States › Ohio › Clermont County

Clermont County, OH Water Quality

Water quality data for 8 public water systems serving Clermont County, Ohio — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 8 water systems · 20 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Clermont County Earns a C

Clermont County: 20 communities across 8 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.10 ppb
  • 14 communities with a lead detection, 6 reporting none detected
  • 14 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2.1 ppb
Median Lead Level
County-wide, 90th percentile
8
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
  • Moscow
    Not detected
    No federal limits exceeded on record
    A
  • Neville
    Not detected
    No federal limits exceeded on record
    A
  • Chilo
    Not detected
    No federal limits exceeded on record
    A
  • New Richmond
    Not detected
    Copper above the 1,300 ppb action level
    B
  • Felicity
    Not detected
    Copper above the 1,300 ppb action level
    A
⚠ Needs Attention
  • Marathon
    1.30 ppb
    PFAS above the limit at 2 of 2 sampling points
    D
  • Amelia
    2.10 ppb
    PFAS above the limit at 1 of 3 sampling points
    C
  • Withamsville
    2.10 ppb
    PFAS above the limit at 1 of 3 sampling points
    C
  • Summerside
    2.10 ppb
    PFAS above the limit at 1 of 3 sampling points
    C
  • Mount Carmel
    2.10 ppb
    PFAS above the limit at 1 of 3 sampling points
    C
County Lead Level — Median 2.1 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.1 ppb — 14% of the federal action level
Systems by Lead Level
Under 5 ppb
14
No Data
6

All Cities in Clermont County

Amelia 2.10 ppb C
Withamsville 2.10 ppb C
Summerside 2.10 ppb C
Milford Not detected C
Mount Carmel 2.10 ppb C
Mount Repose 2.10 ppb C
Mulberry 2.10 ppb C
Day Heights 2.10 ppb C
Bethel 3.60 ppb C
New Richmond Not detected B
Williamsburg 2.60 ppb B
Owensville 2.10 ppb C
Goshen 2.10 ppb C
Felicity Not detected A
Miamiville 2.10 ppb C
Marathon 1.30 ppb D
Moscow Not detected A
Neville Not detected A
Chilo Not detected A
Batavia 2.10 ppb C
Showing 20 cities
No active violations Active violations

About Clermont County Drinking Water

Clermont County is served by 8 water systems covering 20 communities. No community here has an open violation on record.

Of the communities reporting lead results, 14 recorded a detection, with a median of 2.10 ppb — 14% of the federal action level. 6 reported none detected, which means below the laboratory limit rather than an absence of lead.

14 of 20 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 Clermont County tap water safe to drink?▼
No community in Clermont County has an open violation on record. 14 of 20 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Clermont County?▼
Among communities with a detection the median is 2.10 ppb, 14% of the 15 ppb action level. 6 reported none detected and 0 reported no result.
How many water systems serve Clermont County?▼
8 community water systems serve 20 communities here.
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