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

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

WINTHROP 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.

WINTHROP, IA · Buchanan County

WINTHROP WATER SUPPLY Water System

Consumer Confidence Report status

WINTHROP 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 WINTHROP 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): IA1093031
System type: Community Water System
Population served: 840
Service connections: 380
Ownership: local government
Water source: groundwater (wells)

WINTHROP WATER SUPPLY is one of 403 community water systems in Iowa in the 501 to 3,300 people size category, serving 840 people from groundwater.

As of August 1, 2026, its federal record holds 5 entries in 1988, all of which EPA lists as closed. Nothing has been added since 1988.

All 5 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.

Violation history

Monitoring, Regular
—
Arsenic
April 1, 1988 – March 31, 1991
Resolved
Monitoring, Regular
—
Cadmium
April 1, 1988 – March 31, 1991
Resolved
Monitoring, Regular
—
Chromium
April 1, 1988 – March 31, 1991
Resolved
Monitoring, Regular
—
Fluoride
April 1, 1988 – March 31, 1991
Resolved
Monitoring, Regular
—
Nitrate
April 1, 1988 – March 31, 1991
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
April 1, 1988 – March 31, 1991	Monitoring, Regular	Arsenic	—	Resolved
April 1, 1988 – March 31, 1991	Monitoring, Regular	Cadmium	—	Resolved
April 1, 1988 – March 31, 1991	Monitoring, Regular	Chromium	—	Resolved
April 1, 1988 – March 31, 1991	Monitoring, Regular	Fluoride	—	Resolved
April 1, 1988 – March 31, 1991	Monitoring, Regular	Nitrate	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

December 27, 1991State Public Notification received2 linked violations
December 27, 1991State Public Notification received2 linked violations
December 27, 1991State Public Notification received3 linked violations
December 27, 1991State Public Notification received1 linked violation
November 12, 1991State Compliance achieved1 linked violation
November 12, 1991State Compliance achieved1 linked violation
November 4, 1991State Administrative/Compliance Order without penalty issued5 linked violations
November 4, 1991State Administrative/Compliance Order without penalty issued2 linked violations
November 4, 1991State Administrative/Compliance Order without penalty issued2 linked violations
November 4, 1991State Administrative/Compliance Order without penalty issued16 linked violations
October 29, 1991State Formal Notice of Violation issued1 linked violation
October 29, 1991State Public Notification requested6 linked violations
October 29, 1991State Public Notification requested1 linked violation
October 29, 1991State Formal Notice of Violation issued13 linked violations
October 29, 1991State Public Notification requested2 linked violations
October 29, 1991State Public Notification requested7 linked violations
October 29, 1991State Formal Notice of Violation issued12 linked violations

Common questions

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

WINTHROP WATER SUPPLY

563-920-4416

WINTHROP, IA 50682