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

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

OYENS 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.

REMSEN, IA · Plymouth County

OYENS WATER SUPPLY Water System

Consumer Confidence Report status

OYENS 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 OYENS 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): IA7561021
System type: Community Water System
Population served: 92
Service connections: 64
Ownership: local government
Water source: groundwater (wells)

OYENS WATER SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 92 people from groundwater.

As of August 1, 2026, its federal record holds 12 entries between 1986 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 12, 8 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 Total Coliform Rules, and the Consumer Confidence Rule.

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – August 31, 2023
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2010 – September 30, 2010
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
August 1, 2007 – August 31, 2007
Resolved
Monitoring, Regular
—
Nitrite
July 1, 1997 – September 30, 1998
Resolved
Monitoring, Regular
—
Nitrite
September 1, 1995 – September 30, 1995
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1988 – July 24, 1989
Resolved
Monitoring, Regular
—
Barium
April 1, 1986 – March 31, 1989
Resolved
Monitoring, Regular
—
Fluoride
April 1, 1986 – March 31, 1989
Resolved
Monitoring, Regular
—
Mercury
April 1, 1986 – March 31, 1989
Resolved
Monitoring, Regular
—
Selenium
April 1, 1986 – March 31, 1989
Resolved
Monitoring, Regular
—
Arsenic
April 1, 1986 – March 31, 1989
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2023 – August 31, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2010 – September 30, 2010	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2007 – August 31, 2007	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1997 – September 30, 1998	Monitoring, Regular	Nitrite	—	Resolved
September 1, 1995 – September 30, 1995	Monitoring, Regular	Nitrite	—	Resolved
October 1, 1988 – July 24, 1989	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
April 1, 1986 – March 31, 1989	Monitoring, Regular	Barium	—	Resolved
April 1, 1986 – March 31, 1989	Monitoring, Regular	Fluoride	—	Resolved
April 1, 1986 – March 31, 1989	Monitoring, Regular	Mercury	—	Resolved
April 1, 1986 – March 31, 1989	Monitoring, Regular	Selenium	—	Resolved
April 1, 1986 – March 31, 1989	Monitoring, Regular	Arsenic	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

August 31, 2023State Compliance achieved1 linked violation
August 31, 2023State Public Notification received1 linked violation
August 15, 2023State Formal Notice of Violation issued1 linked violation
November 12, 2012State Compliance achieved1 linked violation
November 12, 2012State Compliance achieved1 linked violation
October 15, 2012State Public Notification received1 linked violation
October 15, 2012State Public Notification received1 linked violation
October 8, 2012State Formal Notice of Violation issued3 linked violations
October 5, 2012State Violation/Reminder Notice1 linked violation
October 15, 2004State Public Notification received2 linked violations
September 22, 2004State Public Notification requested3 linked violations
September 7, 2004State Compliance achieved2 linked violations
January 25, 2003State Compliance achieved2 linked violations
January 24, 2003State Public Notification requested3 linked violations
August 27, 2001State Public Notification requested22 linked violations
August 30, 1999State Public Notification received3 linked violations
July 2, 1999State Public Notification requested2 linked violations
December 8, 1995State Public Notification received2 linked violations
July 24, 1989State Compliance achieved2 linked violations
July 24, 1989State Compliance achieved2 linked violations

Common questions

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

OYENS WATER SUPPLY

712-540-4171

REMSEN, IA 51050