Is LEON WATER SUPPLY required to publish a Consumer Confidence Report?

Yes. LEON WATER SUPPLY 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 LEON WATER SUPPLY’s next Consumer Confidence Report due?

LEON WATER SUPPLY’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.

LEON, IA · Decatur County

LEON WATER SUPPLY Water System

Consumer Confidence Report status

LEON WATER SUPPLY 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 LEON WATER SUPPLY.

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): IA2742076
System type: Community Water System
Population served: 1,830
Service connections: 825
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

LEON WATER SUPPLY is one of 403 community water systems in Iowa in the 501 to 3,300 people size category, serving 1,830 people from surface water.

As of August 1, 2026, its federal record holds 11 entries between 1978 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 11, 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 Stage 2 Disinfectants and Disinfection Byproducts Rule, the Radionuclides and Revised Rad Rule, and the Surface Water Treatment Rules.

Violation history

Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2023 – July 31, 2023
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2022 – August 31, 2022
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
February 1, 2022 – February 28, 2022
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2018 – September 4, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2016 – December 31, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2016 – September 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 1984 – September 30, 1985
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
October 1, 1984 – September 30, 1985
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Gross Alpha, Excl. Radon and U
October 1, 1983 – September 30, 1984
Archived
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
November 9, 1979 – November 8, 1980
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 23, 1978 – October 22, 1979
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
July 1, 2023 – July 31, 2023	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2022 – August 31, 2022	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2022 – February 28, 2022	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2018 – September 4, 2018	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
October 1, 2016 – December 31, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2016 – September 30, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 1984 – September 30, 1985	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived
October 1, 1984 – September 30, 1985	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
October 1, 1983 – September 30, 1984	Maximum Contaminant Level Violation, Single Sample	Gross Alpha, Excl. Radon and U	Health-based	Archived
November 9, 1979 – November 8, 1980	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived
October 23, 1978 – October 22, 1979	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived

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

Enforcement actions

November 17, 2025State Public Notification requested6 linked violations
August 22, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
March 6, 2025State Public Notification received9 linked violations
March 6, 2025State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 6, 2025State Public Notification received2 linked violations
March 6, 2025State Public Notification received1 linked violation
March 6, 2025State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 6, 2025State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 6, 2025State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
February 18, 2025State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
February 18, 2025State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
February 13, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 13, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification received4 linked violations
December 17, 2024State Public Notification received1 linked violation
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 17, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
November 14, 2024State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
November 14, 2024State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
September 12, 2023State Public Notification received1 linked violation
September 1, 2023State Compliance achieved2 linked violations
August 17, 2023State Formal Notice of Violation issued1 linked violation
May 3, 2023State Public Notification received1 linked violation
May 3, 2023State Public Notification received2 linked violations
November 10, 2022State Compliance achieved1 linked violation
November 8, 2022State Public Notification received1 linked violation
October 11, 2022State Formal Notice of Violation issued1 linked violation
October 10, 2022State Compliance achieved1 linked violation
August 31, 2022State Public Notification received1 linked violation
August 24, 2022State Formal Notice of Violation issued1 linked violation
May 3, 2022State Compliance achieved1 linked violation
May 3, 2022State Compliance achieved2 linked violations
April 20, 2022State Formal Notice of Violation issued1 linked violation
April 20, 2022State Public Notification requested1 linked violation
April 20, 2022State Formal Notice of Violation issued2 linked violations
April 20, 2022State Public Notification requested2 linked violations
April 20, 2022State Formal Notice of Violation issued2 linked violations
April 20, 2022State Public Notification requested1 linked violation
November 15, 2018State Public Notification received1 linked violation
September 4, 2018State Compliance achieved1 linked violation
September 1, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 21, 2018State Public Notification requested2 linked violations
July 26, 2018State Formal Notice of Violation issued1 linked violation
May 8, 2017State Compliance achieved1 linked violation
May 8, 2017State Compliance achieved5 linked violations
May 8, 2017State Compliance achieved3 linked violations
January 4, 2017State Public Notification received5 linked violations
October 17, 2016State Public Notification received1 linked violation
September 16, 2016State Public Notification requested2 linked violations
September 16, 2016State Formal Notice of Violation issued3 linked violations
August 9, 2016State Public Notification requested2 linked violations
November 22, 1995State Formal Notice of Violation issued3 linked violations
October 23, 1995State Compliance achieved2 linked violations
June 12, 1991State Public Notification received2 linked violations
May 6, 1991State Compliance achieved1 linked violation
May 6, 1991State Compliance achieved1 linked violation
June 21, 1989State Intentional no-action1 linked violation
January 25, 1985State Bilateral Compliance Agreement signed2 linked violations
December 15, 1983State Formal Notice of Violation issued1 linked violation
February 16, 1982State Unresolved1 linked violation

Common questions

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

LEON WATER SUPPLY

641-446-6221

LEON, IA 50144