Is CHARTER OAK WATER SUPPLY required to publish a Consumer Confidence Report?

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

CHARTER OAK 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.

CHARTER OAK, IA · Crawford County

CHARTER OAK WATER SUPPLY Water System

Consumer Confidence Report status

CHARTER OAK 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 CHARTER OAK 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): IA2417018
System type: Community Water System
Population served: 522
Service connections: 306
Ownership: local government
Water source: groundwater (wells)

CHARTER OAK WATER SUPPLY is one of 403 community water systems in Iowa in the 501 to 3,300 people size category, serving 522 people from groundwater.

As of August 1, 2026, its federal record holds 5 entries between 1989 and 2019, all of which EPA lists as closed. Nothing has been added since 2019.

Of the 5, 4 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, the Stage 2 Disinfectants and Disinfection Byproducts Rule, and volatile organic chemicals.

Violation history

Monitoring and Reporting (DBP)
—
TTHM
July 1, 2019 – July 31, 2019
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2003 – May 31, 2003
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2001 – May 31, 2001
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 1990 – July 31, 1990
Resolved
Monitoring, Regular
—
Nitrate
October 1, 1989 – December 31, 1989
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2019 – July 31, 2019	Monitoring and Reporting (DBP)	TTHM	—	Resolved
May 1, 2003 – May 31, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 2001 – May 31, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1990 – July 31, 1990	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 1989 – December 31, 1989	Monitoring, Regular	Nitrate	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

July 22, 2020State Compliance achieved1 linked violation
July 22, 2020State Compliance achieved1 linked violation
June 10, 2020State Public Notification received1 linked violation
June 10, 2020State Public Notification received1 linked violation
September 17, 2019State Formal Notice of Violation issued1 linked violation
September 17, 2019State Public Notification requested1 linked violation
September 17, 2019State Public Notification requested1 linked violation
September 17, 2019State Formal Notice of Violation issued1 linked violation
February 20, 2015State Public Notification received1 linked violation
December 16, 2014State Formal Notice of Violation issued2 linked violations
June 28, 2002State Public Notification received1 linked violation
May 11, 2001State Violation/Reminder Notice2 linked violations
June 3, 1996State Compliance achieved8 linked violations
January 29, 1996State Formal Notice of Violation issued2 linked violations
January 29, 1996State Public Notification requested2 linked violations
October 15, 1994State Formal Notice of Violation issued9 linked violations
September 8, 1994State Public Notification received2 linked violations
May 20, 1994State Public Notification requested3 linked violations
February 14, 1994State Public Notification requested2 linked violations
February 22, 1993State Compliance achieved4 linked violations
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved1 linked violation
February 22, 1993State Compliance achieved3 linked violations
February 9, 1993State Formal Notice of Violation issued2 linked violations
February 9, 1993State Public Notification requested1 linked violation
February 9, 1993State Public Notification requested3 linked violations
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Public Notification requested3 linked violations
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Public Notification requested3 linked violations
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Formal Notice of Violation issued5 linked violations
February 9, 1993State Formal Notice of Violation issued4 linked violations
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Formal Notice of Violation issued2 linked violations
February 9, 1993State Public Notification requested1 linked violation
February 9, 1993State Public Notification requested2 linked violations
February 9, 1993State Formal Notice of Violation issued5 linked violations
February 9, 1993State Public Notification requested6 linked violations
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Public Notification requested1 linked violation
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Public Notification requested1 linked violation
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Public Notification requested1 linked violation
February 9, 1993State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 9, 1993State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
February 9, 1993State Formal Notice of Violation issued1 linked violation
February 9, 1993State Public Notification requested1 linked violation
February 9, 1993State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
February 9, 1993State Public Notification requested1 linked violation
February 9, 1993State Public Notification requested1 linked violation

Common questions

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

CHARTER OAK WATER SUPPLY

712-269-1106

CHARTER OAK, IA 51439