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

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

OTTOSEN 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.

WHITTEMORE, IA · Humboldt County

OTTOSEN WATER SUPPLY Water System

Consumer Confidence Report status

OTTOSEN 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 OTTOSEN 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): IA4652011
System type: Community Water System
Population served: 41
Service connections: 31
Ownership: local government
Water source: groundwater (wells)

OTTOSEN WATER SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 41 people from groundwater.

As of August 1, 2026, its federal record holds 3 entries between 1984 and 2014, all of which EPA lists as closed. Nothing has been added since 2014.

Of the 3, 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 synthetic organic chemicals, the Total Coliform Rules, and the Radionuclides and Revised Rad Rule.

Violation history

Monitoring, Regular
—
Diquat
October 1, 2014 – September 30, 2020
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1998 – September 30, 1998
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1984 – September 30, 1988
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2014 – September 30, 2020	Monitoring, Regular	Diquat	—	Resolved
September 1, 1998 – September 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 1984 – September 30, 1988	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

January 21, 2022State Public Notification received1 linked violation
November 30, 2021State Compliance achieved1 linked violation
October 19, 2021State Public Notification requested1 linked violation
April 16, 2021State Public Notification received2 linked violations
December 16, 2020State Public Notification requested2 linked violations
December 9, 2020State Compliance achieved4 linked violations
November 18, 2020State Formal Notice of Violation issued1 linked violation
November 18, 2020State Public Notification requested1 linked violation
March 29, 1999State Compliance achieved2 linked violations
September 25, 1998State Public Notification received1 linked violation
May 14, 1993State Formal Notice of Violation issued10 linked violations
February 19, 1993State Formal Notice of Violation issued3 linked violations
April 18, 1989State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
April 18, 1989State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
January 30, 1989State Administrative Penalty assessed1 linked violation
January 30, 1989State Administrative/Compliance Order without penalty issued1 linked violation
January 25, 1989State Compliance achieved1 linked violation
January 25, 1989State Compliance achieved1 linked violation
September 30, 1984Federal issued Formal Notice of Violationgeneral compliance action — not tied to a specific violation on record
February 18, 1982State Unresolved1 linked violation

Common questions

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

OTTOSEN WATER SUPPLY

515-320-1122

WHITTEMORE, IA 50598