Moody County, South Dakota
6 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-04
Water monitoring across Moody County's 6 ZIP codes paints a mid-range picture — solid compliance in some zones, documented concerns in others; most violations on record are concentrated in specific prior years rather than spread evenly across the full compliance history, and the overall county grade has held steady in the middle tier without major shifts in either direction.
How Moody County Compares
How Moody County Compares
Moody 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: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Moody 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: 13 (asthma 10%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $1,133, driven primarily by flood
Infrastructure: 0.373% avg pipe failure probability, 17% of ZIPs at high risk
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: $1,133
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
13,968 housing units in Moody 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 Moody County
Remediation costs are relatively manageable for most homeowners in Moody 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 Moody 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 Moody County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Big Sioux Community Water System | 5,800 | 7 |
| 2 | Kingbrook I Rural Water System | 6,455 | 6 |
| 3 | Flandreau | 2,372 | 3 |
| 4 | Brookings Municipal Utilities | 23,377 | 2 |
| 5 | University Estates | 150 | 2 |
15 total water systems serve Moody County.
All ZIP Codes in Moody County
6 ZIP codes tracked in Moody County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 57024 | Egan | 70 | B | 1 | $175K |
| 2 | 57017 | Colman | 66 | C | 0 | $261K |
| 3 | 57028 | Flandreau | 64 | C | 2 (1 health) | $175K |
| 4 | 57065 | Trent | 64 | C | 2 | $167K |
| 5 | 57006 | Brookings | 49 | D | 2 | $254K |
| 6 | 57075 | Wentworth | 45 | D | 0 | $430K |
Recommended Buyer Guides for Moody 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 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 Moody County, South Dakota
Overview
Moody County in South Dakota covers 6 ZIP codes with an average Home Safety Score of C (60/100).
4 of 6 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.