Is CASTALIA WATER WORKS required to publish a Consumer Confidence Report?

Yes. CASTALIA WATER WORKS 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 CASTALIA WATER WORKS’s next Consumer Confidence Report due?

CASTALIA WATER WORKS’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.

OSSIAN, IA · Winneshiek County

CASTALIA WATER WORKS Water System

Consumer Confidence Report status

CASTALIA WATER WORKS 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 CASTALIA WATER WORKS.

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): IA9620082
System type: Community Water System
Population served: 145
Service connections: 86
Ownership: local government
Water source: groundwater (wells)

CASTALIA WATER WORKS is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 145 people from groundwater.

As of August 1, 2026, its federal record holds 2 entries between 1987 and 1992, all of which EPA lists as closed. Nothing has been added since 1992.

Of the 2, 1 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 Total Coliform Rules and the Radionuclides and Revised Rad Rule.

Violation history

Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1987 – June 30, 1991
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
March 1, 1992 – March 31, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1987 – June 30, 1991	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

January 1, 1995State Compliance achieved1 linked violation
September 29, 1994State Public Notification received5 linked violations
September 29, 1994State Public Notification received2 linked violations
September 16, 1994State Formal Notice of Violation issued3 linked violations
September 16, 1994State Public Notification requested3 linked violations
September 13, 1994State Formal Notice of Violation issued4 linked violations
September 13, 1994State Formal Notice of Violation issued4 linked violations
September 13, 1994State Public Notification requested3 linked violations
September 12, 1994State Compliance achieved9 linked violations
September 12, 1994State Compliance achieved4 linked violations
September 12, 1994State Compliance achieved16 linked violations
February 23, 1993State Public Notification received3 linked violations
February 9, 1993State Public Notification requested2 linked violations
April 15, 1992State Formal Notice of Violation issued3 linked violations
April 15, 1992State Public Notification requested2 linked violations
October 28, 1991State Public Notification requested3 linked violations
August 30, 1988State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
August 30, 1988State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 1, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record

Common questions

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

CASTALIA WATER WORKS

563-419-4631

OSSIAN, IA 52161