Iroquois County, Illinois
23 ZIP codes · Avg score 54/100 · Grade D · Updated 2026-06-03
Compared to state averages, Iroquois County scores below the baseline — health violations appear more frequently than the norm across its 23 ZIP codes.
How Iroquois County Compares
How Iroquois County Compares
Iroquois County scores 7 points below the Illinois state average (61/100) and 14 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Iroquois County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.1 (asthma 10.5%, diabetes 13.9%)
Estimated additional annual cost per homeowner: $1,578, driven primarily by energy_code_gap
Infrastructure: 0.495% avg pipe failure probability, 95% of ZIPs at high risk
84.1% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Iroquois County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 4 violations. Past 5 years: 13 total (13 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: $1,578
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,286 housing units in Iroquois 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 Iroquois 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 Iroquois 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 Iroquois County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Watseka | 5,500 | 18 |
| 2 | Ashkum | 724 | 8 |
| 3 | La Bella of Clifton | 55 | 8 |
| 4 | Woodland | 319 | 8 |
| 5 | Lake Iroquois Association | 500 | 7 |
24 total water systems serve Iroquois County.
All ZIP Codes in Iroquois County
23 ZIP codes tracked in Iroquois County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 60973 | Wellington | 70 | B | 0 | $76K |
| 2 | 60927 | Clifton | 68 | C | 3 (2 health) | $194K |
| 3 | 60938 | Gilman | 68 | C | 2 | $123K |
| 4 | 60955 | Onarga | 67 | C | 4 | $105K |
| 5 | 60918 | Buckley | 66 | C | 0 | $98K |
| 6 | 60928 | Crescent City | 66 | C | 0 | $114K |
| 7 | 60911 | Ashkum | 64 | C | 8 (1 health) | $152K |
| 8 | 60953 | Milford | 62 | C | 7 | $99K |
| 9 | 60931 | Donovan | 61 | C | 7 (3 health) | $112K |
| 10 | 60948 | Loda | 61 | C | 1 (1 health) | $238K |
| 11 | 60924 | Cissna Park | 56 | C | 2 | $148K |
| 12 | 60974 | Woodland | 56 | C | 8 (1 health) | $91K |
| 13 | 60951 | Martinton | 54 | D | 4 | $123K |
| 14 | 60968 | Thawville | 53 | D | 2 | $102K |
| 15 | 60970 | Watseka | 53 | D | 5 (2 health) | $121K |
| 16 | 60966 | Sheldon | 46 | D | 6 | $76K |
| 17 | 60926 | Claytonville | 40 | D | 0 | $46K |
| 18 | 60939 | Goodwine | 40 | D | 0 | — |
| 19 | 60945 | Iroquois | 40 | D | 0 | $95K |
| 20 | 60956 | Papineau | 40 | D | 0 | $87K |
| 21 | 60967 | Stockland | 40 | D | 0 | — |
| 22 | 60912 | Beaverville | 36 | F | 5 (2 health) | $86K |
| 23 | 60930 | Danforth | 28 | F | 4 (1 health) | $150K |
Recommended Buyer Guides for Iroquois County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 84.1% 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 Iroquois County, Illinois
Overview
Iroquois County in Illinois covers 23 ZIP codes with an average Home Safety Score of D (54/100).
15 of 23 ZIP codes have recorded EPA violations. 13 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.
What You Can Do
Iroquois County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
84.1% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.