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

See also: Coliform Schedules

Chemical Sampling Schedule Status
Facility
ID		 Analyte or Group   Sampling
Interval		 Monitoring Period Days
Until
End		 Samples
Required		 Samples
Received		 Last
Sample
Date
Start End
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notesYearly01/01/2025 - 12/31/2025 175 5 done 08/20/2024
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesYearly01/01/2025 - 12/31/2025 175 1 done 06/03/2025
 Seasonal sampling period:  06/01  thru  06/30
EP-A  EP FOR WELL #4 ARSENIC  9 Years 01/01/2017 - 12/31/2025 175 1 incomplete09/07/2016
EP-A  EP FOR WELL #4 IOC notes9 Years 01/01/2017 - 12/31/2025 175 1 incomplete09/07/2016
EP-A  EP FOR WELL #4 NITRATE  Yearly 01/01/2025 - 12/31/2025 175 1 incomplete10/09/2024
EP-A  EP FOR WELL #4 NITRITE notes9 Years 01/01/2017 - 12/31/2025 175 1 incomplete09/07/2016
EP-A  EP FOR WELL #4 SOC  3 Years01/01/2023 - 12/31/2025 175 1 done 08/20/2024
EP-A  EP FOR WELL #4 VOLATILE ORGANICS  3 Years01/01/2023 - 12/31/2025 175 1 done 08/20/2024

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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200512/31/20235Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/202412/31/20245
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  Yearly01/01/200212/31/20035Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  3 Years01/01/202212/31/20231Sample in June
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/201407/31/20211Sample in July
EP-A  EP FOR WELL #4ARSENIC  3 Years01/01/200212/31/20161
EP-A  EP FOR WELL #4IOC  3 Years01/01/200212/31/20071
EP-A  EP FOR WELL #4NITRITE  3 Years01/01/200212/31/20071
EP-B  EP FOR WELL #1ARSENIC  3 Years01/01/202309/03/20241
EP-B  EP FOR WELL #1IOC  3 Years01/01/202309/03/20241
EP-B  EP FOR WELL #1NITRATE  Quarterly07/01/202409/03/20241
EP-B  EP FOR WELL #1NITRATE  Yearly01/01/202404/30/20241
EP-B  EP FOR WELL #1NITRITE  3 Years01/01/202309/03/20241
EP-B  EP FOR WELL #1SOC  Yearly01/01/202409/03/20241
EP-B  EP FOR WELL #1VOLATILE ORGANICS  Yearly01/01/202409/03/20241

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