KEYSTONE, IA · Benton County

KEYSTONE WATER SUPPLY Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)

Violation history

Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
May 1, 2021 – May 31, 2021
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrite
November 1, 2020 – November 30, 2020
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 1, 2018 – February 28, 2019
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2018 – June 30, 2019
Resolved
Monitoring, Regular
—
Nitrite
November 1, 2015 – November 30, 2015
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Monitoring, Regular
—
Nitrite
August 1, 2013 – August 31, 2013
Resolved
Monitoring, Regular
—
Nitrite
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, 2013 – March 31, 2014
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
Monitoring, Regular
—
Mercury
April 1, 1988 – March 31, 1991
Resolved
Monitoring, Regular
—
Fluoride
April 1, 1988 – March 31, 1991
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
May 1, 2021 – May 31, 2021	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
November 1, 2020 – November 30, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrite	Health-based	Resolved
December 1, 2018 – February 28, 2019	Lead Consumer Notice	Lead and Copper Rule	—	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, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 2013 – August 31, 2013	Monitoring, Regular	Nitrite	—	Resolved
August 1, 2013 – August 31, 2013	Monitoring, Regular	Nitrite	—	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, 2013 – March 31, 2014	Monitoring, Regular	Nitrate	—	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
April 1, 1988 – March 31, 1991	Monitoring, Regular	Mercury	—	Resolved
April 1, 1988 – March 31, 1991	Monitoring, Regular	Fluoride	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

October 12, 2021State Compliance achieved5 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 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 Formal Notice of Violation issued1 linked violation
July 17, 2019State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
July 17, 2019State Public Notification requested1 linked violation
July 17, 2019State Public Notification requestedgeneral 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
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 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
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 Public Notification received1 linked violation
July 21, 2014State Public Notification received1 linked violation
July 21, 2014State Compliance achieved1 linked violation
April 16, 2014State Public Notification requested1 linked violation
April 16, 2014State Compliance achieved1 linked violation
April 16, 2014State Formal Notice of Violation issued1 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
October 17, 2013State Formal Notice of Violation issued2 linked violations
September 23, 2013State Compliance achieved2 linked violations
September 23, 2013State Compliance achieved2 linked violations
September 18, 2013State Public Notification requested1 linked violation
September 18, 2013State Formal Notice of Violation issued2 linked violations
August 20, 2013State Intentional no-action1 linked violation
August 20, 2013State Formal Notice of Violation issued1 linked violation
August 20, 2013State Violation/Reminder Notice1 linked violation
August 19, 2013State Formal Notice of Violation issued2 linked violations
August 19, 2013State Public Notification requested2 linked violations
April 16, 2013State Compliance achieved2 linked violations
April 16, 2013State Formal Notice of Violation issued2 linked violations
April 16, 2013State Public Notification requested1 linked violation
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 Public Notification requested2 linked violations
December 19, 2011State Formal Notice of Violation issued2 linked violations
December 15, 2005State Compliance achieved3 linked violations
June 9, 2005State Public Notification requested2 linked violations
June 9, 2004State Public Notification received6 linked violations
June 9, 2004State Formal Notice of Violation issued6 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 Formal Notice of Violation issued4 linked violations
April 2, 1991State Compliance achieved10 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 achieved2 linked violations
April 2, 1991State Compliance achieved2 linked violations
April 2, 1991State Compliance achieved1 linked violation
May 23, 1990State Public Notification requested1 linked violation
May 23, 1990State Formal Notice of Violation issued2 linked violations
April 18, 1990State Compliance achievedgeneral compliance action — not tied to a specific violation on record

Contact

KEYSTONE WATER SUPPLY

319-202-4956

KEYSTONE, IA 52249