Wilmington
EPA ID: IL1971100 · 5,700 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Wilmington (IL1971100): 1 violation recorded with unresolved status in the SDWIS data used. In EPA records, Wilmington has 1 violation listed as unresolved, with the utility supplying water to approximately 5,700 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Wilmington Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: B
Demographics of ZIP Codes Served
The ZIP codes associated with Wilmington have a median household income of $76,398 and about 11,277 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 59% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Wilmington's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Wastewater Proximity Note: This service area ranks in the 70th percentile nationally for proximity to wastewater discharge points. Surface water sources near wastewater outfalls may face additional treatment challenges.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 4 detections recorded.
Comparable Water Systems
Similar-sized systems in Illinois
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Wilmington (EPA ID: IL1971100) is a community water system in Illinois that serves approximately 5,700 people from surface water sources.
This system serves ZIP code 60481 in Wilmington.
ZIP-Area Home Safety Context: B (77/100)
This is the average Home Safety Score for 1 of 1 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 11 resolved, 0 archived, 0 addressed, and 1 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 2, 2025 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Unaddressed (current) |
| February 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| February 1, 2025 | Chloramine | Non-health-based | Resolved |
| February 1, 2024 | Interim Enhanced Surface Water Treatment Rule | Non-health-based | Resolved |
| January 1, 2024 | Interim Enhanced Surface Water Treatment Rule | Non-health-based | Resolved |
| January 1, 2024 | Surface Water Treatment Rule | Non-health-based | Resolved |
| July 10, 2023 | Consumer Confidence Rule | Non-health-based | Resolved |
| April 1, 2023 | TTHM | Non-health-based | Resolved |
| April 1, 2023 | Total Haloacetic Acids (HAA5) | Non-health-based | Resolved |
| January 1, 2023 | Toxaphene | Non-health-based | Resolved |
| December 30, 2022 | Lead and Copper Rule | Non-health-based | Resolved |
| January 1, 2022 | CARBON, TOTAL | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | Monitoring & Reporting | 2 | No |
| Chloramine | Other Violation | 1 | No |
| Toxaphene | Other Violation | 1 | No |
| Total Haloacetic Acids (HAA5) | Monitoring & Reporting | 1 | No |
| CARBON, TOTAL | Monitoring & Reporting | 1 | No |
| TTHM | Monitoring & Reporting | 1 | No |
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
| LEAD AND COPPER RULE REVISIONS | Monitoring & Reporting | 1 | No |
| Consumer Confidence Rule | Other (notice or report rule) | 1 | No |
| Revised Total Coliform Rule | Monitoring & Reporting | 1 | No |
| Consumer Confidence Rule | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0023 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
1 of 1 ZIP records with known zones is in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by IL or modeled from parcel and building-footprint data.
- 60481 - Wilmington
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Wilmington (IL1971100) on EPA.gov.
Frequently Asked Questions
Is Wilmington water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current noncompliance record and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Wilmington serve?
Wilmington serves approximately 5,700 people across 1 ZIP code in Illinois.
Where does Wilmington get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected; the table compares each one with the EPA MCL where one exists (April 2024 rule, compliance required from 2029) and with this state's enforceable standard where one exists.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Wilmington (IL): 12 EPA Violations. https://zipcheckup.com/water-system/il1971100/
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title = {{Wilmington (IL): 12 EPA Violations}},
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url = {https://zipcheckup.com/water-system/il1971100/}
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What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Wilmington (EPA ID: IL1971100) - request the latest Consumer Confidence Report or ask about specific contaminants.