Fairfield
EPA ID: IL1910100 · 6,202 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Fairfield (IL1910100): 1 health-based violation recorded since 2021. Looking at the EPA enforcement file for Fairfield, 17 violations are listed in the dataset, and none is recorded as open for the 6,202 people in its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Fairfield Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Fairfield have a median household income of $46,646 and about 7,924 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 72% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 60% 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?
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
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 | CARBON, TOTAL | Health-based | Archived |
| July 1, 2025 | Simazine | Non-health-based | Resolved |
| July 1, 2025 | Atrazine | Non-health-based | Resolved |
| October 1, 2023 | Total Haloacetic Acids (HAA5) | Non-health-based | Resolved |
| September 1, 2023 | Interim Enhanced Surface Water Treatment Rule | Non-health-based | Resolved |
| April 1, 2021 | ETHYLENE DIBROMIDE | Non-health-based | Resolved |
| April 1, 2021 | 1,2-DIBROMO-3-CHLOROPROPANE | Non-health-based | Resolved |
| April 1, 2021 | Dinoseb | Non-health-based | Resolved |
| April 1, 2021 | 2,4-D | Non-health-based | Resolved |
| April 1, 2021 | Pentachlorophenol | Non-health-based | Resolved |
| April 1, 2021 | 2,4,5-TP | Non-health-based | Resolved |
| April 1, 2021 | Picloram | Non-health-based | Resolved |
| April 1, 2021 | Dalapon | Non-health-based | Resolved |
| April 1, 2021 | OXAMYL | Non-health-based | Resolved |
| April 1, 2021 | Endothall | Non-health-based | Resolved |
| April 1, 2021 | Diquat | Non-health-based | Resolved |
| April 1, 2021 | Carbofuran | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Dalapon | Other Violation | 1 | No |
| Diquat | Other Violation | 1 | No |
| Endothall | Other Violation | 1 | No |
| OXAMYL | Other Violation | 1 | No |
| Simazine | Other Violation | 1 | No |
| Picloram | Other Violation | 1 | No |
| Dinoseb | Other Violation | 1 | No |
| Carbofuran | Other Violation | 1 | No |
| Atrazine | Monitoring & Reporting | 1 | No |
| 2,4-D | Other Violation | 1 | No |
| 2,4,5-TP | Other Violation | 1 | No |
| Pentachlorophenol | Other Violation | 1 | No |
| Total Haloacetic Acids (HAA5) | Monitoring & Reporting | 1 | No |
| CARBON, TOTAL | Treatment Technique | 1 | Yes |
| 1,2-DIBROMO-3-CHLOROPROPANE | 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.
Treatment options (verify a product is certified to reduce this contaminant): ferrous sulfate reduction (treatment plants), 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 |
|---|---|---|
| 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
1 of 1 ZIP records with known zones is in EPA Radon Zone 2.
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.
- 62837 - Fairfield
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records 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: 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.). Fairfield (IL): 1 Health Violation. https://zipcheckup.com/water-system/il1910100/
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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.