Lee County, Illinois
16 ZIP codes · Avg score 53/100 · Grade D · Updated 2026-06-03
Water systems serving Lee County's 16 ZIP codes record elevated violation rates — residents in affected areas may want to verify their local system's current status.
How Lee County Compares
How Lee County Compares
Lee County scores 8 points below the Illinois state average (61/100) and 15 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Lee County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.1 (asthma 10.2%, diabetes 12.8%)
Estimated additional annual cost per homeowner: $1,491, driven primarily by energy_code_gap
Infrastructure: 0.509% avg pipe failure probability, 100% of ZIPs at high risk
81.4% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↓ Improving trendEPA violation counts by year across Lee County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 5 violations. Past 5 years: 11 total (11 health-based). Health-based violations are declining versus the prior 2-year window.
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: $1,491
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
15,616 housing units in Lee 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 Lee County
Remediation costs are relatively manageable for most homeowners in Lee 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 Lee 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 Lee County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Harmon | 111 | 12 |
| 2 | Lost Lake Utility District | 704 | 11 |
| 3 | Compton | 279 | 10 |
| 4 | Ashton | 967 | 6 |
| 5 | Dixon | 15,096 | 5 |
19 total water systems serve Lee County.
All ZIP Codes in Lee County
16 ZIP codes tracked in Lee County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 61042 | Harmon | 69 | C | 12 (1 health) | $124K |
| 2 | 60553 | Steward | 66 | C | 4 (1 health) | $173K |
| 3 | 61353 | Paw Paw | 66 | C | 0 | $164K |
| 4 | 60530 | Lee | 65 | C | 4 (1 health) | $276K |
| 5 | 61006 | Ashton | 62 | C | 6 | $151K |
| 6 | 61367 | Sublette | 62 | C | 2 | $185K |
| 7 | 61310 | Amboy | 57 | C | 0 | $174K |
| 8 | 61318 | Compton | 56 | C | 10 (8 health) | $103K |
| 9 | 61021 | Dixon | 55 | C | 5 | $145K |
| 10 | 61057 | Nachusa | 53 | D | 0 | — |
| 11 | 61031 | Franklin Grove | 50 | D | 5 | $149K |
| 12 | 61261 | Lyndon | 44 | D | 5 | $114K |
| 13 | 61091 | Woosung | 40 | D | 0 | — |
| 14 | 61324 | Eldena | 40 | D | 0 | $142K |
| 15 | 61331 | Lee Center | 40 | D | 0 | — |
| 16 | 61378 | West Brooklyn | 29 | F | 2 | $172K |
Recommended Buyer Guides for Lee 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 — 81.4% 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 Lee County, Illinois
Overview
Lee County in Illinois covers 16 ZIP codes with an average Home Safety Score of D (53/100).
10 of 16 ZIP codes have recorded EPA violations. 11 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
Lee 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
81.4% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.