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

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

MALLARD 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.

MALLARD, IA · Palo Alto County

MALLARD WATER SUPPLY Water System

Consumer Confidence Report status

MALLARD 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 1 item for MALLARD WATER SUPPLY 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 Iowa’s official records. Always confirm current status with Iowa before making decisions based on this information.

System facts

System ID (PWSID): IA7450019
System type: Community Water System
Population served: 257
Service connections: 163
Ownership: local government
Water source: groundwater (wells)

MALLARD WATER SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 257 people from groundwater.

As of August 1, 2026, its federal record holds 17 entries between 1985 and 2025, of which 1 remains open; none are health-based.

Of the 17, 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 inorganic chemicals, the Stage 2 Disinfectants and Disinfection Byproducts Rule, and the Lead and Copper Rule.

Violation history

Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2025
Unaddressed
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2024 – March 31, 2024
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2022 – June 30, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2021 – December 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2021 – June 30, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2021 – March 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2020 – June 30, 2020
Archived
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2020 – March 31, 2020
Archived
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2019 – December 31, 2019
Archived
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2019 – September 30, 2019
Archived
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2016 – July 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2016 – July 31, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2012 – March 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2011 – December 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2011 – September 30, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Nitrate
July 1, 1985 – June 30, 1988
Resolved

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)

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Unaddressed
January 1, 2024 – March 31, 2024	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2022 – June 30, 2022	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2021 – June 30, 2021	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2021 – March 31, 2021	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2020 – June 30, 2020	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Archived
January 1, 2020 – March 31, 2020	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Archived
October 1, 2019 – December 31, 2019	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Archived
July 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Archived
July 1, 2016 – July 31, 2016	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2016 – July 31, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2012 – March 31, 2012	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2011 – December 31, 2011	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2011 – June 30, 2011	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 1985 – June 30, 1988	Monitoring, Regular	Nitrate	—	Resolved

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

June 25, 2025State Public Notification received1 linked violation
January 29, 2025State Compliance achieved2 linked violations
January 29, 2025State Compliance achieved2 linked violations
January 29, 2025State Compliance achieved2 linked violations
November 20, 2024State Public Notification received2 linked violations
October 15, 2024State Public Notification requested2 linked violations
August 14, 2024State Public Notification received2 linked violations
July 15, 2024State Formal Notice of Violation issued2 linked violations
May 17, 2024State Formal Notice of Violation issued1 linked violation
April 24, 2024State Formal Notice of Violation issued2 linked violations
January 30, 2024State Public Notification requested2 linked violations
October 11, 2023State Administrative/Compliance Order without penalty issued2 linked violations
October 11, 2023State Administrative/Compliance Order without penalty issued3 linked violations
October 11, 2023State Administrative/Compliance Order without penalty issued2 linked violations
October 11, 2023State Administrative/Compliance Order without penalty issued2 linked violations
October 11, 2023State Administrative/Compliance Order without penalty issued2 linked violations
May 15, 2023State Compliance achieved2 linked violations
May 15, 2023State Compliance achieved3 linked violations
May 15, 2023State Compliance achieved2 linked violations
December 20, 2022State Administrative/Compliance Order without penalty issued4 linked violations
December 20, 2022State Administrative/Compliance Order without penalty issued2 linked violations
December 20, 2022State Administrative/Compliance Order without penalty issued4 linked violations
December 20, 2022State Administrative/Compliance Order without penalty issued3 linked violations
October 18, 2022State Public Notification requested2 linked violations
May 2, 2022State Public Notification requested2 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued2 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued4 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued3 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued3 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued2 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued3 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued2 linked violations
March 28, 2022State Administrative/Compliance Order without penalty issued2 linked violations
January 10, 2022State Public Notification received1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued3 linked violations
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
December 13, 2021State Administrative/Compliance Order without penalty issued2 linked violations
December 13, 2021State Administrative/Compliance Order without penalty issued3 linked violations
December 13, 2021State Administrative/Compliance Order without penalty issued2 linked violations
December 13, 2021State Administrative/Compliance Order without penalty issued1 linked violation
October 6, 2021State Public Notification received1 linked violation
October 5, 2021State Public Notification requested1 linked violation
October 5, 2021State Formal Notice of Violation issued1 linked violation
July 21, 2021State Public Notification received1 linked violation
June 28, 2021State Formal Notice of Violation issued1 linked violation
June 28, 2021State Public Notification requested1 linked violation
May 10, 2021State Public Notification received1 linked violation
April 9, 2021State Formal Notice of Violation issued1 linked violation
April 9, 2021State Public Notification requested1 linked violation
January 5, 2021State Public Notification received1 linked violation
January 5, 2021State Public Notification received1 linked violation
December 16, 2020State Public Notification requested1 linked violation
December 16, 2020State Formal Notice of Violation issued1 linked violation
September 28, 2020State Formal Notice of Violation issued1 linked violation
September 28, 2020State Public Notification requested1 linked violation
July 9, 2020State Public Notification received1 linked violation
June 8, 2020State Public Notification requested1 linked violation
June 8, 2020State Formal Notice of Violation issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued2 linked violations
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 2, 2020State Administrative/Compliance Order without penalty issued2 linked violations
June 2, 2020State Administrative/Compliance Order without penalty issued2 linked violations
June 2, 2020State Administrative/Compliance Order without penalty issued2 linked violations
June 2, 2020State Administrative/Compliance Order without penalty issued2 linked violations
March 4, 2020State Public Notification received1 linked violation
February 10, 2020State Public Notification requested1 linked violation
February 10, 2020State Formal Notice of Violation issued1 linked violation
January 14, 2020State Public Notification received1 linked violation
January 14, 2020State Public Notification received2 linked violations
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued2 linked violations
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued2 linked violations
December 19, 2019State Administrative/Compliance Order without penalty issued1 linked violation
December 19, 2019State Administrative/Compliance Order without penalty issued2 linked violations
December 13, 2019State Public Notification requested1 linked violation
December 13, 2019State Formal Notice of Violation issued1 linked violation
December 12, 2019State Compliance achieved2 linked violations
November 21, 2019State Formal Notice of Violation issued2 linked violations
November 21, 2019State Formal Notice of Violation issued2 linked violations
May 7, 2019State Public Notification received2 linked violations
April 8, 2019State Public Notification requested2 linked violations
August 13, 2018State Formal Notice of Violation issued8 linked violations
October 3, 2016State Formal Notice of Violation issued3 linked violations
October 3, 2016State Formal Notice of Violation issued1 linked violation
October 3, 2016State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 3, 2016State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
August 3, 2016State Compliance achieved7 linked violations
May 23, 2012State Compliance achieved2 linked violations
May 23, 2012State Compliance achieved1 linked violation
May 3, 2012State Public Notification received3 linked violations
February 14, 2012State Public Notification requested3 linked violations
February 14, 2012State Formal Notice of Violation issued3 linked violations
August 31, 1988State Formal Notice of Violation issued1 linked violation
August 31, 1988State Public Notification requested1 linked violation
August 18, 1988State Compliance achieved1 linked violation
February 10, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
January 26, 1982State Unresolved1 linked violation

Common questions

Is MALLARD WATER SUPPLY required to publish a Consumer Confidence Report?: Yes. MALLARD 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 MALLARD WATER SUPPLY’s next Consumer Confidence Report due?: MALLARD WATER SUPPLY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MALLARD WATER SUPPLY have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 item for MALLARD WATER SUPPLY 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

MALLARD WATER SUPPLY

712-425-3529

MALLARD, IA 50562