NIANGUA, MO · Webster County

NIANGUA 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): MO5010575
System type: Community Water System
Population served: 411
Service connections: 178
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Source Water (GWR)
—
E. COLI
May 1, 2025 – May 14, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2025 – March 31, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 7, 2024 – June 13, 2025
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
October 1, 2024
Unaddressed
Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
August 12, 2024 – August 23, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2024 – May 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2023 – July 31, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2022 – September 30, 2022
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2022 – November 29, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2021 – July 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2019 – September 30, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2019 – March 31, 2019
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2010 – November 30, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2010 – February 28, 2010
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2009 – June 30, 2009
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2009 – January 31, 2009
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2002 – May 31, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 1995 – April 30, 1995
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1993 – September 30, 1993
Resolved

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

Period	Violation	Contaminant / rule	Health-based	Status
May 1, 2025 – May 14, 2025	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
March 1, 2025 – March 31, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 7, 2024 – June 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2024	Lead Consumer Notice	Lead and Copper Rule	—	Unaddressed
August 12, 2024 – August 23, 2024	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
May 1, 2024 – May 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2023 – July 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
September 1, 2022 – September 30, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2022 – November 29, 2022	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2021 – July 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
September 1, 2019 – September 30, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2019 – March 31, 2019	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
November 1, 2010 – November 30, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2010 – February 28, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
June 1, 2009 – June 30, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 2009 – January 31, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
May 1, 2002 – May 31, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 1995 – April 30, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 1993 – September 30, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

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

Enforcement actions

July 3, 2025State Public Notification received22 linked violations
July 3, 2025State Public Notification received1 linked violation
June 13, 2025State Compliance achieved1 linked violation
May 29, 2025State Public Notification requested1 linked violation
April 24, 2025State Public Notification requested22 linked violations
April 24, 2025State Violation/Reminder Notice1 linked violation
August 27, 2024State Formal Notice of Violation issued3 linked violations
July 10, 2024State Compliance achieved2 linked violations
July 2, 2024State Public Notification requested3 linked violations
October 13, 2023State Public Notification received2 linked violations
August 24, 2023State Public Notification requested2 linked violations
August 14, 2023State Compliance achieved2 linked violations
October 31, 2022State Public Notification requested2 linked violations
October 19, 2022State Compliance achieved1 linked violation
October 13, 2021State Public Notification received3 linked violations
August 24, 2021State Compliance achieved2 linked violations
January 15, 2020State Compliance achieved3 linked violations
December 18, 2019State Public Notification received2 linked violations
October 29, 2019State Public Notification requested4 linked violations
June 5, 2019State Compliance achieved2 linked violations
April 22, 2019State Violation/Reminder Notice5 linked violations
August 10, 2011State Compliance achieved2 linked violations
February 3, 2011State Public Notification received3 linked violations
December 20, 2010State Violation/Reminder Notice3 linked violations
May 10, 2010State Public Notification received3 linked violations
March 22, 2010State Violation/Reminder Notice5 linked violations
August 31, 2009State Public Notification received4 linked violations
July 24, 2009State Violation/Reminder Notice3 linked violations
August 1, 2002State Public Notification received32 linked violations

Contact

PETTY, TIM

417-473-6449

NIANGUA, MO 65713-0000