HANNIBAL, MO · Marion County

HANNIBAL PWS Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): MO2010344
System type: Community Water System
Population served: 17,108
Service connections: 7,348
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025
Unaddressed
Maximum Contaminant Level Violation, E. coli (RTCR)
Health-based
Revised Total Coliform Rule
August 1, 2023 – August 31, 2023
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2018 – March 31, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2018 – February 28, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2018 – January 31, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2017 – December 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2017 – November 30, 2017
Resolved
Record Keeping
—
Long Term 2 Enhanced Surface Water Treatment Rule
November 1, 2016 – May 23, 2017
Resolved
Record Keeping
—
Long Term 2 Enhanced Surface Water Treatment Rule
October 1, 2016 – May 23, 2017
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Long Term 2 Enhanced Surface Water Treatment Rule
October 1, 2016 – October 31, 2016
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2016 – May 31, 2016
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Long Term 2 Enhanced Surface Water Treatment Rule
April 1, 2016 – April 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2015 – September 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2014 – December 31, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2014 – September 30, 2014
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
September 22, 2013 – June 24, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2013 – September 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2012 – December 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2012 – September 30, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2012 – March 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2011 – September 30, 2011
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 1988 – September 30, 1988
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 1988 – September 30, 1988
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1988 – March 31, 1988
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 1983 – December 31, 1983
Archived

Unaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 2, 2025	Notification, Known or Potential LSL	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
August 1, 2023 – August 31, 2023	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Health-based	Archived
March 1, 2018 – March 31, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2018 – February 28, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2018 – January 31, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2017 – December 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
November 1, 2017 – November 30, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
November 1, 2016 – May 23, 2017	Record Keeping	Long Term 2 Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2016 – May 23, 2017	Record Keeping	Long Term 2 Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2016 – October 31, 2016	Treatment Technique (SWTR and GWR)	Long Term 2 Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2016 – May 31, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2016 – April 30, 2016	Monitoring of Treatment (SWTR-Filter)	Long Term 2 Enhanced Surface Water Treatment Rule	—	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
September 22, 2013 – June 24, 2014	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2013 – September 30, 2013	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2012 – December 31, 2012	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2012 – March 31, 2012	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 1988 – September 30, 1988	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 1988 – September 30, 1988	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 1988 – March 31, 1988	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 1983 – December 31, 1983	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived

Unaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

No enforcement actions on record for this system.

Contact

LAUDERMANN, BARRY

573-221-0111

HANNIBAL, MO 63401-0000