Richland County, Illinois
8 ZIP codes · Avg score 72/100 · Grade B · Updated 2026-06-03
Compared to state averages, Richland County scores well — its 8 ZIP codes sit above the baseline for tap water quality.
How Richland County Compares
How Richland County Compares
Richland County scores 11 points above the Illinois state average (61/100) and 4 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Richland 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 10.5%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $894, driven primarily by energy_code_gap
Infrastructure: 0.406% avg pipe failure probability, 63% of ZIPs at high risk
64.8% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Richland County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 4 violations. Past 5 years: 5 total (5 health-based).
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: $894
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,797 housing units in Richland 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 Richland County
Remediation costs are relatively manageable for most homeowners in Richland 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 Richland 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 Richland County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Ej Water Cooperative | 29,720 | 119 |
| 2 | Olney | 8,877 | 116 |
| 3 | Acorn Acres Mhp | 52 | 114 |
| 4 | West Liberty-dundas Water District | 484 | 3 |
| 5 | NOBLE | 805 | 2 |
8 total water systems serve Richland County.
All ZIP Codes in Richland County
8 ZIP codes tracked in Richland County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62452 | Parkersburg | 83 | B | 0 | $57K |
| 2 | 62425 | Dundas | 82 | B | 3 (1 health) | $108K |
| 3 | 62450 | Olney | 82 | B | 114 (1 health) | $112K |
| 4 | 62868 | Noble | 79 | B | 2 (1 health) | $99K |
| 5 | 62421 | Claremont | 72 | B | 0 | $66K |
| 6 | 62419 | Calhoun | 70 | B | 0 | $90K |
| 7 | 62434 | Ingraham | 53 | D | 0 | $173K |
| 8 | 62475 | West Liberty | 53 | D | 0 | $179K |
Recommended Buyer Guides for Richland County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 64.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Richland County, Illinois
Overview
Richland County in Illinois covers 8 ZIP codes with an average Home Safety Score of B (72/100).
3 of 8 ZIP codes have recorded EPA violations. 3 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.