States › Michigan › Hillsdale County

Hillsdale County, MI Water Quality

Water quality data for 11 public water systems serving Hillsdale 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 · 16 cities
✅
Excellent — All Systems Performing Well

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

A

Hillsdale County Earns a A

Hillsdale County: 16 communities across 11 water systems. 93.8% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 10 communities with a lead detection, 6 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 93.8% 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
  • Pittsford
    Not detected
    No federal limits exceeded on record
    B
  • Reading
    2.50 ppb
    No federal limits exceeded on record
    B
  • Jonesville
    3.00 ppb
    No federal limits exceeded on record
    B
  • Somerset
    Not detected
    No federal limits exceeded on record
    B
  • Litchfield
    Not detected
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Adams
    1.00 ppb
    1 violation currently open
    C
  • Hillsdale
    2.00 ppb
    2 health-based violations since 2015
    A
  • Hillsdale
    2.00 ppb
    2 health-based violations since 2015
    A
  • Jefferson
    2.00 ppb
    1 health-based violation since 2015
    B
  • Pittsford
    2.00 ppb
    1 health-based violation since 2015
    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
10
No Data
6

All Cities in Hillsdale County

Hillsdale 2.00 ppb A
Jonesville 3.00 ppb B
Somerset Not detected B
Litchfield Not detected B
Reading 2.50 ppb B
Wright Not detected B
Camden 1.00 ppb B
Hillsdale 2.00 ppb A
Jefferson 2.00 ppb B
Pittsford 2.00 ppb B
Cambria 2.00 ppb A
Fayette Not detected B
Litchfield Not detected B
Adams 1.00 ppb C
Reading 2.50 ppb B
Pittsford Not detected B
Showing 16 cities
No active violations Active violations

About Hillsdale County Drinking Water

Hillsdale County is served by 11 water systems covering 16 communities. 94% 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. 6 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 Hillsdale County tap water safe to drink?▼
94% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Hillsdale County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 6 reported none detected and 0 reported no result.
How many water systems serve Hillsdale County?▼
11 community water systems serve 16 communities here.
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