Is Dennison required to publish a Consumer Confidence Report?

Yes. Dennison 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 Dennison’s next Consumer Confidence Report due?

Dennison’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.

Dennison, MN · Goodhue County

Dennison Water System

Consumer Confidence Report status

Dennison 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 Dennison.

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): MN1250021
System type: Community Water System
Population served: 220
Service connections: 93
Ownership: local government
Water source: groundwater (wells)

Dennison is one of 739 community water systems in Minnesota in the 500 or fewer people size category, serving 220 people from groundwater.

As of August 1, 2026, its federal record holds 6 entries between 2022 and 2026, all of which EPA lists as closed.

Of the 6, 2 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 Total Coliform Rules.

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
February 17, 2026 – April 21, 2026
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 1, 2025 – December 31, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
July 1, 2025 – September 30, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
April 1, 2025 – June 30, 2025
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2022 – December 31, 2022
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2022 – December 31, 2022
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
February 17, 2026 – April 21, 2026	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2025 – December 31, 2025	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 1, 2025 – June 30, 2025	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
October 1, 2022 – December 31, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2022 – December 31, 2022	Monitoring and Reporting (DBP)	Chlorine	—	Archived

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

Enforcement actions

April 21, 2026State Compliance achieved1 linked violation
April 21, 2026State Public Notification received1 linked violation
April 21, 2026State Formal Notice of Violation issued1 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
January 2, 2026State Administrative/Compliance Order without penalty issued1 linked violation
January 2, 2026State Administrative/Compliance Order without penalty issued1 linked violation
January 2, 2026State Administrative/Compliance Order without penalty issued1 linked violation
December 31, 2025State Public Notification received1 linked violation
October 23, 2025State Formal Notice of Violation issued1 linked violation
October 23, 2025State Public Notification requested1 linked violation
October 23, 2025State Compliance Meeting conducted1 linked violation
September 2, 2025State Public Notification received1 linked violation
July 30, 2025State Compliance Meeting conducted1 linked violation
July 30, 2025State Formal Notice of Violation issued1 linked violation
July 30, 2025State Public Notification requested1 linked violation
April 10, 2023State Public Notification received1 linked violation
February 1, 2023State Compliance achieved1 linked violation
January 10, 2023State Formal Notice of Violation issued1 linked violation
January 10, 2023State Public Notification requested1 linked violation
January 10, 2023State Formal Notice of Violation issued1 linked violation
January 10, 2023State Public Notification requested1 linked violation
December 5, 2022State Violation/Reminder Notice1 linked violation
March 4, 2002State Public Notification received3 linked violations
August 13, 2001State Public Notification received2 linked violations
February 26, 2001State Public Notification received3 linked violations
February 20, 2001State Public Notification requested3 linked violations
February 20, 2001State Formal Notice of Violation issued3 linked violations
February 20, 2001State Intentional no-action2 linked violations
April 26, 1995State Violation/Reminder Notice2 linked violations
April 26, 1995State Compliance Meeting conducted2 linked violations

Common questions

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

Dennison City Council

5076457732

Dennison, MN 55018