Sauk
EPA ID: IL0312790 · 9,921 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Sauk (IL0312790): 104 EPA violations in the last five years. Even though Sauk accumulated 104 violations over five years, all have been formally resolved - the provider currently meets EPA standards for 9,921 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Sauk Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Sauk serves a community with a median household income of $56,627 and an estimated 52,395 residents across its service area. Approximately 78% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 46% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. 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 pumped from underground aquifers. 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
Detected Contaminants
How Sauk compares to EPA limits
What This Means For You
PFOA at 3 mg/L exceeds the EPA maximum of 0.000004 mg/L.
PFNA at 3 mg/L exceeds the EPA maximum of 0.00001 mg/L.
Chlorodibromomethane at 3 mg/L exceeds the EPA maximum of 0.002 mg/L. Liver cancer, brain cancer (known carcinogen). Consider granular activated carbon (GAC) filtration.
Bromate at 3 mg/L exceeds the EPA maximum of 0.01 mg/L.
Monochloroacetic Acid at 3 mg/L exceeds the EPA maximum of 0.06 mg/L.
Chlorodibromomethane was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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
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 | Lead and Copper Rule | Non-health-based | Resolved |
| July 12, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| July 12, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| July 12, 2025 | Lead and Copper Rule | Non-health-based | Resolved |
| July 1, 2025 | Surface Water Treatment Rule | Non-health-based | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Non-health-based | Resolved |
| April 1, 2024 | Bromoform | Non-health-based | Resolved |
| April 1, 2024 | Bromoform | Non-health-based | Resolved |
| April 1, 2024 | PFOA | Non-health-based | Resolved |
| April 1, 2024 | PFNA | Non-health-based | Resolved |
| April 1, 2024 | Monochloroacetic Acid | Non-health-based | Resolved |
| April 1, 2024 | Dichloroacetic Acid | Non-health-based | Resolved |
| April 1, 2024 | Bromodichloromethane | Non-health-based | Resolved |
| April 1, 2024 | Dibromochloromethane | Non-health-based | Resolved |
| April 1, 2024 | Chlorodibromomethane | Non-health-based | Resolved |
| April 1, 2024 | Trichloroacetic Acid | Non-health-based | Resolved |
| April 1, 2024 | Monobromoacetic Acid | Non-health-based | Resolved |
| April 1, 2024 | Dibromoacetic Acid | Non-health-based | Resolved |
| April 1, 2024 | Bromochloroacetic Acid | Non-health-based | Resolved |
| April 1, 2024 | Bromodichloroacetic Acid | 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 | Treatment Failure | 37 | No |
| PFOA | PFAS | 3 | No |
| PFNA | PFAS | 3 | No |
| Monochloroacetic Acid | Disinfection Byproducts | 3 | No |
| Dichloroacetic Acid | Disinfection Byproducts | 3 | No |
| Bromodichloromethane | Disinfection Byproducts | 3 | No |
| Dibromochloromethane | Disinfection Byproducts | 3 | No |
| Chlorodibromomethane | Disinfection Byproducts | 3 | No |
| Trichloroacetic Acid | Disinfection Byproducts | 3 | No |
| Monobromoacetic Acid | Disinfection Byproducts | 3 | No |
| Dibromoacetic Acid | Disinfection Byproducts | 3 | No |
| Bromochloroacetic Acid | Disinfection Byproducts | 3 | No |
| Bromodichloroacetic Acid | Disinfection Byproducts | 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 |
|---|---|---|
| 0 mg/L | No | N/A |
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: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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 the full compliance record 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: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
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.