Does Decatur, IL tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 12 violation(s) across the community water systems serving Decatur, of which 0 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Decatur, IL tap water come from?

Decatur is served by 3 active community water system(s). Their primary sources, per EPA records, are: surface water, groundwater.

IL / Decatur

IL · Tap water records

Decatur tap water, in plain English

Here is what the EPA's own data shows about tap water in Decatur. According to EPA SDWIS data retrieved June 2026, Decatur is served by 3 active community water systems, together reported to serve about 85,292 people.

As of June 2026, EPA records show 12 violations across the community water system(s) serving Decatur, going back to the earliest EPA record. None were health-based; the records are monitoring or reporting violations (a required test or report was late or missed). Each is listed by system below, with its status.

3

Community water systems
~85,292

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

Decatur

76,122 served · surface water · PWSID IL1150150

Monitoring Chlorite: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 4 times in October 2023. EPA records do not show all of these as returned to compliance.

Long Creek Township Pws

7,850 served · groundwater · PWSID IL1155150

Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in January 1995. All have since returned to compliance, per EPA records.

Harristown

1,320 served · groundwater · PWSID IL1150210

Monitoring Consumer Confidence Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2025. EPA records do not show all of these as returned to compliance.
Monitoring Lead and Copper Rule: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between December 2017 and December 2020. All have since returned to compliance, per EPA records.
Monitoring TTHM: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between January 2019 and October 2019. All have since returned to compliance, per EPA records.
Monitoring Total Haloacetic Acids (HAA5): a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 2 times between January 2019 and October 2019. All have since returned to compliance, per EPA records.

What this means

A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.

This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.

Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.