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
Gray shading indicates return to compliance. 

Show Auto-RTC  |  Show Determination Dates
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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
Show history 		Points Contact
Report
583Sep 01, 2025 Sep 30, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
582Aug 01, 2025 Aug 31, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes 1
580Aug 01, 2025 Aug 31, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
579Jul 01, 2025 Jul 31, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes 1
577Jul 01, 2025 Jul 31, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
576Jun 01, 2025 Jun 30, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes 1
574Jun 01, 2025 Jun 30, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
573May 01, 2025 May 31, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes 1
570May 01, 2025 May 31, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
569Apr 01, 2025 Apr 30, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 2  Show analytes 1
567Apr 01, 2025 Apr 30, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
566Mar 01, 2025 Mar 31, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes 1
563Mar 01, 2025 Mar 31, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
561Feb 01, 2025 Feb 28, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Hide analytes
SWTR
TURBIDITY
UV ABSORBANCE @254 NM
1
557Feb 01, 2025 Feb 28, 2025 TCR Routine Coliform - Did Not Report ANY - 1 1
571Feb 23, 2025 Public Notice Late/Nonreporting (Viol # 562) - 1 1
562Feb 23, 2025 Coliform Investigation Nonreporting - 1 Public Notice Required 5
558Jan 01, 2025 Jan 31, 2025WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes 1
548Jan 08, 2025 Jan 19, 2025DIST-A GWR Source Sample - Late/Nonreporting - 1 1
553Dec 01, 2024 Dec 31, 2024WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes 1
547Jan 01, 2024 Dec 31, 2024CH-A GWR Source Assessment Sample - Late/Nonreporting - 1 1
554Nov 01, 2024 Nov 30, 2024WTP-A SWTR Monthly SW Report - Late/Nonreporting - 3  Show analytes 1
541May 01, 2022 May 31, 2022 TCR Acute MCL for E. coli - 1 Returned To Compliance - Jun 01, 2024 10
540Jan 01, 2021 Dec 31, 2021EP-A NO3 Chemical Late/Nonreporting - 1 Returned To Compliance - Feb 16, 2022 5
539Dec 01, 2021 Dec 31, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Jan 21, 2022 1
538Apr 01, 2021 Jun 30, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Aug 12, 2021 1
537Jan 01, 2021 Mar 31, 2021 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Aug 12, 2021 1
536Oct 01, 2020 Dec 31, 2020 TCR Routine Coliform - Did Not Report ANY - 1 Returned To Compliance - Aug 12, 2021 1
535Jan 01, 2020 Dec 31, 2020CH-A GWR Source Assessment Sample - Late/Nonreporting - 1 Returned To Compliance - Dec 22, 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: 		26
0
26
0
20

Violation history was last updated on 10/24/2025, 70 hours ago.

For questions regarding these violations contact either:

More information for this water system: SDWIS ID 4861
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