Oceana County, Michigan
6 ZIP codes · Avg score 85/100 · Grade A · Updated 2026-06-03
In recent assessments, Oceana County's 6 ZIP codes record strong, consistent water safety outcomes.
How Oceana County Compares
How Oceana County Compares
Oceana County scores 11 points above the Michigan state average (74/100) and 17 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Oceana County, Michigan
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.2 (asthma 11.3%, diabetes 13.7%)
Estimated additional annual cost per homeowner: $920, driven primarily by flood
Infrastructure: 0.373% avg pipe failure probability, 17% of ZIPs at high risk
61.8% 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: $920
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
14,516 housing units in Oceana 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 Oceana County
Remediation costs are relatively manageable for most homeowners in Oceana 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 Oceana 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 Oceana County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Pentwater | 857 | 7 |
| 2 | Hesperia | 954 | 6 |
| 3 | Green Acres Mobile Home Park | 135 | 6 |
| 4 | Hart | 2,126 | 4 |
| 5 | Pere Marquette Twp - Customer | 339 | 3 |
6 total water systems serve Oceana County.
All ZIP Codes in Oceana County
6 ZIP codes tracked in Oceana County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 49455 | Shelby | 99 | A | 0 | $145K |
| 2 | 49421 | Hesperia | 94 | A | 6 (1 health) | $148K |
| 3 | 49420 | Hart | 92 | A | 4 | $153K |
| 4 | 49449 | Pentwater | 92 | A | 3 | $282K |
| 5 | 49446 | New Era | 66 | C | 0 | $192K |
| 6 | 49436 | Mears | 65 | C | 0 | $232K |
Recommended Buyer Guides for Oceana County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Lead Paint Test Kits — 61.8% of homes built before 1978
- 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 Oceana County, Michigan
Overview
Oceana County in Michigan covers 6 ZIP codes with an average Home Safety Score of A (85/100).
3 of 6 ZIP codes have recorded EPA violations. 1 health-based violation 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.