Winston County, Mississippi
2 ZIP codes · Avg score 88/100 · Grade A · Updated 2026-06-03
Winston County maintains reliable drinking water quality across all 2 of its tracked ZIP codes.
How Winston County Compares
How Winston County Compares
Winston County scores 7 points above the Mississippi state average (81/100) and 20 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 17.2 (asthma 10.3%, diabetes 19.5%)
Estimated additional annual cost per homeowner: $940, driven primarily by flood
Infrastructure: 0.36% avg pipe failure probability
64.5% 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: $940
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,634 housing units in Winston 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 Winston County
Remediation costs are relatively manageable for most homeowners in Winston 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 Winston 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 Winston County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Louisville | 7,545 | 8 |
| 2 | Highpoint Water Association #1 | 2,124 | 8 |
| 3 | Ellison Ridge Water Assn | 1,287 | 8 |
| 4 | Nanih-waiya Water Association | 1,127 | 8 |
| 5 | Town of Noxapater | 1,713 | 8 |
10 total water systems serve Winston County.
All ZIP Codes in Winston County
2 ZIP codes tracked in Winston County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 39346 | Noxapater | 93 | A | 3 | $92K |
| 2 | 39339 | Louisville | 82 | B | 5 | $130K |
Recommended Buyer Guides for Winston County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 64.5% 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
Overview
Winston County in Mississippi covers 2 ZIP codes with an average Home Safety Score of A (88/100).
2 of 2 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Mississippi 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.