Rockdale
EPA ID: IL1970850 · 2,012 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Rockdale (IL1970850): 6 violations recorded with unresolved status in the SDWIS data used. Rockdale's EPA file includes 6 unresolved violations; the utility supplies water to approximately 2,012 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Rockdale Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Rockdale have a median household income of $63,570 and about 19,446 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 83% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Rockdale'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.
Wastewater Proximity Note: This service area ranks in the 70th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
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
Rockdale (EPA ID: IL1970850) is a community water system in Illinois that serves approximately 2,012 people from groundwater sources.
This system serves ZIP code 60436 in Joliet.
Violation History
Status breakdown for accepted records with record years 2021-2026: 8 resolved, 0 archived, 0 addressed, and 6 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 |
|---|---|---|---|
| October 1, 2025 | Combined Radium (-226 and -228) | Non-health-based | Resolved |
| July 1, 2025 | Combined Radium (-226 and -228) | Non-health-based | Resolved |
| July 1, 2025 | Consumer Confidence Rule | Non-health-based | Unaddressed (current) |
| October 11, 2024 | Public Notice | Non-health-based | Resolved |
| July 1, 2024 | Consumer Confidence Rule | Non-health-based | Unaddressed (current) |
| July 1, 2023 | Pentachlorophenol | Non-health-based | Resolved |
| July 1, 2023 | Consumer Confidence Rule | Non-health-based | Unaddressed (current) |
| April 20, 2023 | Public Notice | Non-health-based | Unaddressed (current) |
| September 29, 2022 | Lead and Copper Rule | Non-health-based | Unaddressed (current) |
| July 1, 2022 | Consumer Confidence Rule | Non-health-based | Resolved |
| January 13, 2022 | Public Notice | Non-health-based | Unaddressed (current) |
| January 1, 2022 | Combined Radium (-226 and -228) | Non-health-based | Resolved |
| October 1, 2021 | Combined Radium (-226 and -228) | Non-health-based | Resolved |
| July 1, 2021 | Consumer Confidence 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 |
|---|---|---|---|
| Consumer Confidence Rule | Other (notice or report rule) | 5 | No |
| Combined Radium (-226 and -228) | Monitoring & Reporting | 4 | No |
| Public Notice | Other (notice or report rule) | 3 | No |
| Pentachlorophenol | Other Violation | 1 | No |
| Public Notice | 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 |
|---|---|---|
| 0.0013 mg/L | No | 2026-06-30 |
The accepted LCR snapshot contains 1 reported copper action-level exceedance record for this PWSID. The source does not provide a verified copper level for publication.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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.
- 60436 - Joliet
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Rockdale (IL1970850) on EPA.gov.
Frequently Asked Questions
Is Rockdale water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 6 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Rockdale serve?
Rockdale serves approximately 2,012 people across 1 ZIP code in Illinois.
Where does Rockdale get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Rockdale (IL): 14 EPA Violations. https://zipcheckup.com/water-system/il1970850/
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author = {{ZipCheckup}},
title = {{Rockdale (IL): 14 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/il1970850/}
}
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
Rockdale (EPA ID: IL1970850) - request the latest Consumer Confidence Report or ask about specific contaminants.