Edmunds County, South Dakota
4 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-04
Edmunds County shows moderate water quality across its 4 ZIP codes — some areas carry violations worth monitoring.
How Edmunds County Compares
How Edmunds County Compares
Edmunds County scores 7 points above the South Dakota state average (60/100) and 1 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
Key Risk Factors
Health risk index: 13.7 (asthma 9.9%, diabetes 12.4%)
Estimated additional annual cost per homeowner: $600, driven primarily by water_lead
Infrastructure: 0.425% avg pipe failure probability, 50% of ZIPs at high risk
78.8% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Edmunds County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 1 violation. Past 5 years: 2 total (2 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: $600
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,932 housing units in Edmunds 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 Edmunds County
Remediation costs are relatively manageable for most homeowners in Edmunds 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 Edmunds 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 Edmunds County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Web Water Development Association | 20,750 | 5 |
| 2 | Ipswich | 928 | 3 |
| 3 | Deerfield Colony | 150 | 3 |
| 4 | Hosmer | 164 | 2 |
| 5 | Boulder Colony | 26 | 2 |
7 total water systems serve Edmunds County.
All ZIP Codes in Edmunds County
4 ZIP codes tracked in Edmunds County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 57471 | Roscoe | 70 | B | 0 | $78K |
| 2 | 57451 | Ipswich | 69 | C | 3 | $221K |
| 3 | 57428 | Bowdle | 66 | C | 0 | $114K |
| 4 | 57448 | Hosmer | 61 | C | 2 (1 health) | $57K |
Recommended Buyer Guides for Edmunds County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Lead Paint Test Kits — 78.8% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Overview
Edmunds County in South Dakota covers 4 ZIP codes with an average Home Safety Score of C (67/100).
2 of 4 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.