Isabella County, Michigan
7 ZIP codes · Avg score 90/100 · Grade A · Updated 2026-06-03
For households in Isabella County, the 7 ZIP codes on record show consistently safe tap water.
How Isabella County Compares
How Isabella County Compares
Isabella County scores 16 points above the Michigan state average (74/100) and 22 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Isabella County, Michigan
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.2 (asthma 12.2%, diabetes 10.5%)
Estimated additional annual cost per homeowner: $1,003, driven primarily by flood
Infrastructure: 0.396% avg pipe failure probability, 43% of ZIPs at high risk
73.2% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Isabella County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 5 violations. Past 5 years: 7 total (7 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $1,003
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
25,795 housing units in Isabella 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 Isabella County
Remediation costs are relatively manageable for most homeowners in Isabella 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 Isabella County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Isabella County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Mount Pleasant | 21,688 | 16 |
| 2 | Shepherd, Village of | 1,515 | 12 |
| 3 | Broomfield Valley | 212 | 10 |
| 4 | Maple Leaf Village | 50 | 10 |
| 5 | Rosebush Manor | 25 | 0 |
6 total water systems serve Isabella County.
All ZIP Codes in Isabella County
7 ZIP codes tracked in Isabella County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 48804 | Mount Pleasant | 98 | A | 2 (1 health) | — |
| 2 | 48859 | Mount Pleasant | 98 | A | 2 (1 health) | — |
| 3 | 48893 | Weidman | 95 | A | 0 | $171K |
| 4 | 48878 | Rosebush | 93 | A | 0 | $139K |
| 5 | 48883 | Shepherd | 92 | A | 10 (1 health) | $155K |
| 6 | 48858 | Mount Pleasant | 89 | A | 2 (1 health) | $168K |
| 7 | 48896 | Winn | 66 | C | 0 | $179K |
Recommended Buyer Guides for Isabella County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 73.2% of homes built before 1978
- 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 Isabella County, Michigan
Overview
Isabella County in Michigan covers 7 ZIP codes with an average Home Safety Score of A (90/100).
4 of 7 ZIP codes have recorded EPA violations. 4 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.