Public Water Partners

PERU, IL · Carroll County

THOMSON Water System

Consumer Confidence Report status

THOMSON must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show 1 item for THOMSON that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID)
IL0150350
System type
Community Water System
Population served
580
Service connections
237
Ownership
local government
Water source
groundwater (wells)

THOMSON is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 580 people from groundwater.

As of August 1, 2026, its federal record holds 6 entries between 1977 and 2025, of which 1 remains open; none are health-based.

Of the 6, 5 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Radionuclides and Revised Rad Rule and the Lead and Copper Rule.

Violation history

  • Notification, Known or Potential LSL

    —

    LEAD AND COPPER RULE REVISIONS

    July 2, 2025

    Unaddressed

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    July 1, 2022 – September 30, 2022

    Resolved

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    October 1, 2021 – December 31, 2021

    Resolved

  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Radium (-226 and -228)

    January 1, 2015 – March 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    October 1, 2002 – December 31, 2002

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    June 30, 1977 – June 29, 1981

    Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Common questions

Is THOMSON required to publish a Consumer Confidence Report?

Yes. THOMSON is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is THOMSON’s next Consumer Confidence Report due?

THOMSON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does THOMSON have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show 1 item for THOMSON that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

GLYNN, JOSEPH A.

815-224-1650

PERU, IL 61354