Is Thompson Oaks required to publish a Consumer Confidence Report?

Yes. Thompson Oaks 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 Thompson Oaks’s next Consumer Confidence Report due?

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

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.

Ellendale, MN · Steele County

Thompson Oaks Water System

Consumer Confidence Report status

Thompson Oaks 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 no open violations for Thompson Oaks.

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 Minnesota’s official records. Always confirm current status with Minnesota before making decisions based on this information.

System facts

System ID (PWSID): MN1740008
System type: Community Water System
Population served: 51
Service connections: 17
Ownership: privately owned
Water source: groundwater (wells)

Thompson Oaks is one of 739 community water systems in Minnesota in the 500 or fewer people size category, serving 51 people from groundwater.

As of August 1, 2026, its federal record holds 13 entries between 2016 and 2026, all of which EPA lists as closed.

Of the 13, 4 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, the Public Notice Rule and Revised PN Rule, and the Lead and Copper Rule.

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
January 1, 2026 – March 31, 2026
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
July 1, 2025 – September 30, 2025
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
April 28, 2025 – May 16, 2025
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
April 1, 2025 – June 30, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
January 1, 2025 – March 31, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 1, 2024 – December 31, 2024
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2023 – June 30, 2023
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2023 – June 30, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
January 1, 2023 – March 31, 2023
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
July 1, 2020 – September 30, 2020
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2019 – March 25, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2017 – September 30, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
January 1, 2016 – March 31, 2016
Resolved

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2026 – March 31, 2026	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
July 1, 2025 – September 30, 2025	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
April 28, 2025 – May 16, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2025 – June 30, 2025	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
January 1, 2025 – March 31, 2025	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
October 1, 2024 – December 31, 2024	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
April 1, 2023 – June 30, 2023	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2023 – June 30, 2023	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
July 1, 2020 – September 30, 2020	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
January 1, 2019 – March 25, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

April 27, 2026State Public Notification requested1 linked violation
April 27, 2026State Compliance Meeting conducted1 linked violation
April 27, 2026State Formal Notice of Violation issued1 linked violation
March 14, 2026State Public Notification received1 linked violation
January 8, 2026State Formal Notice of Violation issued1 linked violation
January 8, 2026State Public Notification requested1 linked violation
January 8, 2026State Compliance Meeting conducted1 linked violation
December 15, 2025State Public Notification received1 linked violation
October 28, 2025State Formal Notice of Violation issued1 linked violation
October 28, 2025State Public Notification requested1 linked violation
October 28, 2025State Compliance Meeting conducted1 linked violation
September 10, 2025State Public Notification received1 linked violation
August 1, 2025State Compliance Meeting conducted1 linked violation
August 1, 2025State Public Notification requested1 linked violation
August 1, 2025State Formal Notice of Violation issued1 linked violation
May 27, 2025State Compliance Meeting conducted1 linked violation
May 27, 2025State Public Notification requested1 linked violation
May 27, 2025State Formal Notice of Violation issued1 linked violation
May 16, 2025State Compliance achieved1 linked violation
May 16, 2025State Public Notification received1 linked violation
May 16, 2025State Formal Notice of Violation issued1 linked violation
March 19, 2025State Compliance Meeting conducted1 linked violation
March 19, 2025State Public Notification requested1 linked violation
March 19, 2025State Formal Notice of Violation issued1 linked violation
January 10, 2024State Compliance achieved1 linked violation
January 10, 2024State Compliance achieved1 linked violation
January 10, 2024State Compliance achieved1 linked violation
January 10, 2024State Compliance achieved1 linked violation
January 10, 2024State Compliance achieved1 linked violation
September 15, 2023State Public Notification received1 linked violation
August 22, 2023State Compliance achieved2 linked violations
August 9, 2023State Public Notification requested2 linked violations
August 9, 2023State Formal Notice of Violation issued2 linked violations
August 9, 2023State Public Notification requested1 linked violation
August 9, 2023State Compliance Meeting conducted1 linked violation
August 9, 2023State Formal Notice of Violation issued1 linked violation
February 1, 2021State Formal Notice of Violation issued1 linked violation
February 1, 2021State Public Notification requested1 linked violation
February 1, 2021State Compliance Meeting conducted1 linked violation
January 29, 2021State Public Notification received2 linked violations
November 9, 2020State Violation/Reminder Notice2 linked violations
October 20, 2020State Public Notification received1 linked violation
December 16, 2019State Compliance Meeting conducted2 linked violations
March 25, 2019State Compliance achieved3 linked violations
November 6, 2018State Violation/Reminder Notice2 linked violations
December 11, 2017State Compliance achieved1 linked violation
October 30, 2017State Formal Notice of Violation issued1 linked violation
October 30, 2017State Public Notification requested1 linked violation
September 5, 2017State Violation/Reminder Notice2 linked violations
April 13, 2017State Formal Notice of Violation issued1 linked violation
April 13, 2017State Public Notification requested1 linked violation
April 12, 2017State Compliance achieved1 linked violation
March 8, 2017State Violation/Reminder Notice1 linked violation
October 24, 2016State Compliance Meeting conducted7 linked violations
October 24, 2016State Public Notification requested1 linked violation
October 24, 2016State Compliance Meeting conducted2 linked violations
October 24, 2016State Formal Notice of Violation issued1 linked violation

Common questions

Is Thompson Oaks required to publish a Consumer Confidence Report?: Yes. Thompson Oaks 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 Thompson Oaks’s next Consumer Confidence Report due?: Thompson Oaks’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does Thompson Oaks have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for Thompson Oaks.
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

Thompson Oaks

5074610804

Ellendale, MN 56026