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		Auto-
RTC?		Monitoring Period
Begin
End 		Facility
ID		 Analyte
Group		 Violation Type - Analyte Count
Show analytes for all violations 		Enforcement Action - Date
Show history 		Points Contact
Report
903410306NAug 01, 2025 Aug 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Public Notice Required 10
903410299YJul 01, 2025 CCR CCR Late/Nonreporting - 1 1
903410305NMay 01, 2025 May 31, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410297) - 1  Show analyte 1
903410303NApr 01, 2025 Apr 30, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410294) - 1  Show analyte Partially addressed - Show analyte 1
903410298NMay 01, 2025 May 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410297NMay 01, 2025 May 31, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410295NApr 01, 2025 Apr 30, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410294NApr 01, 2025 Apr 30, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410292NMar 01, 2025 Mar 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410291NMar 01, 2025 Mar 31, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410288NFeb 01, 2025 Feb 28, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410287NFeb 01, 2025 Feb 28, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410286NJan 01, 2025 Jan 31, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410285NJan 01, 2025 Jan 31, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410284NDec 01, 2024 Dec 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410283NDec 01, 2024 Dec 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410282NNov 01, 2024 Nov 30, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410281NNov 01, 2024 Nov 30, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410275NMay 01, 2024 May 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410274NMay 01, 2024 May 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410273NApr 01, 2024 Apr 30, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410272NMar 01, 2024 Mar 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410271NMar 01, 2024 Mar 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410270NFeb 01, 2024 Feb 29, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410269NJan 01, 2024 Jan 31, 2024WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410268NJan 01, 2024 Jan 31, 2024WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410261NNov 01, 2023 Nov 30, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410260NNov 01, 2023 Nov 30, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410259NOct 01, 2023 Oct 31, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410258NOct 01, 2023 Oct 31, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410253NMay 01, 2023 May 31, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410252NMay 01, 2023 May 31, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410251NApr 01, 2023 Apr 30, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410250NApr 01, 2023 Apr 30, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410249NFeb 01, 2023 Feb 28, 2023WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410248NFeb 01, 2023 Feb 28, 2023WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Hide analyte
TURBIDITY
Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410236NNov 01, 2022 Nov 30, 2022WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410235NNov 01, 2022 Nov 30, 2022WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Bilateral Compliance Agreement Signed - Jul 24, 2024 10
903410092NDec 01, 2018 No Qualified Treatment Plant Operator - 1 Bilateral Compliance Agreement Signed - Jul 24, 2024 5 9/17/2019
903410096NDec 01, 2018 RL Public Notice Late/Nonreporting (Viol # 903410092) - 1 Bilateral Compliance Agreement Signed - Jul 24, 2024 1 9/17/2019
903410301NJun 01, 2025 Jun 30, 2025WTP-A SWTR Turbidity Standards Not Met (95% NTU) - 1  Show analyte Returned To Compliance - Aug 06, 2025 10
903410300NJun 01, 2025 Jun 30, 2025WTP-A SWTR Turbidity Standards Not Met (Max NTU) - 1  Show analyte Returned To Compliance - Aug 06, 2025 10
903410231NOct 01, 2022 Oct 31, 2022 TCR Acute MCL for E. coli - 1 Returned To Compliance - Nov 16, 2022 10
903410179NOct 01, 2021 Oct 31, 2021 TCR Acute MCL for E. coli - 1 Returned To Compliance - Mar 23, 2022 10
903410192YJan 01, 2021 Dec 31, 2021EP-A NO3 Chemical Late/Nonreporting - 1 Returned To Compliance - Sep 22, 2022 5
903410308NJun 01, 2025 Jun 30, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410300) - 1  Show analyte Returned To Compliance - Sep 14, 2025 1
