Winona County, Minnesota
8 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Across Winona County's 8 ZIP codes, water safety results are uneven — a portion of systems carry active or recent violations, while others meet standards without issues.
How Winona County Compares
How Winona County Compares
Winona County scores 1 points above the Minnesota state average (62/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Winona County, Minnesota
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 10.3%, diabetes 9.8%)
Estimated additional annual cost per homeowner: $1,068, driven primarily by flood
Infrastructure: 0.388% avg pipe failure probability, 33% of ZIPs at high risk
63.5% 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: $1,068
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
18,638 housing units in Winona 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 Winona County
Remediation costs are relatively manageable for most homeowners in Winona 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 Winona 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 Winona County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Winona | 27,782 | 9 |
| 2 | Goodview | 4,158 | 9 |
| 3 | Stockton | 697 | 9 |
| 4 | Green Terrace Mobile Estates | 86 | 5 |
| 5 | Hidden Valley Mobile Home Park | 464 | 4 |
10 total water systems serve Winona County.
All ZIP Codes in Winona County
8 ZIP codes tracked in Winona County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 55969 | Rollingstone | 70 | B | 0 | $260K |
| 2 | 55979 | Utica | 66 | C | 1 | $250K |
| 3 | 55910 | Altura | 65 | C | 0 | $238K |
| 4 | 55959 | Minnesota City | 65 | C | 4 | $204K |
| 5 | 55988 | Stockton | 65 | C | 0 | — |
| 6 | 55952 | Lewiston | 62 | C | 0 | $229K |
| 7 | 55987 | Winona | 57 | C | 5 (3 health) | $211K |
| 8 | 55942 | Homer | 53 | D | 0 | — |
Recommended Buyer Guides for Winona County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Lead Paint Test Kits — 63.5% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- 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 Winona County, Minnesota
Overview
Winona County in Minnesota covers 8 ZIP codes with an average Home Safety Score of C (63/100).
3 of 8 ZIP codes have recorded EPA violations. 3 health-based violations have been documented.
← Back to Minnesota 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.