Fairfield
EPA ID: IL1910100 · 6,202 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Fairfield (IL1910100): 1 past health-based violation, since resolved. Beyond the 17 historical violations on Fairfield's EPA record, nothing remains open - the utility is currently compliant and supplies water to 6,202 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Fairfield Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Fairfield serves a community with a median household income of $46,646 and an estimated 7,924 residents across its service area. Approximately 72% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 60% 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?
Fairfield'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.
Infrastructure Risk
Detected Contaminants
How Fairfield compares to EPA limits
What This Means For You
Benzene at 1 mg/L exceeds the EPA maximum of 0.005 mg/L.
Contaminant 2110 at 1 mg/L exceeds the EPA maximum of 0.005 mg/L. Leukemia & blood cancers (known carcinogen). Consider granular activated carbon (GAC) filtration.
Total Trihalomethanes (TTHM) at 1 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Contaminant 2031 at 1 mg/L exceeds the EPA maximum of mg/L.
Contaminant 2032 at 1 mg/L exceeds the EPA maximum of mg/L.
Contaminant 2110 was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →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
Fairfield (EPA ID: IL1910100) is a community water system in Illinois that serves approximately 6,202 people from surface water sources.
This system serves ZIP code 62837 in Fairfield.
Violation History
Status breakdown for accepted records with record years 2021-2026: 16 resolved, 1 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 |
|---|---|---|---|
| October 1, 2025 | Chlorite | Health-based | Archived |
| July 1, 2025 | Contaminant 2037 | Non-health-based | Resolved |
| July 1, 2025 | Benzene | Non-health-based | Resolved |
| October 1, 2023 | Total Trihalomethanes (TTHM) | Non-health-based | Resolved |
| September 1, 2023 | Fecal Coliform | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2946 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2931 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2041 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2105 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2326 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2110 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2040 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2031 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2036 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2033 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2032 | Non-health-based | Resolved |
| April 1, 2021 | Contaminant 2046 | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Contaminant 2031 | Other Violation | 1 | No |
| Contaminant 2032 | Other Violation | 1 | No |
| Contaminant 2033 | Other Violation | 1 | No |
| Contaminant 2036 | Other Violation | 1 | No |
| Contaminant 2037 | Other Violation | 1 | No |
| Contaminant 2040 | Other Violation | 1 | No |
| Contaminant 2041 | Other Violation | 1 | No |
| Contaminant 2046 | Other Violation | 1 | No |
| Benzene | Organic | 1 | No |
| Contaminant 2105 | Other Violation | 1 | No |
| Contaminant 2110 | Other Violation | 1 | No |
| Contaminant 2326 | Other Violation | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 1 | No |
| Chlorite | Disinfection Byproducts | 1 | Yes |
| Contaminant 2931 | Other Violation | 1 | No |
Health Risk Details
Chlorite (EPA limit: 1 mg/L)
Anemia and nervous system effects in infants and children At-risk groups: infants, developing fetuses, people with G6PD deficiency.
Removal methods: ferrous sulfate reduction, activated carbon, reverse osmosis. Find the right filter →
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.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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.
- 62837 - Fairfield
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Fairfield (IL1910100) on EPA.gov.
Frequently Asked Questions
Is Fairfield water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Fairfield; its 17 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Fairfield serve?
Fairfield serves approximately 6,202 people across 1 ZIP code in Illinois.
Where does Fairfield get its water?
The primary water source is surface water.
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 →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Fairfield (IL): 1 Health Violation. https://zipcheckup.com/water-system/il1910100/
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author = {{ZipCheckup}},
title = {{Fairfield (IL): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/il1910100/}
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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
Fairfield (EPA ID: IL1910100) - request the latest Consumer Confidence Report or ask about specific contaminants.