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

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

OAKVILLE 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.

OAKVILLE, IA · Louisa County

OAKVILLE WATER SUPPLY Water System

Consumer Confidence Report status

OAKVILLE 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 OAKVILLE 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): IA5868085
System type: Community Water System
Population served: 200
Service connections: 93
Ownership: local government
Water source: groundwater (wells)

OAKVILLE WATER SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 200 people from groundwater.

As of August 1, 2026, its federal record holds 13 entries between 1988 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 13, 11 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 Consumer Confidence Rule, and the Total Coliform Rules.

Violation history

Monitoring, Regular
—
Nitrate
July 1, 2023 – June 30, 2024
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2017 – June 30, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – September 28, 2012
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2011 – November 2, 2011
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2010 – January 31, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2006 – March 31, 2006
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1990 – March 26, 1991
Resolved
Monitoring, Regular
—
Cadmium
January 1, 1988 – December 31, 1990
Resolved
Monitoring, Regular
—
Chromium
January 1, 1988 – December 31, 1990
Resolved
Monitoring, Regular
—
Arsenic
January 1, 1988 – December 31, 1990
Resolved
Monitoring, Regular
—
Mercury
January 1, 1988 – December 31, 1990
Resolved
Monitoring, Regular
—
Selenium
January 1, 1988 – December 31, 1990
Resolved
Monitoring, Regular
—
Barium
January 1, 1988 – December 31, 1990
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2023 – June 30, 2024	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2017 – June 30, 2018	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2012 – September 28, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2011 – November 2, 2011	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2010 – January 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 2006 – March 31, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 1990 – March 26, 1991	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 1988 – December 31, 1990	Monitoring, Regular	Cadmium	—	Resolved
January 1, 1988 – December 31, 1990	Monitoring, Regular	Chromium	—	Resolved
January 1, 1988 – December 31, 1990	Monitoring, Regular	Arsenic	—	Resolved
January 1, 1988 – December 31, 1990	Monitoring, Regular	Mercury	—	Resolved
January 1, 1988 – December 31, 1990	Monitoring, Regular	Selenium	—	Resolved
January 1, 1988 – December 31, 1990	Monitoring, Regular	Barium	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

March 5, 2026State Formal Notice of Violation issued1 linked violation
March 5, 2026State Public Notification requested1 linked violation
October 22, 2025State Public Notification requested1 linked violation
October 22, 2025State Public Notification requested1 linked violation
October 22, 2025State Formal Notice of Violation issued1 linked violation
October 22, 2025State Formal Notice of Violation issued1 linked violation
August 14, 2024State Public Notification received1 linked violation
July 30, 2024State Compliance achieved1 linked violation
July 17, 2024State Formal Notice of Violation issued1 linked violation
July 17, 2024State Public Notification requested1 linked violation
September 1, 2018State Public Notification received1 linked violation
July 24, 2018State Formal Notice of Violation issued1 linked violation
July 24, 2018State Public Notification requested1 linked violation
July 10, 2018State Compliance achieved1 linked violation
September 28, 2012State Compliance achieved1 linked violation
January 1, 2011State Public Notification received1 linked violation
April 26, 1996State Formal Notice of Violation issued4 linked violations
April 26, 1996State Public Notification requested4 linked violations
June 3, 1991State Public Notification requested2 linked violations
June 3, 1991State Public Notification requested1 linked violation
June 3, 1991State Public Notification requested3 linked violations
June 3, 1991State Formal Notice of Violation issued1 linked violation
June 3, 1991State Formal Notice of Violation issued1 linked violation
June 3, 1991State Public Notification requested1 linked violation
June 3, 1991State Formal Notice of Violation issued2 linked violations
June 3, 1991State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 26, 1991State Compliance achieved2 linked violations
March 26, 1991State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 26, 1991State Compliance achieved4 linked violations
March 26, 1991State Compliance achieved1 linked violation
March 26, 1991State Compliance achieved1 linked violation
March 26, 1991State Compliance achieved1 linked violation
June 28, 1989State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
June 28, 1989State Public Notification received1 linked violation
December 20, 1988State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 5, 1988State Compliance achieved1 linked violation
September 28, 1988State Formal Notice of Violation issued1 linked violation
September 30, 1984Federal issued Formal Notice of Violationgeneral compliance action — not tied to a specific violation on record

Common questions

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

OAKVILLE WATER SUPPLY

319-759-8120

OAKVILLE, IA 52646