UNION, MO · Franklin County

UNION PWS 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 Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.

System facts

System ID (PWSID): MO6010801
System type: Community Water System
Population served: 12,348
Service connections: 5,170
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2025 – February 28, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2021 – December 6, 2021
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2015 – June 30, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2014 – November 30, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2014 – October 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2013 – May 31, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2013 – April 30, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2012 – August 31, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2011 – November 30, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2011 – July 31, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2009 – August 31, 2009
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2008 – November 30, 2008
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
March 1, 2002 – March 31, 2002
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 1995 – November 30, 1995
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1994 – July 31, 1994
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 17, 1992 – September 16, 1992
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 25, 1991 – July 24, 1991
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
February 1, 2025 – February 28, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – December 6, 2021	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
June 1, 2015 – June 30, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
November 1, 2014 – November 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2014 – October 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 2013 – May 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2013 – April 30, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2012 – August 31, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
November 1, 2011 – November 30, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2011 – July 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2009 – August 31, 2009	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
November 1, 2008 – November 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
March 1, 2002 – March 31, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 1995 – November 30, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1994 – July 31, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 17, 1992 – September 16, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 25, 1991 – July 24, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

April 23, 2025State Public Notification received1 linked violation
April 2, 2025State Public Notification requested1 linked violation
April 2, 2025State Violation/Reminder Notice1 linked violation
March 18, 2025State Compliance achieved1 linked violation
December 6, 2021State Compliance achieved1 linked violation
October 6, 2015State Compliance achieved8 linked violations
October 6, 2015State Bilateral Compliance Agreement signed4 linked violations
September 18, 2015State Public Notification received1 linked violation
August 17, 2015State Public Notification requested1 linked violation
August 17, 2015State Formal Notice of Violation issued1 linked violation
August 6, 2015State Public Notification received1 linked violation
July 17, 2015State Formal Notice of Violation issued1 linked violation
July 17, 2015State Public Notification requested1 linked violation
February 5, 2015State Compliance achieved8 linked violations
December 22, 2014State Public Notification received1 linked violation
December 12, 2014State Public Notification requested1 linked violation
December 12, 2014State Formal Notice of Violation issued1 linked violation
December 4, 2014State Public Notification received1 linked violation
November 14, 2014State Formal Notice of Violation issued1 linked violation
November 14, 2014State Public Notification requested1 linked violation
January 22, 2014State Compliance achieved3 linked violations
January 22, 2014State Compliance achieved11 linked violations
January 17, 2014State Compliance achieved2 linked violations
June 26, 2013State Public Notification received1 linked violation
May 31, 2013State Public Notification requested1 linked violation
May 31, 2013State Formal Notice of Violation issued1 linked violation
May 20, 2013State Public Notification received1 linked violation
April 26, 2013State Formal Notice of Violation issued1 linked violation
April 26, 2013State Public Notification requested1 linked violation
September 14, 2012State Public Notification received1 linked violation
August 28, 2012State Public Notification requested1 linked violation
August 28, 2012State Formal Notice of Violation issued1 linked violation
June 30, 2012State Compliance achieved2 linked violations
December 12, 2011State Public Notification received1 linked violation
November 29, 2011State Violation/Reminder Notice1 linked violation
November 29, 2011State Public Notification requested1 linked violation
August 4, 2011State Public Notification received1 linked violation
July 19, 2011State Violation/Reminder Notice1 linked violation
July 19, 2011State Public Notification requested1 linked violation
September 21, 2009State Public Notification received1 linked violation
August 28, 2009State Public Notification requested1 linked violation
August 28, 2009State Violation/Reminder Notice1 linked violation
August 28, 2009State Public Notification requested1 linked violation
August 28, 2009State Violation/Reminder Notice1 linked violation
December 3, 2008State Public Notification received1 linked violation
November 24, 2008State Public Notification requested1 linked violation
November 3, 2008State Public Notification requested2 linked violations
July 12, 2007State Public Notification received1 linked violation
June 26, 2007State Public Notification requested1 linked violation
June 26, 2007State Violation/Reminder Notice1 linked violation
June 12, 2002State Public Notification received1 linked violation
July 26, 1991State Public Notification issuedgeneral compliance action — not tied to a specific violation on record

Contact

ZIMMERMANN, JONATHAN

636-583-1805

UNION, MO 63084-0000