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

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

MCCALLSBURG 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.

COLO, IA · Story County

MCCALLSBURG WATER SUPPLY Water System

Consumer Confidence Report status

MCCALLSBURG 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 MCCALLSBURG 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): IA8552010
System type: Community Water System
Population served: 353
Service connections: 147
Ownership: local government
Water source: groundwater (wells)

MCCALLSBURG WATER SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 353 people from groundwater.

As of August 1, 2026, its federal record holds 11 entries between 1981 and 2019, all of which EPA lists as closed. Nothing has been added since 2019.

Of the 11, 9 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 Total Coliform Rules.

Violation history

Monitoring and Reporting (DBP)
—
TTHM
August 1, 2019 – July 31, 2019
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1991 – September 30, 1991
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
April 1, 1990 – July 30, 1990
Resolved
Monitoring, Regular
—
Fluoride
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Cadmium
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Arsenic
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Barium
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Selenium
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Nitrate
October 1, 1984 – September 30, 1987
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
October 1, 1983 – September 30, 1984
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 1981 – September 30, 1982
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
August 1, 2019 – July 31, 2019	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 1991 – September 30, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 1990 – July 30, 1990	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Fluoride	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Cadmium	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Arsenic	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Barium	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Selenium	—	Resolved
October 1, 1984 – September 30, 1987	Monitoring, Regular	Nitrate	—	Resolved
October 1, 1983 – September 30, 1984	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
October 1, 1981 – September 30, 1982	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

July 14, 2022State Violation/Reminder Notice1 linked violation
July 14, 2022State Violation/Reminder Notice1 linked violation
July 14, 2022State Formal Notice of Violation issued1 linked violation
July 14, 2022State Intentional no-action1 linked violation
July 14, 2022State Formal Notice of Violation issued1 linked violation
July 14, 2022State Intentional no-action1 linked violation
November 6, 2019State Public Notification requested2 linked violations
November 6, 2019State Formal Notice of Violation issued1 linked violation
November 6, 2019State Public Notification requested14 linked violations
November 6, 2019State Formal Notice of Violation issued29 linked violations
July 31, 2019State Compliance achieved2 linked violations
July 31, 2019State Compliance achieved1 linked violation
July 31, 2019State Compliance achieved1 linked violation
July 31, 2019State Compliance achieved1 linked violation
July 11, 2019State Public Notification received2 linked violations
July 11, 2019State Public Notification received2 linked violations
December 21, 2018State Administrative/Compliance Order without penalty issued2 linked violations
October 17, 2018State Formal Notice of Violation issued1 linked violation
October 17, 2018State Formal Notice of Violation issued4 linked violations
October 17, 2018State Public Notification requested1 linked violation
January 16, 1992State Formal Notice of Violation issued1 linked violation
January 16, 1992State Formal Notice of Violation issued1 linked violation
January 16, 1992State Public Notification requested2 linked violations
December 12, 1991State Formal Notice of Violation issued1 linked violation
December 10, 1991State Compliance achieved5 linked violations
November 12, 1991State Public Notification requested4 linked violations
July 30, 1990State Compliance achieved2 linked violations
July 30, 1990State Compliance achieved3 linked violations
July 30, 1990State Compliance achieved1 linked violation
July 30, 1990State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 30, 1990State Compliance achieved1 linked violation
August 31, 1988State Formal Notice of Violation issued14 linked violations
September 30, 1984Federal issued Formal Notice of Violation1 linked violation

Common questions

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

MC CALLSBURG WATER SUPPLY

515-460-4750

COLO, IA 50065