States › California › El Dorado County

El Dorado County, CA Water Quality

Water quality data for 5 public water systems serving El Dorado County, California — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 5 water systems · 15 cities
✅
Excellent — All Systems Performing Well

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

A

El Dorado County Earns a A

El Dorado County: 15 communities across 5 water systems. 100.0% have no open violations.

  • Median lead where detected: 4.40 ppb
  • 1 communities with a lead detection, 14 reporting none detected
  • 2 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
4.4 ppb
Median Lead Level
County-wide, 90th percentile
5
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
  • El Dorado Hills
    Not detected
    No federal limits exceeded on record
    A
  • Cameron Park
    Not detected
    No federal limits exceeded on record
    A
  • Diamond Springs
    Not detected
    No federal limits exceeded on record
    A
  • Pollock Pines
    Not detected
    No federal limits exceeded on record
    A
  • Placerville
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • South Lake Tahoe
    Not detected
    PFAS above the limit at 1 of 13 sampling points
    C
  • Meyers
    Not detected
    PFAS above the limit at 1 of 13 sampling points
    C
  • El Dorado Hills
    Not detected
    No federal limits exceeded on record
    A
  • Cameron Park
    Not detected
    No federal limits exceeded on record
    A
  • Diamond Springs
    Not detected
    No federal limits exceeded on record
    A
County Lead Level — Median 4.4 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 4.4 ppb — 29.3% of the federal action level
Systems by Lead Level
Under 5 ppb
1
No Data
14

All Cities in El Dorado County

El Dorado Hills Not detected A
South Lake Tahoe Not detected C
Cameron Park Not detected A
Diamond Springs Not detected A
Pollock Pines Not detected A
Placerville Not detected A
Shingle Springs Not detected A
Auburn Lake Trails Not detected A
Georgetown Not detected A
Meyers Not detected C
Camino Not detected A
Grizzly Flats Not detected B
Cold Springs Not detected A
Tahoma 4.40 ppb A
Coloma Not detected A
Showing 15 cities
No active violations Active violations

About El Dorado County Drinking Water

El Dorado County is served by 5 water systems covering 15 communities. No community here has an open violation on record.

Of the communities reporting lead results, 1 recorded a detection, with a median of 4.40 ppb — 29% of the federal action level. 14 reported none detected, which means below the laboratory limit rather than an absence of lead.

2 of 15 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 El Dorado County tap water safe to drink?▼
No community in El Dorado County has an open violation on record. 2 of 15 have PFAS above the federal limit, which is the main open concern.
What is the lead level in El Dorado County?▼
Among communities with a detection the median is 4.40 ppb, 29% of the 15 ppb action level. 14 reported none detected and 0 reported no result.
How many water systems serve El Dorado County?▼
5 community water systems serve 15 communities here.
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