McPherson County, South Dakota
3 ZIP codes · Avg score 56/100 · Grade C · Updated 2026-06-04
Across McPherson County, EPA compliance data for 3 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How McPherson County Compares
How McPherson County Compares
McPherson County scores 4 points below the South Dakota state average (60/100) and 12 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
Key Risk Factors
Health risk index: 15.4 (asthma 10%, diabetes 14.8%)
Estimated additional annual cost per homeowner: $670, driven primarily by water_lead
Infrastructure: 0.48% avg pipe failure probability, 100% of ZIPs at high risk
89.3% 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: $670
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,253 housing units in McPherson 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 McPherson County
Remediation costs are relatively manageable for most homeowners in McPherson 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 McPherson County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 3 systems in McPherson County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Web Water Development Association | 20,750 | 5 |
| 2 | Leola | 434 | 4 |
| 3 | Eureka | 813 | 1 |
All ZIP Codes in McPherson County
3 ZIP codes tracked in McPherson County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 57437 | Eureka | 66 | C | 1 | $80K |
| 2 | 57456 | Leola | 61 | C | 4 (1 health) | $72K |
| 3 | 57457 | Long Lake | 40 | D | 0 | $47K |
Recommended Buyer Guides for McPherson County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 89.3% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Overview
McPherson County in South Dakota covers 3 ZIP codes with an average Home Safety Score of C (56/100).
2 of 3 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to South Dakota 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.