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San Benito County, CA Water Quality

Water quality data for 4 public water systems serving San Benito County, California — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 4 water systems · 4 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

San Benito County Earns a B

San Benito County: 4 communities across 4 water systems. 75.0% have no open violations.

  • Median lead where detected: 2.30 ppb
  • 1 communities with a lead detection, 3 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 75.0% of communities have no open violations
2.3 ppb
Median Lead Level
County-wide, 90th percentile
4
Water Systems
Active CWS & NTNCWS
75%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Ridgemark
    Not detected
    No federal limits exceeded on record
    B
  • Tres Pinos
    Not detected
    No federal limits exceeded on record
    B
  • Hollister
    2.30 ppb
    5 health-based violations since 2015
    B
  • San Juan Bautista
    Not detected
    1 violation currently open
    D
⚠ Needs Attention
  • San Juan Bautista
    Not detected
    1 violation currently open
    D
  • Hollister
    2.30 ppb
    5 health-based violations since 2015
    B
  • Ridgemark
    Not detected
    No federal limits exceeded on record
    B
  • Tres Pinos
    Not detected
    No federal limits exceeded on record
    B
County Lead Level — Median 2.3 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.3 ppb — 15.3% of the federal action level
Systems by Lead Level
Under 5 ppb
1
No Data
3

All Cities in San Benito County

Hollister 2.30 ppb B
Ridgemark Not detected B
San Juan Bautista Not detected D
Tres Pinos Not detected B
Showing 4 cities
No active violations Active violations

About San Benito County Drinking Water

San Benito County is served by 4 water systems covering 4 communities. 75% have no open violations.

Of the communities reporting lead results, 1 recorded a detection, with a median of 2.30 ppb — 15% of the federal action level. 3 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is San Benito County tap water safe to drink?▼
75% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in San Benito County?▼
Among communities with a detection the median is 2.30 ppb, 15% of the 15 ppb action level. 3 reported none detected and 0 reported no result.
How many water systems serve San Benito County?▼
4 community water systems serve 4 communities here.
← Back to California water quality overview