St. Clair County, Michigan
20 ZIP codes · Avg score 98/100 · Grade A
ZipCheckup grade for St. Clair County: A.
Checked records flag no major concern; missing data is unknown.
High on the scale: St. Clair County (20 ZIP codes).
How St. Clair County Compares
How St. Clair County Compares
St. Clair County scores 13 points above the Michigan state average (85/100) and 25 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: St. Clair County, Michigan
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.4 (asthma 11.7%, diabetes 12.2%)
Modeled additional annual cost estimate per homeowner: $1,270, largest modeled factor: Flood
59% of homes built before 1980 (lead paint was banned for residential use in 1978)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,270
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
67,746 housing units in St. Clair 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 St. Clair County
Modeled remediation costs in St. Clair County can be compared with the median property value; actual costs vary by property.
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 St. Clair County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to St. Clair County ZIP codes
8 community water systems mapped to St. Clair County ZIP codes; EPA may list more systems serving the county.
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Show all 8 water systems
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20 water systems mapped to St. Clair County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in St. Clair County
5 water systems with violations in EPA records.
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All ZIP Codes in St. Clair County
20 ZIP codes tracked in St. Clair County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 48023 | Fair Haven | 100 | A | 0 | $237K |
| 2 | 48040 | Marysville | 100 | A | 0 | $186K |
| 3 | 48001 | Algonac | 99 | A | 2 | $250K |
| 4 | 48039 | Marine City | 98 | A | 4 (1 health) | $171K |
| 5 | 48049 | North Street | 98 | A | 3 | $226K |
| 6 | 48059 | Fort Gratiot | 98 | A | 5 | $199K |
| 7 | 48060 | Port Huron | 98 | A | 3 | $152K |
| 8 | 48079 | Saint Clair | 98 | A | 5 (1 health) | $277K |
| 9 | 48074 | Smiths Creek | 93 | A | 14 | $192K |
| 10 | 48002 | Allenton | — | — | $295K | |
| 11 | 48004 | Anchorville | — | — | — | |
| 12 | 48006 | Avoca | — | — | $226K | |
| 13 | 48014 | Capac | — | — | 6 | $208K |
| 14 | 48027 | Goodells | — | — | $243K | |
| 15 | 48028 | Harsens Island | — | — | $339K | |
| 16 | 48041 | Memphis | — | — | 0 | $296K |
| 17 | 48061 | Port Huron | — | — | — | |
| 18 | 48063 | Columbus | — | — | 0 | $298K |
| 19 | 48064 | Casco | — | — | $280K | |
| 20 | 48097 | Yale | — | — | 7 (1 health) | $175K |
Recommended Buyer Guides for St. Clair County
The guides listed here are chosen from this county's data, and the short note beside each one says why it made the list.
- Best Lead Paint Test Kits — 59% of homes built before 1980
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for St. Clair County, Michigan
Overview
St. Clair County in Michigan covers 20 tracked ZIP records with an average Home Safety Score of A (98/100) across 9 scored records.
9 of 13 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 3 health-based violations appear in the available health breakdown.
← Back to Michigan Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.