Mackinac County, Michigan
6 ZIP codes · Avg score 79/100 · Grade B · Updated 2026-06-03
Covering 6 ZIP codes, Mackinac County earns a high grade for tap water — most systems report zero health-based violations, and the overall compliance rate comfortably exceeds federal benchmarks.
How Mackinac County Compares
How Mackinac County Compares
Mackinac County scores 5 points above the Michigan state average (74/100) and 11 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Mackinac County, Michigan
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.6 (asthma 11.9%, diabetes 16%)
Estimated additional annual cost per homeowner: $635, driven primarily by energy_code_gap
Infrastructure: 0.378% avg pipe failure probability, 33% of ZIPs at high risk
64.8% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $635
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,106 housing units in Mackinac County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Mackinac County
Remediation costs are relatively manageable for most homeowners in Mackinac County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Mackinac County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 3 systems in Mackinac County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Mack. Company Housing-curtis | 50 | 13 |
| 2 | Mack. Company Housing-engadine | 50 | 13 |
| 3 | Mackinac Island | 583 | 1 |
All ZIP Codes in Mackinac County
6 ZIP codes tracked in Mackinac County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 49757 | Mackinac Island | 99 | A | 1 | $835K |
| 2 | 49820 | Curtis | 97 | A | 13 (2 health) | $105K |
| 3 | 49781 | Saint Ignace | 73 | B | 0 | $150K |
| 4 | 49853 | Mc Millan | 73 | B | 0 | $190K |
| 5 | 49827 | Engadine | 66 | C | 0 | $118K |
| 6 | 49838 | Gould City | 66 | C | 0 | $169K |
Recommended Buyer Guides for Mackinac County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Lead Paint Test Kits — 64.8% of homes built before 1978
Deep Dive Reports
Detailed analysis for Mackinac County, Michigan
Overview
Mackinac County in Michigan covers 6 ZIP codes with an average Home Safety Score of B (79/100).
2 of 6 ZIP codes have recorded EPA violations. 2 health-based violations have been documented.
← Back to Michigan water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.