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

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

KEYSTONE 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.

KEYSTONE, IA · Benton County

KEYSTONE WATER SUPPLY Water System

Consumer Confidence Report status

KEYSTONE 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 KEYSTONE 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): IA0640030
System type: Community Water System
Population served: 599
Service connections: 280
Ownership: local government
Water source: groundwater (wells)

KEYSTONE WATER SUPPLY is one of 403 community water systems in Iowa in the 501 to 3,300 people size category, serving 599 people from groundwater.

As of August 1, 2026, its federal record holds 14 entries between 1988 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.

Of the 14, 9 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 Public Notice Rule and Revised PN Rule.

Violation history

Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrite
November 1, 2020 – November 30, 2020
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2018 – June 30, 2019
Resolved
Monitoring, Regular
—
Nitrite
November 1, 2015 – November 30, 2015
Resolved
Monitoring, Regular
—
Nitrite
August 1, 2013 – August 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 20, 2013 – July 21, 2014
Resolved
Monitoring, Regular
—
Toluene
April 1, 2013 – June 30, 2013
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2012 – March 31, 2013
Resolved
Monitoring, Regular
—
Nitrite
November 1, 2011 – November 30, 2011
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2011 – November 30, 2011
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrite
September 1, 2011 – September 30, 2011
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrite
June 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrite
June 1, 2004 – June 30, 2004
Resolved
Monitoring, Regular
—
Mercury
April 1, 1988 – March 31, 1991
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
November 1, 2020 – November 30, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrite	Health-based	Resolved
July 1, 2018 – June 30, 2019	Monitoring, Regular	Nitrate	—	Resolved
November 1, 2015 – November 30, 2015	Monitoring, Regular	Nitrite	—	Resolved
August 1, 2013 – August 31, 2013	Monitoring, Regular	Nitrite	—	Resolved
August 1, 2013 – August 31, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 20, 2013 – July 21, 2014	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2013 – June 30, 2013	Monitoring, Regular	Toluene	—	Resolved
April 1, 2012 – March 31, 2013	Monitoring, Regular	Nitrate	—	Resolved
November 1, 2011 – November 30, 2011	Monitoring, Regular	Nitrite	—	Resolved
November 1, 2011 – November 30, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Single Sample	Nitrite	Health-based	Resolved
June 1, 2005 – June 30, 2005	Maximum Contaminant Level Violation, Single Sample	Nitrite	Health-based	Resolved
June 1, 2004 – June 30, 2004	Maximum Contaminant Level Violation, Average	Nitrite	Health-based	Resolved
April 1, 1988 – March 31, 1991	Monitoring, Regular	Mercury	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

October 12, 2021State Compliance achieved5 linked violations
September 7, 2021State Compliance achieved2 linked violations
July 6, 2021State Formal Notice of Violation issued3 linked violations
April 14, 2021State Formal Notice of Violation issued3 linked violations
November 19, 2020State Formal Notice of Violation issued2 linked violations
November 19, 2020State Public Notification requested5 linked violations
October 23, 2019State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
October 9, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 9, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 9, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 9, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 9, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 8, 2019State Compliance achieved1 linked violation
July 17, 2019State Public Notification requested1 linked violation
July 17, 2019State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 17, 2019State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
July 17, 2019State Formal Notice of Violation issued1 linked violation
April 29, 2019State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 29, 2019State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
February 28, 2019State Compliance achieved1 linked violation
January 29, 2019State Compliance achieved1 linked violation
January 28, 2019State Formal Notice of Violation issued1 linked violation
November 19, 2018State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
November 19, 2018State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
November 19, 2018State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
November 19, 2018State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
October 25, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 25, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 4, 2018State Public Notification received1 linked violation
September 27, 2018State Public Notification requested1 linked violation
September 27, 2018State Formal Notice of Violation issued1 linked violation
March 7, 2016State Public Notification received1 linked violation
December 21, 2015State Compliance achieved1 linked violation
December 16, 2015State Public Notification requested1 linked violation
December 16, 2015State Formal Notice of Violation issued1 linked violation
June 1, 2015State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
May 8, 2015State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 14, 2015State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
April 14, 2015State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
July 22, 2014State Compliance achieved1 linked violation
July 21, 2014State Public Notification received1 linked violation
July 21, 2014State Compliance achieved1 linked violation
July 21, 2014State Public Notification received1 linked violation
July 21, 2014State Public Notification received1 linked violation
April 16, 2014State Public Notification requested1 linked violation
April 16, 2014State Formal Notice of Violation issued1 linked violation
April 16, 2014State Compliance achieved1 linked violation
January 21, 2014State Public Notification received1 linked violation
December 4, 2013State Public Notification received1 linked violation
December 4, 2013State Public Notification received1 linked violation
October 23, 2013State Compliance achieved2 linked violations
October 23, 2013State Compliance achieved2 linked violations
October 17, 2013State Public Notification requested2 linked violations
September 23, 2013State Compliance achieved2 linked violations
September 18, 2013State Formal Notice of Violation issued2 linked violations
September 18, 2013State Public Notification requested1 linked violation
September 18, 2013State Formal Notice of Violation issued2 linked violations
August 20, 2013State Formal Notice of Violation issued1 linked violation
August 20, 2013State Intentional no-action1 linked violation
August 20, 2013State Violation/Reminder Notice1 linked violation
August 19, 2013State Formal Notice of Violation issued2 linked violations
June 6, 2013State Public Notification received2 linked violations
April 16, 2013State Formal Notice of Violation issued2 linked violations
April 16, 2013State Public Notification requested1 linked violation
March 19, 2013State Compliance achieved2 linked violations
February 18, 2013State Formal Notice of Violation issued2 linked violations
February 18, 2013State Public Notification requested2 linked violations
January 3, 2012State Public Notification received2 linked violations
January 3, 2012State Public Notification received1 linked violation
January 3, 2012State Public Notification received2 linked violations
December 20, 2011State Compliance achieved1 linked violation
December 20, 2011State Compliance achieved2 linked violations
December 20, 2011State Compliance achieved4 linked violations
December 19, 2011State Formal Notice of Violation issued1 linked violation
December 19, 2011State Formal Notice of Violation issued3 linked violations
December 19, 2011State Public Notification requested2 linked violations
June 9, 2005State Public Notification requested2 linked violations
June 9, 2004State Public Notification received6 linked violations
March 5, 1998State Public Notification received1 linked violation
February 24, 1998State Compliance achieved1 linked violation
February 23, 1998State Compliance achieved2 linked violations
February 17, 1998State Public Notification requested3 linked violations
April 2, 1991State Compliance achieved2 linked violations
April 2, 1991State Compliance achieved1 linked violation
April 2, 1991State Compliance achieved2 linked violations
April 2, 1991State Compliance achieved2 linked violations
April 2, 1991State Compliance achieved1 linked violation
April 2, 1991State Compliance achieved10 linked violations
May 23, 1990State Formal Notice of Violation issued2 linked violations
May 23, 1990State Formal Notice of Violation issued1 linked violation
May 23, 1990State Public Notification requested1 linked violation
April 18, 1990State Compliance achievedgeneral compliance action — not tied to a specific violation on record

Common questions

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

KEYSTONE WATER SUPPLY

319-202-4956

KEYSTONE, IA 52249