Tapcensus

Herrin

Community water system in Herrin, Williamson County, Illinois, serving 12,747 people from surface water purchased. 6 rules violated in the past three years. Owned by local government.

People served 12,747 surface water purchased
Rules violated, past 3 years 6 one rule can carry several violations
Unresolved 0 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 4 of the last 12 quarters

Quarterly compliance history

–Q3
2023
–Q4
2023
–Q1
2024
–Q2
2024
VQ3
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

Revised Total Coliform Rule

Monitoring Violation

1 violation, Jun 2026 to Jun 2026
EPA rule code 111 · 1 violation recorded

Monitoring Violation: 1 violation, Jun 2026 to Jun 2026. The system did not complete required monitoring. This does not show that a contaminant was found.

What the rule requires: The 2013 RTCR (effective 2016) replaced the original TCR. It triggers automatic E. coli testing whenever total coliform is found. A single E. coli-positive sample is an acute MCL violation. It also requires systems exceeding 5% total coliform-positive samples to conduct a formal assessment and correct any deficiencies, helping prevent contamination before it escalates.

About this rule

Stage 1 Disinfectants and Disinfection Byproducts Rule

Monitoring and Reporting

1 violation, Jun 2026 to Jun 2026 · Chloramine
EPA rule code 210 · 1 violation recorded

Monitoring and Reporting: 1 violation, Jun 2026 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.

Contaminant on the record: Chloramine.

Stage 2 Disinfectants and Disinfection Byproducts Rule

Monitoring and Reporting

1 violation, Jul 2024 to Nov 2024 · TTHM (Total Trihalomethanes)
EPA rule code 220 · 1 violation recorded

Monitoring and Reporting: 1 violation, Jul 2024 to Nov 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: TTHM (Total Trihalomethanes).

Lead and Copper Rule

Monitoring and Reporting

1 violation, Jul 2025 to Dec 2025
EPA rule code 350 · 1 violation recorded

Monitoring and Reporting: 1 violation, Jul 2025 to Dec 2025. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

What the rule requires: The 1991 LCR uses action levels rather than MCLs: if the 90th percentile of high-risk tap samples exceeds 15 ppb lead or 1.3 mg/L copper, the system must take escalating corrective actions. Violations typically indicate failure to maintain adequate corrosion control — the treatment that keeps lead from leaching out of pipes, solder, and fixtures.

About this rule

Lead and Copper Rule Revisions

Reporting Violation

1 violation, Jul 2025 to Jul 2025
EPA rule code 351 · 1 violation recorded

Reporting Violation: 1 violation, Jul 2025 to Jul 2025. The system did not report required information on time.

What the rule requires: The 2021 LCRR updated the 1991 LCR with mandatory lead service line inventories and replacement planning, a new 'trigger level' at 10 ppb requiring optimization, and strengthened public education. The 2024 Lead and Copper Rule Improvements (LCRI) further requires replacing all lead service lines within 10 years.

About this rule

Consumer Confidence Rule

Other Violation

1 violation, Jul 2025 to Sep 2025
EPA rule code 420 · 1 violation recorded

Other Violation: 1 violation, Jul 2025 to Sep 2025. A requirement other than monitoring, reporting, or a contaminant limit, such as public notice or the annual water quality report.

What the rule requires: Community water systems must deliver an annual water quality report (Consumer Confidence Report) to all customers by July 1, covering the previous year. It must list all detected contaminants, compare them to MCLs, identify source water, and include educational language about lead. A violation means the report was not delivered on time or was incomplete.

About this rule

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 0.0098 mg/L

Action level 0.015 mg/L · Jan to Jun 2026

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.