San Benito County, California
5 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-04
Covering 5 ZIP codes, San Benito County falls in the average tier for tap water safety — violations appear in a meaningful share of areas, and the data suggests quality depends heavily on which specific part of the county a household sits in.
How San Benito County Compares
How San Benito County Compares
San Benito County scores 6 points below the California state average (73/100) and 1 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: San Benito County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.9 (asthma 9.2%, diabetes 11.3%)
Estimated additional annual cost per homeowner: $1,870, driven primarily by flood
Infrastructure: 0.362% avg pipe failure probability, 20% of ZIPs at high risk
55% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across San Benito County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 8 violations. Past 5 years: 17 total (17 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,870
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
19,776 housing units in San Benito County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in San Benito County
Remediation costs are relatively manageable for most homeowners in San Benito County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for San Benito County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in San Benito County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Hollister, | 26,017 | 16 |
| 2 | Sunnyslope County Water District | 24,954 | 16 |
| 3 | Rancho San Joaquin Mwc | 914 | 16 |
| 4 | Casa De Fruta Water System | 250 | 16 |
| 5 | Csa No. 31 Stonegate Ws | 230 | 16 |
12 total water systems serve San Benito County.
All ZIP Codes in San Benito County
5 ZIP codes tracked in San Benito County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95075 | Tres Pinos | 75 | B | 0 | $854K |
| 2 | 95043 | Paicines | 68 | C | 4 (1 health) | $1096K |
| 3 | 95024 | Hollister | 67 | C | 8 (4 health) | — |
| 4 | 95045 | San Juan Bautista | 66 | C | 7 (3 health) | $836K |
| 5 | 95023 | Hollister | 60 | C | 8 (4 health) | $741K |
Recommended Buyer Guides for San Benito County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 55% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for San Benito County, California
Overview
San Benito County in California covers 5 ZIP codes with an average Home Safety Score of C (67/100).
4 of 5 ZIP codes have recorded EPA violations. 12 health-based violations have been documented.
← Back to California water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.