OHA Drinking Water Services
OR41
PWS ID: 00239 ---- LONDON WATER CO-OP
Violation History

Violations are displayed for the last 5 years only.
Group Abbreviations:  CCR = Consumer Confidence Report, DBP = Disinfection Byproducts, NO3 = Nitrate, RL = Rule, SWTR = Surface Water Treatment Rule, TCR = Total Coliform Rule, VOC = Volatile Organic Chemicals
Purple shading indicates formal enforcement.  Gray shading indicates return to compliance. 

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Violation
Number		Monitoring Period
Begin
End 		Facility
ID		 Analyte
Group		 Violation Type - Analyte Count
Show analytes for all violations 		Enforcement Action - Date
Hide history 		Points Contact
Report
903410306Aug 01, 2025 Aug 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Public Notice Required - Sep 30, 2025
 10
903410299Jul 01, 2025 CCR CCR Late/Nonreporting - 1 1
903410305May 01, 2025 May 31, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410297) - 1  Show analyte 1
903410303Apr 01, 2025 Apr 30, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410294) - 1  Show analyte Partially addressed - Show analyte
Returned To Compliance - Aug 06, 2025
 1
903410298May 01, 2025 May 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410297May 01, 2025 May 31, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410295Apr 01, 2025 Apr 30, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410294Apr 01, 2025 Apr 30, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410292Mar 01, 2025 Mar 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410291Mar 01, 2025 Mar 31, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410288Feb 01, 2025 Feb 28, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410287Feb 01, 2025 Feb 28, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410286Jan 01, 2025 Jan 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410285Jan 01, 2025 Jan 31, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410284Dec 01, 2024 Dec 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410283Dec 01, 2024 Dec 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410282Nov 01, 2024 Nov 30, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410281Nov 01, 2024 Nov 30, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410275May 01, 2024 May 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410274May 01, 2024 May 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410273Apr 01, 2024 Apr 30, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410272Mar 01, 2024 Mar 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410271Mar 01, 2024 Mar 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410270Feb 01, 2024 Feb 29, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410269Jan 01, 2024 Jan 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410268Jan 01, 2024 Jan 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410261Nov 01, 2023 Nov 30, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410260Nov 01, 2023 Nov 30, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410259Oct 01, 2023 Oct 31, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410258Oct 01, 2023 Oct 31, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
 10
903410253May 01, 2023 May 31, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410252May 01, 2023 May 31, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410251Apr 01, 2023 Apr 30, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410250Apr 01, 2023 Apr 30, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410249Feb 01, 2023 Feb 28, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410248Feb 01, 2023 Feb 28, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410236Nov 01, 2022 Nov 30, 2022WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410235Nov 01, 2022 Nov 30, 2022WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
 10
903410096Dec 01, 2018 RL Public Notice Late/Nonreporting (Viol # 903410092) - 1
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
Bilateral Compliance Agreement Signed - Sep 23, 2019
 1 9/17/2019
903410092Dec 01, 2018 No Qualified Treatment Plant Operator - 1
Bilateral Compliance Agreement Signed - Jul 24, 2024
Bilateral Compliance Agreement Signed - Apr 03, 2023
Bilateral Compliance Agreement Signed - Sep 23, 2019
 5 9/17/2019
903410308Jun 01, 2025 Jun 30, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410300) - 1  Show analyte
Returned To Compliance - Sep 14, 2025
Returned To Compliance - Sep 17, 2025
 1
903410301Jun 01, 2025 Jun 30, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte
Returned To Compliance - Aug 06, 2025
 10
903410300Jun 01, 2025 Jun 30, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte
Returned To Compliance - Aug 06, 2025
 10
903410293Feb 01, 2025 Feb 28, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410288) - 1  Show analyte
Returned To Compliance - Apr 16, 2025
 1
903410290Dec 01, 2024 Dec 31, 2024 SWTR Public Notice Late/Nonreporting (Viol # 903410283) - 1  Show analyte
