Roberts County, South Dakota
9 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-07-19
ZipCheckup grade for Roberts: C.
A mixed picture - some signals here are worth your attention.
Current EPA records place Roberts County in the middle tier for drinking water safety, with 9 ZIP codes showing a range of outcomes.
How Roberts County Compares
How Roberts County Compares
Roberts County scores 0 points above the South Dakota state average (60/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Roberts County, South Dakota
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.2 (asthma 11.4%, diabetes 16.3%)
Estimated additional annual cost per homeowner: $1,248, driven primarily by flood
Infrastructure: 0.448% avg pipe failure probability, 67% of ZIPs at high risk
72% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Roberts County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 3 violations. Past 5 years: 6 total (6 health-based). Health-based violations are declining versus the prior 2-year window.
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: $1,248
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,237 housing units in Roberts 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 Roberts County
Remediation costs are relatively manageable for most homeowners in Roberts 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 Roberts County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Roberts County
8 community water systems serving Roberts County.
- C
- C
- C
- B
- C
- C
12 total water systems serve Roberts County.
Systems with the most violations in Roberts County
2 water systems with recorded EPA violations.
- C
- C
All ZIP Codes in Roberts County
9 ZIP codes tracked in Roberts County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 57262 | Sisseton | 70 | B | 0 | $121K |
| 2 | 57260 | Rosholt | 68 | C | 9 (2 health) | $137K |
| 3 | 57227 | Corona | 66 | C | 3 | $215K |
| 4 | 57255 | New Effington | 66 | C | 0 | $83K |
| 5 | 57279 | Wilmot | 65 | C | 0 | $161K |
| 6 | 57216 | Big Stone City | 64 | C | 2 | $213K |
| 7 | 57266 | Summit | 57 | C | 4 (4 health) | $159K |
| 8 | 57224 | Claire City | 40 | D | 0 | $79K |
| 9 | 57257 | Peever | 40 | D | 0 | $58K |
Recommended Buyer Guides for Roberts County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 72% 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 Roberts County, South Dakota
Overview
Roberts County in South Dakota covers 9 ZIP codes with an average Home Safety Score of C (60/100).
4 of 9 ZIP codes have recorded EPA violations. 6 health-based violations 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.