States › Ohio › Clinton County

Clinton County, OH Water Quality

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

📅 2026 Report 🔄 Data updated 2026 Q2 📍 5 water systems · 5 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

Clinton County Earns a B

Clinton County: 5 communities across 5 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.30 ppb
  • 5 communities with a lead detection, 0 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.3 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
  • Sabina
    3.60 ppb
    1 health-based violation since 2015
    B
  • Wilmington
    0.80 ppb
    Copper above the 1,300 ppb action level
    A
  • New Vienna
    1.80 ppb
    Copper above the 1,300 ppb action level
    B
  • Blanchester
    1.20 ppb
    Copper above the 1,300 ppb action level
    B
  • Clarksville
    1.30 ppb
    PFAS above the limit at 2 of 2 sampling points
    D
⚠ Needs Attention
  • Clarksville
    1.30 ppb
    PFAS above the limit at 2 of 2 sampling points
    D
  • Blanchester
    1.20 ppb
    Copper above the 1,300 ppb action level
    B
  • Wilmington
    0.80 ppb
    Copper above the 1,300 ppb action level
    A
  • New Vienna
    1.80 ppb
    Copper above the 1,300 ppb action level
    B
  • Sabina
    3.60 ppb
    1 health-based violation since 2015
    B
County Lead Level — Median 1.3 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.3 ppb — 8.7% of the federal action level
Systems by Lead Level
Under 5 ppb
5

All Cities in Clinton County

Wilmington 0.80 ppb A
Blanchester 1.20 ppb B
Sabina 3.60 ppb B
New Vienna 1.80 ppb B
Clarksville 1.30 ppb D
Showing 5 cities
No active violations Active violations

About Clinton County Drinking Water

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

Of the communities reporting lead results, 5 recorded a detection, with a median of 1.30 ppb — 9% of the federal action level. 0 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 5 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 Clinton County tap water safe to drink?▼
No community in Clinton County has an open violation on record. 1 of 5 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Clinton County?▼
Among communities with a detection the median is 1.30 ppb, 9% of the 15 ppb action level. 0 reported none detected and 0 reported no result.
How many water systems serve Clinton County?▼
5 community water systems serve 5 communities here.
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