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Yuba County, CA Water Quality

Water quality data for 9 public water systems serving Yuba County, California — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 9 water systems · 11 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Yuba County Earns a A

Yuba County: 11 communities across 9 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.06 ppb
  • 6 communities with a lead detection, 5 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2.06 ppb
Median Lead Level
County-wide, 90th percentile
9
Water Systems
Active CWS & NTNCWS
100%
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
  • Linda
    1.69 ppb
    No federal limits exceeded on record
    A
  • Olivehurst
    Not detected
    No federal limits exceeded on record
    A
  • Marysville
    Not detected
    No federal limits exceeded on record
    A
  • Plumas Lake
    Not detected
    No federal limits exceeded on record
    A
  • Challenge-Brownsville
    2.43 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Wheatland
    0.65 ppb
    PFAS above the limit at 1 of 5 sampling points
    C
  • Beale AFB
    Not detected
    1 health-based violation since 2015
    A
  • Linda
    1.69 ppb
    No federal limits exceeded on record
    A
  • Olivehurst
    Not detected
    No federal limits exceeded on record
    A
  • Marysville
    Not detected
    No federal limits exceeded on record
    A
County Lead Level — Median 2.06 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.06 ppb — 13.7% of the federal action level
Systems by Lead Level
Under 5 ppb
6
No Data
5

All Cities in Yuba County

Linda 1.69 ppb A
Olivehurst Not detected A
Marysville Not detected A
Plumas Lake Not detected A
Beale AFB Not detected A
Challenge-Brownsville 2.43 ppb B
Wheatland 0.65 ppb C
Loma Rica 2.43 ppb B
Dobbins 2.43 ppb B
Camptonville 0.40 ppb B
Smartsville Not detected B
Showing 11 cities
No active violations Active violations

About Yuba County Drinking Water

Yuba County is served by 9 water systems covering 11 communities. No community here has an open violation on record.

Of the communities reporting lead results, 6 recorded a detection, with a median of 2.06 ppb — 14% of the federal action level. 5 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 11 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Yuba County tap water safe to drink?▼
No community in Yuba County has an open violation on record. 1 of 11 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Yuba County?▼
Among communities with a detection the median is 2.06 ppb, 14% of the 15 ppb action level. 5 reported none detected and 0 reported no result.
How many water systems serve Yuba County?▼
9 community water systems serve 11 communities here.
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