Shelby County, Illinois
13 ZIP codes · Avg score 71/100 · Grade B · Updated 2026-06-03
In current tracking cycles, Shelby County — spanning 13 ZIP codes — records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Shelby County Compares
How Shelby County Compares
Shelby County scores 10 points above the Illinois state average (61/100) and 3 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Shelby County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.4 (asthma 10.4%, diabetes 12.9%)
Estimated additional annual cost per homeowner: $815, driven primarily by energy_code_gap
Infrastructure: 0.435% avg pipe failure probability, 54% of ZIPs at high risk
69.8% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↑ Worsening trendEPA violation counts by year across Shelby County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 4 violations. Past 5 years: 8 total (8 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
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: $815
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
9,558 housing units in Shelby 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 Shelby County
Remediation costs are relatively manageable for most homeowners in Shelby 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 Shelby 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 Shelby County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Ej Water Cooperative | 29,720 | 47 |
| 2 | Moweaqua | 1,785 | 14 |
| 3 | Blue Mound | 1,300 | 14 |
| 4 | Windsor | 1,200 | 11 |
| 5 | New Windsor | 740 | 11 |
15 total water systems serve Shelby County.
All ZIP Codes in Shelby County
13 ZIP codes tracked in Shelby County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62462 | Sigel | 83 | B | 0 | $144K |
| 2 | 62565 | Shelbyville | 81 | B | 2 | $132K |
| 3 | 62438 | Lakewood | 80 | B | 4 | $236K |
| 4 | 62422 | Cowden | 79 | B | 1 | $124K |
| 5 | 62571 | Tower Hill | 79 | B | 1 | $144K |
| 6 | 62431 | Herrick | 78 | B | 6 (1 health) | $110K |
| 7 | 62550 | Moweaqua | 78 | B | 14 (2 health) | $134K |
| 8 | 62463 | Stewardson | 72 | B | 1 | $126K |
| 9 | 61957 | Windsor | 68 | C | 11 (2 health) | $127K |
| 10 | 62534 | Findlay | 62 | C | 7 (1 health) | $133K |
| 11 | 62444 | Mode | 53 | D | 0 | $114K |
| 12 | 62461 | Shumway | 53 | D | 0 | $160K |
| 13 | 62553 | Oconee | 53 | D | 0 | $122K |
Recommended Buyer Guides for Shelby County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Lead Paint Test Kits — 69.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Shelby County, Illinois
Overview
Shelby County in Illinois covers 13 ZIP codes with an average Home Safety Score of B (71/100).
9 of 13 ZIP codes have recorded EPA violations. 6 health-based violations have been documented.
← Back to Illinois 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.