OHA Drinking Water Services
OR41
PWS ID: 94718 ---- CHEMICAL WASTE MGT OF NW INC
Violation History

Violations are displayed for the last 5 years only.
Group Abbreviations:  GWR = Ground Water Rule, TCR = Total Coliform Rule
Gray shading indicates return to compliance. 

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Violation
Number
Auto-
RTC?
Monitoring Period
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End
Facility
ID
Analyte
Group
Violation Type - Analyte Count
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Enforcement Action - Date
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903502114NSep 15, 2025 Sep 26, 2025DIST-A GWR Source Sample - Late/Nonreporting - 1 1
903502118YDec 01, 2025 Dec 31, 2025 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Jan 30, 2026
1
903502117YNov 01, 2025 Nov 30, 2025 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Jan 30, 2026
1
903502116YOct 01, 2025 Oct 31, 2025 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Jan 30, 2026
1
903502113YDec 01, 2024 Dec 31, 2024 TCR Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Jan 23, 2025
1
903502112NNov 26, 2024 Dec 07, 2024DIST-A GWR Source Sample - Late/Nonreporting - 1
Returned To Compliance - Dec 19, 2024
1
903502110NOct 14, 2024 Oct 25, 2024DIST-A GWR Source Sample - Late/Nonreporting - 1
Returned To Compliance - Nov 01, 2024
1
903502109YAug 01, 2024 Aug 31, 2024 TCR Temporary Routine Coliform - Did Not Report ANY - 1
Returned To Compliance - Sep 26, 2024
1
903502108YJul 01, 2024 Jul 31, 2024 TCR Temporary Routine Coliform - Did Not Report Enough - 1
Returned To Compliance - Sep 26, 2024
1
903502107NJun 24, 2024 Jul 05, 2024DIST-A GWR Source Sample - Late/Nonreporting - 1
Returned To Compliance - Aug 09, 2024
1
SYSTEM SCORE SUMMARY
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Unaddressed Points:
Number of years the oldest violation has been unaddressed (n):
System Score:
Points under formal enforcement:
Points RTC'd:
1
0
1
0
9

Violation history was last updated on 5/7/2026, 4 hours ago.

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