Henry County, Illinois
14 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-03
Tracking 14 ZIP codes in Henry County reveals a mixed picture — tap water quality varies meaningfully by location.
How Henry County Compares
How Henry County Compares
Henry County scores 3 points below the Illinois state average (61/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Henry County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.5 (asthma 10.2%, diabetes 11.9%)
Estimated additional annual cost per homeowner: $1,357, driven primarily by energy_code_gap
Infrastructure: 0.485% avg pipe failure probability, 86% of ZIPs at high risk
83.4% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Henry County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 4 violations. Past 5 years: 7 total (7 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: $1,357
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
20,973 housing units in Henry 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 Henry County
Remediation costs are relatively manageable for most homeowners in Henry 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 Henry 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 Henry County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Wolf Ridge Well Corporation | 95 | 15 |
| 2 | Orion | 1,754 | 13 |
| 3 | Cambridge | 2,086 | 12 |
| 4 | Sunny Hill Estates Subdivision | 375 | 10 |
| 5 | Alpha | 626 | 10 |
26 total water systems serve Henry County.
All ZIP Codes in Henry County
14 ZIP codes tracked in Henry County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 61238 | Cambridge | 70 | B | 0 | $130K |
| 2 | 61273 | Orion | 66 | C | 10 (1 health) | $171K |
| 3 | 61419 | Bishop Hill | 66 | C | 0 | $96K |
| 4 | 61233 | Andover | 64 | C | 1 | $173K |
| 5 | 61234 | Annawan | 64 | C | 1 | $151K |
| 6 | 61434 | Galva | 64 | C | 1 | $87K |
| 7 | 61274 | Osco | 62 | C | 2 | $131K |
| 8 | 61443 | Kewanee | 62 | C | 3 | $76K |
| 9 | 61254 | Geneseo | 61 | C | 7 (1 health) | $218K |
| 10 | 61241 | Colona | 56 | C | 8 (1 health) | $167K |
| 11 | 61490 | Woodhull | 55 | C | 0 | $145K |
| 12 | 61413 | Alpha | 51 | D | 10 (2 health) | $128K |
| 13 | 61468 | Ophiem | 40 | D | 0 | $95K |
| 14 | 61262 | Lynn Center | 27 | F | 3 | $246K |
Recommended Buyer Guides for Henry 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 Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 83.4% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Henry County, Illinois
Overview
Henry County in Illinois covers 14 ZIP codes with an average Home Safety Score of C (58/100).
10 of 14 ZIP codes have recorded EPA violations. 5 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.