Lanark
EPA ID: IL0150100 · 1,504 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Lanark (IL0150100): 3 violations on record since 2021. Lanark's EPA record lists 3 historical violations, and none is listed as open in that record; the utility supplies water to 1,504 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Lanark Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Lanark have a median household income of $81,992 and about 4,010 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 63% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Lanark's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Illinois
System Overview
Lanark (EPA ID: IL0150100) is a community water system in Illinois that serves approximately 1,504 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 3 resolved, 0 archived, 0 addressed, and 0 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 |
|---|---|---|---|
| September 1, 2023 | Revised Total Coliform Rule | Non-health-based | Resolved |
| July 1, 2023 | Consumer Confidence Rule | Non-health-based | Resolved |
| December 30, 2021 | Lead and Copper Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
| Consumer Confidence Rule | Other (notice or report rule) | 1 | No |
| Revised Total Coliform 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 |
|---|---|---|
| Below the reporting limit | 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
2 of 2 ZIP records with known zones are in EPA Radon Zone 1.
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Lanark (IL0150100) on EPA.gov.
Frequently Asked Questions
Is Lanark water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Lanark; its 3 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Lanark serve?
Lanark serves approximately 1,504 people across 2 ZIP codes in Illinois.
Where does Lanark get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Lanark (IL): 3 EPA Violations. https://zipcheckup.com/water-system/il0150100/
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author = {{ZipCheckup}},
title = {{Lanark (IL): 3 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/il0150100/}
}
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Lanark (EPA ID: IL0150100) - request the latest Consumer Confidence Report or ask about specific contaminants.