Sauk
EPA ID: IL0312790 · 9,921 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Sauk (IL0312790): 104 violations on record since 2021. Sauk's EPA record lists 104 historical violations, and none is listed as open in that record; the utility supplies water to 9,921 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Sauk Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Sauk have a median household income of $56,627 and about 52,395 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 78% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 46% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Sauk'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
Sauk (EPA ID: IL0312790) is a community water system in Illinois that serves approximately 9,921 people from groundwater sources.
This system serves ZIP code 60411 in Chicago Heights.
Violation History
Status breakdown for accepted records with record years 2021-2026: 104 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 |
|---|---|---|---|
| July 12, 2025 | Public Notice | Non-health-based | Resolved |
| July 12, 2025 | Public Notice | Non-health-based | Resolved |
| July 12, 2025 | Public Notice | Non-health-based | Resolved |
| July 12, 2025 | Public Notice | Non-health-based | Resolved |
| July 1, 2025 | Consumer Confidence Rule | Non-health-based | Resolved |
| July 1, 2024 | Consumer Confidence Rule | Non-health-based | Resolved |
| April 1, 2024 | Vinyl chloride | Non-health-based | Resolved |
| April 1, 2024 | Vinyl chloride | Non-health-based | Resolved |
| April 1, 2024 | 1,2,4-Trichlorobenzene | Non-health-based | Resolved |
| April 1, 2024 | cis-1,2-Dichloroethylene | Non-health-based | Resolved |
| April 1, 2024 | Xylenes, Total | Non-health-based | Resolved |
| April 1, 2024 | DICHLOROMETHANE | Non-health-based | Resolved |
| April 1, 2024 | o-Dichlorobenzene | Non-health-based | Resolved |
| April 1, 2024 | p-Dichlorobenzene | Non-health-based | Resolved |
| April 1, 2024 | 1,1-Dichloroethylene | Non-health-based | Resolved |
| April 1, 2024 | trans-1,2-Dichloroethylene | Non-health-based | Resolved |
| April 1, 2024 | 1,2-Dichloroethane | Non-health-based | Resolved |
| April 1, 2024 | 1,1,1-Trichloroethane | Non-health-based | Resolved |
| April 1, 2024 | Carbon tetrachloride | Non-health-based | Resolved |
| April 1, 2024 | 1,2-Dichloropropane | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Public Notice | Other (notice or report rule) | 37 | No |
| 1,2,4-Trichlorobenzene | Monitoring & Reporting | 3 | No |
| cis-1,2-Dichloroethylene | Monitoring & Reporting | 3 | No |
| Xylenes, Total | Monitoring & Reporting | 3 | No |
| DICHLOROMETHANE | Monitoring & Reporting | 3 | No |
| o-Dichlorobenzene | Monitoring & Reporting | 3 | No |
| p-Dichlorobenzene | Monitoring & Reporting | 3 | No |
| 1,1-Dichloroethylene | Monitoring & Reporting | 3 | No |
| trans-1,2-Dichloroethylene | Monitoring & Reporting | 3 | No |
| 1,2-Dichloroethane | Monitoring & Reporting | 3 | No |
| 1,1,1-Trichloroethane | Monitoring & Reporting | 3 | No |
| Carbon tetrachloride | Monitoring & Reporting | 3 | No |
| 1,2-Dichloropropane | Monitoring & Reporting | 3 | No |
| Chlorodibromoacetic Acid | Disinfection Byproducts | 3 | No |
| Tribromoacetic Acid | Disinfection Byproducts | 3 | 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 | 2023-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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.
- 60411 - Chicago Heights
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Sauk (IL0312790) on EPA.gov.
Frequently Asked Questions
Is Sauk water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Sauk; its 104 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Sauk serve?
Sauk serves approximately 9,921 people across 1 ZIP code in Illinois.
Where does Sauk get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: No PFAS Reported Above Reporting Levels
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were reported above UCMR5 minimum reporting levels.
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.). Sauk (IL): 104 EPA Violations. https://zipcheckup.com/water-system/il0312790/
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title = {{Sauk (IL): 104 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/il0312790/}
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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
Sauk (EPA ID: IL0312790) - request the latest Consumer Confidence Report or ask about specific contaminants.