OHA Drinking Water Services
OR41
PWS ID: 95243 ---- DIAMOND LAKE GAS STATION
Violation History

Violations are displayed for the last 5 years only.
Group Abbreviations:  GWR = Ground Water Rule, NO3 = Nitrate, SWTR = Surface Water Treatment Rule, TCR = Total Coliform Rule
Purple shading indicates formal enforcement.  Gray shading indicates return to compliance. 

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Violation
Number		Auto-
RTC?		Monitoring Period
Begin
End 		Determination
Date		Facility
ID		 Analyte
Group		 Violation Type - Analyte Count
Show analytes for all violations 		Enforcement Action - Date
Show history 		Points Contact
Report
600YJan 01, 2025 Dec 31, 2025Mar 18, 2026EP-A NO3 Chemical Late/Nonreporting - 1 5
599YFeb 01, 2026 Feb 28, 2026Mar 11, 2026 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
596YJan 01, 2026 Jan 31, 2026Mar 05, 2026WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
592YJan 01, 2026 Jan 31, 2026Feb 11, 2026 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
598YDec 01, 2025 Dec 31, 2025Mar 05, 2026WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
591YDec 01, 2025 Dec 31, 2025Jan 12, 2026 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
590NJan 01, 2025 Dec 31, 2025Jan 12, 2026CH-A GWR Source Assessment Sample - Late/Nonreporting - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
594YNov 01, 2025 Nov 30, 2025Feb 11, 2026WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
587YNov 01, 2025 Nov 30, 2025Dec 11, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
589YOct 01, 2025 Oct 31, 2025Dec 31, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
584YOct 01, 2025 Oct 31, 2025Nov 13, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
586YSep 01, 2025 Sep 30, 2025Nov 13, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
583YSep 01, 2025 Sep 30, 2025Oct 14, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
582YAug 01, 2025 Aug 31, 2025Sep 30, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
580YAug 01, 2025 Aug 31, 2025Sep 15, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
579YJul 01, 2025 Jul 31, 2025Aug 28, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
577YJul 01, 2025 Jul 31, 2025Aug 11, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
576YJun 01, 2025 Jun 30, 2025Jul 23, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
574YJun 01, 2025 Jun 30, 2025Jul 11, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
573YMay 01, 2025 May 31, 2025Jun 30, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
570YMay 01, 2025 May 31, 2025Jun 11, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
569YApr 01, 2025 Apr 30, 2025May 21, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
567YApr 01, 2025 Apr 30, 2025May 12, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
566YMar 01, 2025 Mar 31, 2025Apr 22, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
563YMar 01, 2025 Mar 31, 2025Apr 11, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
561YFeb 01, 2025 Feb 28, 2025Apr 02, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
557YFeb 01, 2025 Feb 28, 2025Mar 11, 2025 TCR Routine Coliform - Did Not Report ANY - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
571NFeb 23, 2025 Jun 30, 2025 Public Notice Late/Nonreporting (Viol # 562) - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
562NFeb 23, 2025 Apr 02, 2025 Coliform Investigation Nonreporting - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 5
558YJan 01, 2025 Jan 31, 2025Apr 02, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
548NJan 08, 2025 Jan 19, 2025Jan 21, 2025DIST-A GWR Source Sample - Late/Nonreporting - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
553YDec 01, 2024 Dec 31, 2024Feb 04, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Hide analytes
SWTR
TURBIDITY
UV ABSORBANCE @254 NM
Bilateral Compliance Agreement Signed - Oct 29, 2025 1
547NJan 01, 2024 Dec 31, 2024Jan 13, 2025CH-A GWR Source Assessment Sample - Late/Nonreporting - 1 Bilateral Compliance Agreement Signed - Oct 29, 2025 1
554YNov 01, 2024 Nov 30, 2024Feb 04, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes Bilateral Compliance Agreement Signed - Oct 29, 2025 1
541NMay 01, 2022 May 31, 2022May 16, 2022 TCR Acute MCL for E. coli - 1 Returned To Compliance - Jun 01, 2024 10
540YJan 01, 2021 Dec 31, 2021Jan 24, 2022EP-A NO3 Chemical Late/Nonreporting - 1 Returned To Compliance - Feb 16, 2022 5
539YDec 01, 2021 Dec 31, 2021Jan 11, 2022 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Jan 21, 2022 1
538YApr 01, 2021 Jun 30, 2021Jul 12, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Aug 12, 2021 1
537YJan 01, 2021 Mar 31, 2021Apr 12, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Aug 12, 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: 		5
0
5
37
18

Violation history was last updated on 3/25/2026, 20 hours ago.

For questions regarding these violations contact either: