HORNERSVILLE, MO · Dunklin County

HORNERSVILLE 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): MO4010379
System type: Community Water System
Population served: 526
Service connections: 261
Ownership: local government
Water source: groundwater (wells)

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
June 28, 2023 – September 1, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2022 – May 31, 2022
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2021 – March 31, 2021
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2021 – March 31, 2021
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2021 – March 31, 2021
Resolved
Monitoring, Regular
—
Barium
January 1, 2021 – March 31, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2019 – September 3, 2020
Resolved
Maximum Contaminant Level Violation, E. coli (RTCR)
Health-based
Revised Total Coliform Rule
September 1, 2018 – September 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2016 – June 30, 2016
Resolved
Monitoring, Regular
—
LASSO
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Endrin
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Simazine
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Picloram
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2014 – December 31, 2019
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2014 – December 31, 2019
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2013 – September 25, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – November 7, 2014
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2011 – November 29, 2017
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Benzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Toluene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Styrene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Chromium
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Selenium
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Barium
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – December 31, 2010
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
June 28, 2023 – September 1, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
May 1, 2022 – May 31, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring, Regular	Barium	—	Resolved
July 1, 2019 – September 3, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
April 1, 2016 – June 30, 2016	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	LASSO	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Endrin	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Simazine	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Picloram	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2014 – December 31, 2019	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
October 1, 2013 – September 25, 2014	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2013 – November 7, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2011 – November 29, 2017	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Benzene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Toluene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Styrene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Chromium	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Selenium	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Barium	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

October 9, 2025State Public Notification requested1 linked violation
October 9, 2025State Violation/Reminder Notice1 linked violation
May 12, 2025State Public Notification received1 linked violation
May 1, 2025State Public Notification received1 linked violation
January 8, 2025State Public Notification requested1 linked violation
January 8, 2025State Violation/Reminder Notice1 linked violation
December 18, 2024State Compliance achieved1 linked violation
November 22, 2024State Compliance achieved1 linked violation
October 1, 2023State Public Notification received1 linked violation
September 1, 2023State Compliance achieved1 linked violation
June 27, 2022State Public Notification requested1 linked violation
June 27, 2022State Violation/Reminder Notice1 linked violation
June 24, 2022State Compliance achieved1 linked violation
June 16, 2022State Public Notification received10 linked violations
February 8, 2022State Compliance achieved20 linked violations
July 28, 2021State Compliance achieved21 linked violations
April 20, 2021State Compliance achieved10 linked violations
April 7, 2021State Violation/Reminder Notice10 linked violations
April 7, 2021State Public Notification requested10 linked violations
September 30, 2020State Compliance achieved54 linked violations
September 30, 2020State Compliance achieved10 linked violations
September 3, 2020State Compliance achieved1 linked violation
September 3, 2020State Compliance achieved1 linked violation
May 15, 2020State Public Notification received23 linked violations
March 18, 2020State Public Notification requested23 linked violations
March 18, 2020State Violation/Reminder Notice23 linked violations
November 4, 2019State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2018State Compliance achieved1 linked violation
October 16, 2018State Public Notification received1 linked violation
October 5, 2018State Other1 linked violation
September 27, 2018State Boil Water Order1 linked violation
September 27, 2018State Formal Notice of Violation issued1 linked violation
September 27, 2018State Public Notification requested1 linked violation
November 29, 2017State Compliance achieved1 linked violation
October 26, 2016State Compliance achieved1 linked violation
July 14, 2016State Public Notification received1 linked violation
June 23, 2016State Formal Notice of Violation issued1 linked violation
June 23, 2016State Public Notification requested1 linked violation
November 13, 2014State Compliance achieved31 linked violations
November 7, 2014State Compliance achieved1 linked violation
September 25, 2014State Compliance achieved1 linked violation
January 22, 2014State Compliance achieved4 linked violations
December 10, 2013State Public Notification received1 linked violation
November 19, 2013State Public Notification requested1 linked violation
November 19, 2013State Formal Notice of Violation issued1 linked violation
July 11, 2011State Public Notification received31 linked violations
June 30, 2011State Public Notification requested10 linked violations
June 30, 2011State Public Notification requested21 linked violations
June 30, 2011State Violation/Reminder Notice21 linked violations
June 30, 2011State Violation/Reminder Notice10 linked violations
September 14, 2007State Violation/Reminder Notice1 linked violation
November 29, 2004State Public Notification received1 linked violation

Contact

LEE, TERRY

573-737-2616

HORNERSVILLE, MO 63855-0000