Henderson County, Illinois
8 ZIP codes · Avg score 57/100 · Grade C · Updated 2026-06-03
Henderson County: 8 ZIP codes, mid-range safety grade.
How Henderson County Compares
How Henderson County Compares
Henderson County scores 4 points below the Illinois state average (61/100) and 11 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Henderson County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15 (asthma 10.2%, diabetes 13.9%)
Estimated additional annual cost per homeowner: $1,600, driven primarily by flood
Infrastructure: 0.432% avg pipe failure probability, 75% of ZIPs at high risk
75.4% 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: $1,600
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,942 housing units in Henderson 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 Henderson County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Henderson 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 Henderson County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | GLADSTONE | 387 | 5 |
| 2 | Media | 139 | 3 |
| 3 | Oquawka | 1,125 | 3 |
| 4 | Stronghurst | 950 | 3 |
| 5 | Biggsville | 273 | 0 |
6 total water systems serve Henderson County.
All ZIP Codes in Henderson County
8 ZIP codes tracked in Henderson County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 61418 | Biggsville | 70 | B | 0 | $110K |
| 2 | 61460 | Media | 67 | C | 3 | $83K |
| 3 | 61471 | Raritan | 66 | C | 0 | $81K |
| 4 | 61480 | Stronghurst | 64 | C | 3 | $101K |
| 5 | 61469 | Oquawka | 57 | C | 3 | $104K |
| 6 | 61437 | Gladstone | 55 | C | 5 | $139K |
| 7 | 61478 | Smithshire | 40 | D | 0 | $74K |
| 8 | 61425 | Carman | 35 | F | 0 | $88K |
Recommended Buyer Guides for Henderson County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 75.4% 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 Henderson County, Illinois
Overview
Henderson County in Illinois covers 8 ZIP codes with an average Home Safety Score of C (57/100).
4 of 8 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.