States › Michigan › Isabella County

Isabella County, MI Water Quality

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

📅 2026 Report 🔄 Data updated 2026 Q2 📍 8 water systems · 11 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

Isabella County Earns a B

Isabella County: 11 communities across 8 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 7 communities with a lead detection, 2 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 1 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2 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
  • Wise
    2.00 ppb
    No federal limits exceeded on record
    B
  • Isabella
    Not detected
    No federal limits exceeded on record
    B
  • Coe
    Not reported
    1 health-based violation since 2015
    B
  • Rolland
    Not reported
    2 health-based violations since 2015
    B
  • Vernon
    1.40 ppb
    Copper above the 1,300 ppb action level
    B
⚠ Needs Attention
  • Lake Isabella
    41.00 ppb
    Lead above the 15 ppb action level
    C
  • Sherman
    41.00 ppb
    Lead above the 15 ppb action level
    C
  • Broomfield
    41.00 ppb
    Lead above the 15 ppb action level
    C
  • Chippewa
    Not detected
    3 significant inspection deficiencies
    B
  • Mount Pleasant
    1.40 ppb
    Copper above the 1,300 ppb 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
4
10 – 15 ppb
3
No Data
4

All Cities in Isabella County

Mount Pleasant 1.40 ppb B
Union charter 1.40 ppb B
Coe Not reported B
Lake Isabella 41.00 ppb C
Chippewa Not detected B
Sherman 41.00 ppb C
Broomfield 41.00 ppb C
Rolland Not reported B
Isabella Not detected B
Vernon 1.40 ppb B
Wise 2.00 ppb B
Showing 11 cities
No active violations Active violations

About Isabella County Drinking Water

Isabella County is served by 8 water systems covering 11 communities. No community here has an open violation on record.

Of the communities reporting lead results, 7 recorded a detection, with a median of 2.00 ppb — 13% of the federal action level. 2 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 significant deficiencies at 1 of them.

Frequently Asked Questions

Is Isabella County tap water safe to drink?▼
No community in Isabella County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Isabella County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 2 reported none detected and 2 reported no result.
How many water systems serve Isabella County?▼
8 community water systems serve 11 communities here.
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