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.