States › Michigan › Clinton County

Clinton County, MI Water Quality

Water quality data for 11 public water systems serving Clinton County, Michigan — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 11 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

Clinton County Earns a A

Clinton County: 15 communities across 11 water systems. 93.3% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 10 communities with a lead detection, 4 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 93.3% of communities have no open violations
2 ppb
Median Lead Level
County-wide, 90th percentile
11
Water Systems
Active CWS & NTNCWS
93%
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
  • St. Johns
    1.00 ppb
    No federal limits exceeded on record
    B
  • Bath charter
    Not detected
    No federal limits exceeded on record
    A
  • DeWitt charter
    Not detected
    No federal limits exceeded on record
    A
  • Ovid
    2.00 ppb
    No federal limits exceeded on record
    B
  • Westphalia
    2.00 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Olive
    Not reported
    1 violation currently open
    C
  • DeWitt
    2.00 ppb
    4 health-based violations since 2015
    B
  • Dallas
    1.00 ppb
    Copper above the 1,300 ppb action level
    A
  • Watertown charter
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Eagle
    12.00 ppb
    Lead at 12.00 ppb, above a third of the action level
    B
County Lead Level — Median 2 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2 ppb — 13.3% of the federal action level
Systems by Lead Level
Under 5 ppb
9
10 – 15 ppb
1
No Data
5

All Cities in Clinton County

St. Johns 1.00 ppb B
Bath charter Not detected A
DeWitt charter Not detected A
Ovid 2.00 ppb B
Dallas 1.00 ppb A
Westphalia 2.00 ppb B
Duplain Not detected B
DeWitt 2.00 ppb B
Bingham 1.00 ppb B
Victor 2.00 ppb B
Essex 1.10 ppb B
Eagle 12.00 ppb B
Ovid 2.00 ppb B
Watertown charter Not detected A
Olive Not reported C
Showing 15 cities
No active violations Active violations

About Clinton County Drinking Water

Clinton County is served by 11 water systems covering 15 communities. 93% have no open violations.

Of the communities reporting lead results, 10 recorded a detection, with a median of 2.00 ppb — 13% of the federal action level. 4 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 Clinton County tap water safe to drink?▼
93% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Clinton County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 4 reported none detected and 1 reported no result.
How many water systems serve Clinton County?▼
11 community water systems serve 15 communities here.
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