Walnut Hill, IL: 1 Violation — 83/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
Walnut Hill, IL: reliable drinking water, above-average safety record, few violations.
How Walnut Hill Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Walnut Hill Water
- Your city's water systems recorded 1 violation in the past 5 years.
- Average lead level: 0.0034 mg/L.
- Homes built before 1986: 40% — older plumbing may contain lead solder.
- Estimated remediation: $900 per household.
- CDC health risk index: 14.47 — above typical levels.
Who Supplies Your Water in Walnut Hill
3 independent water providers serve Walnut Hill, IL — 3 systems appear in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Walnut Hill, Illinois (population ~922), covering 3 community water systems serving approximately 20,442 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Walnut Hill: B (83/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Walnut Hill water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0034 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 62893 | B | 1 | 0 | Centralia |
All ZIP Codes in Walnut Hill
- 62893 [B] — 1 violation
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Walnut Hill
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Top Contaminants in Walnut Hill Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Walnut Hill
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Pre-1986 construction carries elevated plumbing-era lead risk because lead solder was widely used before that federal ban. In Walnut Hill, the median build year of 1998 indicates a housing stock where that older fraction represents a significant share of the residential inventory.
Most homes in Walnut Hill were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Walnut Hill Homeowners
In Walnut Hill, property wealth outpaces what documented remediation typically demands — the equity burden lands well within the low tier.
Remediation costs in Walnut Hill are relatively low compared to home values. The $300–$1,600 estimated range is a small fraction of median property value. Home values are 25% below the Illinois average.
Lead Exposure Risk for Children in Walnut Hill
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Older stock in Walnut Hill represents 40% of the inventory, and citywide monitoring runs at or above the federal action level — making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Walnut Hill, IL