903410293NFeb 01, 2025 Feb 28, 2025 SWTR Public Notice Late/Nonreporting (Viol # 903410288) - 1  Show analyte Returned To Compliance - Apr 16, 2025 1
903410290NDec 01, 2024 Dec 31, 2024 SWTR Public Notice Late/Nonreporting (Viol # 903410283) - 1  Show analyte Returned To Compliance - Feb 20, 2025 1
903410289NNov 01, 2024 Nov 30, 2024 SWTR Public Notice Late/Nonreporting (Viol # 903410281) - 1  Show analyte Returned To Compliance - Feb 20, 2025 1
903410280YOct 01, 2024 Oct 16, 2024 CCR CCR Certification Late/Nonreporting - 1 Returned To Compliance - Oct 16, 2024 1
903410276YJul 01, 2024 Oct 16, 2024 CCR CCR Late/Nonreporting - 1 Returned To Compliance - Oct 16, 2024 1
903410279YAug 01, 2024 Aug 31, 2024WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Oct 02, 2024 1
903410267YJan 01, 2024 Jan 31, 2024WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Mar 04, 2024 1
903410264YDec 01, 2023 Dec 31, 2023WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Mar 04, 2024 1
903410257YOct 01, 2023 Oct 12, 2023 CCR CCR Certification Late/Nonreporting - 1 Returned To Compliance - Oct 12, 2023 1
903410256YJun 01, 2023 Jun 30, 2023WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Aug 10, 2023 1
903410244YFeb 01, 2023 Feb 28, 2023 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Mar 06, 2023 1
903410247YJan 01, 2023 Jan 31, 2023WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Mar 10, 2023 1
903410241YDec 01, 2022 Dec 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Feb 13, 2023 1
903410242YNov 01, 2022 Nov 30, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Feb 13, 2023 1
903410234YOct 01, 2022 Oct 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Feb 13, 2023 1
903410230YSep 01, 2022 Sep 30, 2022 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Oct 31, 2022 1
903410229YAug 01, 2022 Aug 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Oct 10, 2022 1
903410226YJul 01, 2022 Jul 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Oct 10, 2022 1
903410223YJun 01, 2022 Jun 30, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Oct 10, 2022 1
903410220YMay 01, 2022 May 31, 2022 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Jun 03, 2022 1
903410219YMar 01, 2022 Mar 31, 2022WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - May 10, 2022 1
903410216YDec 01, 2021 Dec 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Feb 09, 2022 1
903410213YJan 01, 2021 Dec 31, 2021EP-A VOC Chemical Late/Nonreporting - 21  Show analytes Returned To Compliance - Oct 10, 2022 1
903410191YNov 01, 2021 Nov 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Feb 09, 2022 1
903410188YNov 01, 2021 Nov 30, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Dec 07, 2021 1
903410187NOct 01, 2021 Oct 31, 2021 TCR Public Notice Late/Nonreporting (Viol # 903410179) - 1 Returned To Compliance - Mar 23, 2022 1
903410186YOct 01, 2021 Oct 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Feb 09, 2022 1
903410183YSep 01, 2021 Sep 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Feb 09, 2022 1
903410180YSep 01, 2021 Sep 30, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Oct 07, 2021 1
903410178YJul 01, 2021 Jul 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410175YJun 01, 2021 Jun 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410172YApr 01, 2021 Jun 30, 2021DIST-A DBP DBP Late/Nonreporting - 2  Show analytes Returned To Compliance - Jul 20, 2021 1
903410170YMay 01, 2021 May 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410167YApr 01, 2021 Apr 30, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410164YMar 01, 2021 Mar 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410161YFeb 01, 2021 Feb 28, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410158YFeb 01, 2021 Feb 28, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Mar 03, 2021 1
903410157YJan 01, 2021 Jan 31, 2021WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410151YDec 01, 2020 Dec 31, 2020WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410148YOct 01, 2020 Dec 31, 2020DIST-A DBP DBP Late/Nonreporting - 2  Show analytes Returned To Compliance - Mar 18, 2021 1
903410146YNov 01, 2020 Nov 30, 2020WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Returned To Compliance - Sep 10, 2021 1
903410143YOct 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, 19 hours ago.

For questions regarding these violations contact either:

More information for this water system: SDWIS ID 3944
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