OHA Drinking Water Services
OR41
PWS ID: 94811 ---- KNIFE RIVER PRESTRESS INC
Violation History

Violations are displayed for the last 5 years only.
Group Abbreviations:  GWR = Ground Water Rule, LCR = Lead & Copper Rule, NO3 = Nitrate, SOC = Synthetic Organic Chemicals, VOC = Volatile Organic Chemicals
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
903526915YJul 01, 2024 Sep 30, 2024EP-B NO3 Chemical Late/Nonreporting - 1 No Longer Required To Comply - Oct 20, 1992 5
903526913NApr 01, 2024 Sep 17, 2024 LCR Failure to Install CC Treatment - 1  Show analyte Returned To Compliance - Sep 17, 2024 5
903526966YJan 01, 2024 Dec 31, 2024EP-B SOC Chemical Late/Nonreporting - 29  Show analytes No Longer Required To Comply - Oct 20, 1992 1
903526937YJan 01, 2024 Dec 31, 2024EP-B VOC Chemical Late/Nonreporting - 21  Show analytes No Longer Required To Comply - Oct 20, 1992 1
903526916NJan 01, 2024 Dec 31, 2024SRC-BA GWR Source Assessment Sample - Late/Nonreporting - 1 No Longer Required To Comply - Oct 20, 1992 1
903526914NApr 01, 2024 Sep 17, 2024 LCR Public Notice Late/Nonreporting (Viol # 903526913) - 1  Show analyte Returned To Compliance - Sep 17, 2024 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: 		0
0
0
0
14

Violation history was last updated on 4/30/2026, 13 hours ago.

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