Charles Mix County, South Dakota
6 ZIP codes · Avg score 56/100 · Grade C · Updated 2026-06-04
Unlike top-rated counties, Charles Mix County's 6 ZIP codes carry a fair number of documented violations — chlorine compliance and disinfection byproduct limits are the categories most often cited in recent data.
How Charles Mix County Compares
How Charles Mix County Compares
Charles Mix 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
ZIP Code Risk Map
Water Quality Map: Charles Mix 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: 15.6 (asthma 11.3%, diabetes 15.3%)
Estimated additional annual cost per homeowner: $530, driven primarily by water_lead
Infrastructure: 0.397% avg pipe failure probability, 50% of ZIPs at high risk
73.7% 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: $530
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,587 housing units in Charles Mix 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 Charles Mix County
Remediation costs are relatively manageable for most homeowners in Charles Mix 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 Charles Mix 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 Charles Mix County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | RANDALL COMMUNITY WATER DISTRICT | 6,248 | 3 |
| 2 | Lake Andes | 710 | 2 |
| 3 | Lakeview Colony | 118 | 2 |
| 4 | Aurora-brule Rural Water System | 2,750 | 1 |
| 5 | Platte | 1,256 | 1 |
7 total water systems serve Charles Mix County.
All ZIP Codes in Charles Mix County
6 ZIP codes tracked in Charles Mix County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 57356 | Lake Andes | 66 | C | 2 | $114K |
| 2 | 57367 | Pickstown | 66 | C | 0 | $275K |
| 3 | 57380 | Wagner | 66 | C | 0 | $154K |
| 4 | 57361 | Marty | 53 | D | 0 | — |
| 5 | 57369 | Platte | 45 | D | 1 | $226K |
| 6 | 57342 | Geddes | 40 | D | 0 | $117K |
Recommended Buyer Guides for Charles Mix County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 73.7% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Charles Mix County, South Dakota
Overview
Charles Mix County in South Dakota covers 6 ZIP codes with an average Home Safety Score of C (56/100).
2 of 6 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.