States › Michigan › Sanilac County

Sanilac County, MI Water Quality

Water quality data for 16 public water systems serving Sanilac County, Michigan — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 16 water systems · 22 cities
✅
Excellent — All Systems Performing Well

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

A

Sanilac County Earns a A

Sanilac County: 22 communities across 16 water systems. 95.5% have no open violations.

  • Median lead where detected: 2.00 ppb
  • 14 communities with a lead detection, 6 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 95.5% of communities have no open violations
2 ppb
Median Lead Level
County-wide, 90th percentile
16
Water Systems
Active CWS & NTNCWS
95%
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
  • Wheatland
    2.00 ppb
    No federal limits exceeded on record
    B
  • Sandusky
    Not detected
    No federal limits exceeded on record
    B
  • Brown City
    2.00 ppb
    No federal limits exceeded on record
    B
  • Lexington
    2.00 ppb
    No federal limits exceeded on record
    B
  • Marion
    2.00 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Buel
    Not reported
    1 violation currently open
    C
  • Croswell
    1.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Delaware
    3.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Minden
    6.00 ppb
    Lead at 6.00 ppb, above a third of the action level
    B
  • Marlette
    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
13
5 – 10 ppb
1
No Data
8

All Cities in Sanilac County

Sandusky Not detected B
Croswell 1.00 ppb B
Marlette 2.00 ppb B
Brown City 2.00 ppb B
Lexington 2.00 ppb B
Marion 2.00 ppb B
Sanilac 3.00 ppb B
Worth 0.30 ppb B
Elk Not reported B
Carsonville Not detected B
Washington Not detected B
Buel Not reported C
Watertown Not detected B
Bridgehampton Not detected B
Minden 6.00 ppb B
Marlette 3.00 ppb B
Custer 1.00 ppb B
Moore 1.00 ppb B
Delaware 3.00 ppb B
Maple Valley 2.00 ppb B
Forester Not detected B
Wheatland 2.00 ppb B
Showing 22 cities
No active violations Active violations

About Sanilac County Drinking Water

Sanilac County is served by 16 water systems covering 22 communities. 96% have no open violations.

Of the communities reporting lead results, 14 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 Sanilac County tap water safe to drink?▼
96% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Sanilac County?▼
Among communities with a detection the median is 2.00 ppb, 13% of the 15 ppb action level. 6 reported none detected and 2 reported no result.
How many water systems serve Sanilac County?▼
16 community water systems serve 22 communities here.
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