Returned To Compliance - Feb 20, 2025
 1
903410289Nov 01, 2024 Nov 30, 2024 SWTR Public Notice Late/Nonreporting (Viol # 903410281) - 1  Show analyte
Returned To Compliance - Feb 20, 2025
 1
903410280Oct 01, 2024 Oct 16, 2024 CCR CCR Certification Late/Nonreporting - 1
Returned To Compliance - Oct 16, 2024
 1
903410276Jul 01, 2024 Oct 16, 2024 CCR CCR Late/Nonreporting - 1
Returned To Compliance - Oct 16, 2024
 1
903410279Aug 01, 2024 Aug 31, 2024WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Oct 02, 2024
 1
903410267Jan 01, 2024 Jan 31, 2024WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Mar 04, 2024
Bilateral Compliance Agreement Signed - Jul 24, 2024
 1
903410264Dec 01, 2023 Dec 31, 2023WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Mar 04, 2024
Bilateral Compliance Agreement Signed - Jul 24, 2024
 1
903410257Oct 01, 2023 Oct 12, 2023 CCR CCR Certification Late/Nonreporting - 1
Returned To Compliance - Oct 12, 2023
 1
903410256Jun 01, 2023 Jun 30, 2023WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Aug 10, 2023
 1
903410244Feb 01, 2023 Feb 28, 2023 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Mar 06, 2023
 1
903410247Jan 01, 2023 Jan 31, 2023WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Mar 10, 2023
 1
903410241Dec 01, 2022 Dec 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Feb 13, 2023
 1
903410242Nov 01, 2022 Nov 30, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Feb 13, 2023
 1
903410234Oct 01, 2022 Oct 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Feb 13, 2023
 1
903410231Oct 01, 2022 Oct 31, 2022 TCR Acute MCL for E. coli - 1
Returned To Compliance - Nov 16, 2022
 10
903410230Sep 01, 2022 Sep 30, 2022 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Oct 31, 2022
 1
903410229Aug 01, 2022 Aug 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Oct 10, 2022
 1
903410226Jul 01, 2022 Jul 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Oct 10, 2022
 1
903410223Jun 01, 2022 Jun 30, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Oct 10, 2022
 1
903410220May 01, 2022 May 31, 2022 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Jun 03, 2022
 1
903410219Mar 01, 2022 Mar 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - May 10, 2022
 1
903410216Dec 01, 2021 Dec 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Feb 09, 2022
 1
903410213Jan 01, 2021 Dec 31, 2021EP-A VOC Chemical Late/Nonreporting - 21  Show analytes
Returned To Compliance - Oct 10, 2022
 1
903410192Jan 01, 2021 Dec 31, 2021EP-A NO3 Chemical Late/Nonreporting - 1
Returned To Compliance - Sep 22, 2022
 5
903410191Nov 01, 2021 Nov 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Feb 09, 2022
 1
903410188Nov 01, 2021 Nov 30, 2021 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Dec 07, 2021
 1
903410187Oct 01, 2021 Oct 31, 2021 TCR Public Notice Late/Nonreporting (Viol # 903410179) - 1
Returned To Compliance - Mar 23, 2022
Returned To Compliance - Apr 03, 2023
 1
903410186Oct 01, 2021 Oct 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Feb 09, 2022
 1
903410179Oct 01, 2021 Oct 31, 2021 TCR Acute MCL for E. coli - 1
Returned To Compliance - Mar 23, 2022
 10
903410183Sep 01, 2021 Sep 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Feb 09, 2022
 1
903410180Sep 01, 2021 Sep 30, 2021 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Oct 07, 2021
 1
903410178Jul 01, 2021 Jul 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410175Jun 01, 2021 Jun 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410172Apr 01, 2021 Jun 30, 2021DIST-A DBP DBP Late/Nonreporting - 2  Show analytes
Returned To Compliance - Jul 20, 2021
 1
903410170May 01, 2021 May 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410167Apr 01, 2021 Apr 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410164Mar 01, 2021 Mar 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410161Feb 01, 2021 Feb 28, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410158Feb 01, 2021 Feb 28, 2021 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Mar 03, 2021
 1
903410157Jan 01, 2021 Jan 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410151Dec 01, 2020 Dec 31, 2020WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410148Oct 01, 2020 Dec 31, 2020DIST-A DBP DBP Late/Nonreporting - 2  Show analytes
Returned To Compliance - Mar 18, 2021
 1
903410146Nov 01, 2020 Nov 30, 2020WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
903410143Oct 01, 2020 Oct 31, 2020WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes
Returned To Compliance - Sep 10, 2021
 1
SYSTEM SCORE SUMMARY
Learn about system scores		Unaddressed Points:
Number of years the oldest violation has been unaddressed (n):
System Score:
Points under formal enforcement:
Points RTC'd: 		13
0
13
346
88

Violation history was last updated on 10/23/2025, 13 hours ago.

For questions regarding these violations contact either:

More information for this water system: SDWIS ID 3944
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