FENTON, MO · Jefferson County

FRONTIER ESTATES 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): MO6036101
System type: Community Water System
Population served: 120
Service connections: 48
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2023 – June 30, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2020 – July 31, 2020
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 29, 2015 – February 22, 2016
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
September 19, 2015 – November 17, 2016
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
September 1, 2012 – September 4, 2014
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 2012 – August 31, 2012
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
July 1, 2012 – July 31, 2012
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 2009 – January 31, 2009
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2004 – December 31, 2004
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2004 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2004 – January 31, 2004
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2003 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2002 – October 31, 2002
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2002 – September 30, 2002
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2002 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2002 – June 30, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2002 – May 31, 2002
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 2002 – February 28, 2002
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2001 – November 30, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2001 – October 31, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2001 – September 30, 2001
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2001 – June 30, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1996 – March 31, 1996
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 1994 – April 30, 1994
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 1993 – November 30, 1993
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
November 1, 1992 – October 31, 1996
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1991 – September 30, 1991
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
December 22, 1981 – September 21, 1983
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2023 – June 30, 2024	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2020 – July 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 29, 2015 – February 22, 2016	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
September 19, 2015 – November 17, 2016	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
September 1, 2012 – September 4, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
August 1, 2012 – August 31, 2012	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – July 31, 2012	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2009 – January 31, 2009	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
December 1, 2004 – December 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2004 – June 30, 2005	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2004 – January 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2003 – June 30, 2005	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2002 – October 31, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2002 – September 30, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2002 – June 30, 2005	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 2002 – June 30, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 2002 – May 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2002 – February 28, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
November 1, 2001 – November 30, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2001 – October 31, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2001 – September 30, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2001 – June 30, 2005	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 1, 1996 – March 31, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 1994 – April 30, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
November 1, 1993 – November 30, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 1992 – October 31, 1996	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
September 1, 1991 – September 30, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
December 22, 1981 – September 21, 1983	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

March 14, 2025State Compliance achieved1 linked violation
October 22, 2024State Public Notification received1 linked violation
September 3, 2024State Formal Notice of Violation issued1 linked violation
September 3, 2024State Public Notification requested1 linked violation
September 11, 2020State Public Notification received1 linked violation
August 31, 2020State Public Notification requested1 linked violation
August 31, 2020State Compliance achieved1 linked violation
August 31, 2020State Violation/Reminder Notice1 linked violation
December 14, 2018State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 17, 2016State Compliance achieved1 linked violation
November 17, 2016State Compliance achieved1 linked violation
March 1, 2016State Public Notification received1 linked violation
February 22, 2016State Compliance achieved1 linked violation
January 5, 2016State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 18, 2015State Public Notification requested1 linked violation
November 18, 2015State Formal Notice of Violation issued1 linked violation
September 4, 2014State Compliance achieved1 linked violation
January 22, 2014State Compliance achieved1 linked violation
January 22, 2014State Compliance achieved17 linked violations
January 22, 2014State Compliance achieved4 linked violations
July 2, 2013State Public Notification received1 linked violation
October 22, 2012State Public Notification received1 linked violation
October 22, 2012State Public Notification received1 linked violation
September 20, 2012State Violation/Reminder Notice1 linked violation
September 20, 2012State Public Notification requested1 linked violation
September 20, 2012State Violation/Reminder Notice1 linked violation
September 20, 2012State Public Notification requested1 linked violation
September 19, 2012State Violation/Reminder Notice1 linked violation
September 19, 2012State Public Notification requested1 linked violation
June 9, 2011State Compliance achieved9 linked violations
February 25, 2009State Public Notification requested2 linked violations
June 30, 2005State Compliance achieved5 linked violations
January 24, 2005State Violation/Reminder Notice1 linked violation
January 24, 2005State Public Notification requested1 linked violation
April 21, 2004State Violation/Reminder Notice2 linked violations
April 21, 2004State Public Notification requested2 linked violations
December 18, 2002State Public Notification requested1 linked violation
December 18, 2002State Violation/Reminder Notice1 linked violation
November 18, 2002State Violation/Reminder Notice1 linked violation
November 18, 2002State Public Notification requested1 linked violation
July 31, 2002State Public Notification requested2 linked violations
July 31, 2002State Violation/Reminder Notice2 linked violations
June 26, 2002State Bilateral Compliance Agreement signed10 linked violations
October 26, 2001State Public Notification requested3 linked violations
January 9, 2001State Compliance achieved69 linked violations
January 9, 2001State Compliance achieved1 linked violation

Contact

JACKSON, KEN

314-779-4996

FENTON, MO 63026-0000