Is THOMPSON WATER WORKS required to publish a Consumer Confidence Report?

Yes. THOMPSON WATER WORKS 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 WATER WORKS’s next Consumer Confidence Report due?

THOMPSON WATER WORKS’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.

THOMPSON, IA · Winnebago County

THOMPSON WATER WORKS Water System

Consumer Confidence Report status

THOMPSON WATER WORKS 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 WATER WORKS.

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

System facts

System ID (PWSID): IA9585017
System type: Community Water System
Population served: 499
Service connections: 312
Ownership: local government
Water source: groundwater (wells)

THOMPSON WATER WORKS is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 499 people from groundwater.

As of August 1, 2026, its federal record holds 10 entries between 1986 and 2001, all of which EPA lists as closed. Nothing has been added since 2001.

All 10 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 inorganic chemicals, volatile organic chemicals, and the Lead and Copper Rule.

Violation history

Monitoring, Regular
—
Vinyl chloride
April 1, 2001 – June 30, 2001
Resolved
Monitoring, Regular
—
Arsenic
July 1, 2000 – June 30, 2001
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
April 1, 1989 – January 16, 1990
Resolved
Monitoring, Regular
—
Fluoride
July 1, 1986 – June 30, 1989
Resolved
Monitoring, Regular
—
Arsenic
July 1, 1986 – June 30, 1989
Resolved
Monitoring, Regular
—
Nitrate
July 1, 1986 – June 30, 1989
Resolved
Monitoring, Regular
—
Selenium
July 1, 1986 – June 30, 1989
Resolved
Monitoring, Regular
—
Mercury
July 1, 1986 – June 30, 1989
Resolved
Monitoring, Regular
—
Cadmium
July 1, 1986 – June 30, 1989
Resolved
Monitoring, Regular
—
Chromium
July 1, 1986 – June 30, 1989
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
April 1, 2001 – June 30, 2001	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 2000 – June 30, 2001	Monitoring, Regular	Arsenic	—	Resolved
April 1, 1989 – January 16, 1990	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 1986 – June 30, 1989	Monitoring, Regular	Fluoride	—	Resolved
July 1, 1986 – June 30, 1989	Monitoring, Regular	Arsenic	—	Resolved
July 1, 1986 – June 30, 1989	Monitoring, Regular	Nitrate	—	Resolved
July 1, 1986 – June 30, 1989	Monitoring, Regular	Selenium	—	Resolved
July 1, 1986 – June 30, 1989	Monitoring, Regular	Mercury	—	Resolved
July 1, 1986 – June 30, 1989	Monitoring, Regular	Cadmium	—	Resolved
July 1, 1986 – June 30, 1989	Monitoring, Regular	Chromium	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

May 27, 2005State Public Notification received1 linked violation
March 1, 2005State Compliance achieved2 linked violations
September 24, 2004State Formal Notice of Violation issued2 linked violations
July 31, 2001State Compliance achieved5 linked violations
July 26, 2001State Public Notification requested4 linked violations
September 17, 1990State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
September 10, 1990State Compliance achieved1 linked violation
January 16, 1990State Compliance achieved10 linked violations
January 16, 1990State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 16, 1990State Compliance achieved3 linked violations
December 20, 1989State Administrative/Compliance Order without penalty issued8 linked violations
December 20, 1989State Administrative/Compliance Order without penalty issued1 linked violation
December 20, 1989State Administrative/Compliance Order without penalty issued1 linked violation
December 20, 1989State Administrative/Compliance Order without penalty issued2 linked violations
December 20, 1989State Administrative/Compliance Order without penalty issued8 linked violations
December 20, 1989State Administrative/Compliance Order without penalty issued1 linked violation
December 20, 1989State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
December 20, 1989State Administrative Penalty assessed9 linked violations
July 24, 1989State Compliance achievedgeneral compliance action — not tied to a specific violation on record
June 27, 1989State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 4, 1988State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 4, 1988State Public Notification requested1 linked violation
October 3, 1988State Administrative/Compliance Order without penalty issued1 linked violation
October 3, 1988State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
October 3, 1988State Administrative Penalty assessedgeneral compliance action — not tied to a specific violation on record
September 12, 1988State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 12, 1988State Compliance achieved1 linked violation
August 17, 1988State Formal Notice of Violation issued1 linked violation
May 20, 1988State Public Notification requested2 linked violations
February 22, 1988State Compliance achieved1 linked violation
October 5, 1987State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 10, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record

Common questions

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

641-584-2785

THOMPSON, IA 50478