Tapcensus

Fairfield

Community water system in Fairfield, Wayne County, Illinois, serving 5,998 people from surface water. 4 rules violated in the past three years. Owned by local government.

People served 5,998 surface water
Rules violated, past 3 years 4 one rule can carry several violations
Unresolved 0 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 5 of the last 12 quarters

Quarterly compliance history

VQ3
2023
VQ4
2023
–Q1
2024
–Q2
2024
–Q3
2024
–Q4
2024
–Q1
2025
–Q2
2025
VQ3
2025
VQ4
2025
–Q1
2026
VQ2
2026
UQ3
2026
–No violation identified VViolation identified SSerious violator (EPA enforcement priority) UUndetermined Oldest quarter on the left. Quarters 1 to 12 are the twelve most recent official quarters at EPA's last data refresh; the 13th is the quarter in progress at that refresh, which EPA reports as undetermined.

Rules violated in the past three years

Jul to Sep 2023 to Jul to Sep 2026

Interim and Long Term 1 Enhanced Surface Water Treatment Rule

Monitoring and Reporting

1 violation, Sep 2023 to Nov 2023 · Interim Enhanced Surface Water Treatment Rule
EPA rule code 122 · 1 violation recorded

Monitoring and Reporting: 1 violation, Sep 2023 to Nov 2023. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminant on the record: Interim Enhanced Surface Water Treatment Rule.

Stage 1 Disinfectants and Disinfection Byproducts Rule

Treatment Technique Violation Health-based

1 violation, Oct 2025 to Apr 2026 · Carbon, Total
EPA rule code 210 · 1 violation recorded, 1 health-based

Treatment Technique Violation, health-based: 1 violation, Oct 2025 to Apr 2026. The system did not carry out a required treatment process or corrective action.

Contaminant on the record: Carbon, Total.

Stage 2 Disinfectants and Disinfection Byproducts Rule

Monitoring and Reporting

1 violation, Oct 2023 to Mar 2024 · Total Haloacetic Acids (HAA5)
EPA rule code 220 · 1 violation recorded

Monitoring and Reporting: 1 violation, Oct 2023 to Mar 2024. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminant on the record: Total Haloacetic Acids (HAA5).

Synthetic Organic Chemicals

Monitoring and Reporting

5 violations, Jul 2025 to Jun 2026 · 5 contaminants
EPA rule code 320 · 5 violations recorded

Monitoring and Reporting: 5 violations, Jul 2025 to Jun 2026. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminants on the record: Simazine, Aldicarb Sulfoxide, Aldicarb Sulfone, Aldicarb, Atrazine.

Lead and copper at the tap

The 90th percentile of the tap samples the system collected in its latest monitoring period, against EPA's action level. Levels vary between homes.

Lead 0 mg/L

Action level 0.015 mg/L · Jan to Dec 2025

About this data

Rules violated and the list above come from EPA's SDWIS violation records, one row per violation and contaminant, grouped by the rule each row belongs to. A violation counts when its non-compliance period ended on or after Jul 1, 2023, the start of the thirteen quarters ECHO's three-year figures cover, or is still open; it is unresolved when it was still open at EPA's data refresh on Oct 7, 2026. EPA's rule code 500, "Not Regulated", is left out, as in ECHO's counts. Each rule's violation count is EPA's, and one rule can carry several: a missed monitoring round for a group of contaminants is one violation per contaminant and period. Category names are EPA's violation categories.

ECHO's own summary count of rules violated agrees with this grouping for 98.8% of active systems nationally, and its count of rules being violated for 98.7%; where they differ, the figures here follow the rows listed.

A measured value shown with a rule is the sample result EPA recorded with that violation (SDWIS viol_measure), against the limit EPA recorded on the same row (state_mcl), both in EPA's unit as written; violations without a recorded value, such as missed monitoring, show none. Other measured contaminant levels are not part of this record; each system publishes them in its annual Consumer Confidence Report.

Lead and copper are the newest 90th-percentile results in EPA's SDWA data download (LCR_SAMPLES, codes PB90 and CU90), retrieved on Oct 12, 2026: for each monitoring period a system reports the 90th-percentile value of its tap samples, which EPA compares with its action level of 0.015 mg/L for lead and 1.3 mg/L for copper (40 CFR 141.80). A result is not a measurement of any one tap.

Service area from EPA's Public Water System Service Area Boundaries dataset: Random Forest method, Federal agency. The system's location is the centre of the service area EPA publishes for the system.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Illinois records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.