Aurora County, South Dakota
4 ZIP codes · Avg score 61/100 · Grade C · Updated 2026-06-04
In recent monitoring cycles, Aurora County's 4 ZIP codes show a split record — several have documented water safety violations.
How Aurora County Compares
How Aurora County Compares
Aurora County scores 1 points above the South Dakota state average (60/100) and 7 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
Key Risk Factors
Health risk index: 13.8 (asthma 10%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $550, driven primarily by water_lead
Infrastructure: 0.44% avg pipe failure probability, 50% of ZIPs at high risk
80.5% 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: $550
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,177 housing units in Aurora 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 Aurora County
Remediation costs are relatively manageable for most homeowners in Aurora 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 Aurora 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 Aurora County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Mid-dakota Rural Water | 11,833 | 1 |
| 2 | Davison Rural Water System Inc. | 3,485 | 1 |
| 3 | Aurora-brule Rural Water System | 2,750 | 1 |
| 4 | White Lake | 359 | 1 |
| 5 | STICKNEY | 321 | 0 |
6 total water systems serve Aurora County.
All ZIP Codes in Aurora County
4 ZIP codes tracked in Aurora County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 57368 | Plankinton | 70 | B | 0 | $143K |
| 2 | 57375 | Stickney | 66 | C | 0 | $143K |
| 3 | 57383 | White Lake | 66 | C | 1 | $106K |
| 4 | 57364 | New Holland | 40 | D | 0 | — |
Recommended Buyer Guides for Aurora County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 80.5% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Overview
Aurora County in South Dakota covers 4 ZIP codes with an average Home Safety Score of C (61/100).
1 of 4 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.