OHA Drinking Water Services
OR41
PWS ID: 06204 ---- KNIFE RIVER MATERIALS - CENTRAL OREGON

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 notes3 Years01/01/2026 - 12/31/2026   5 07/31/2025
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP FOR WELLS ARSENIC  3 Years 01/01/2026 - 12/31/2028 1,002 1 incomplete05/13/2025
EP-A  EP FOR WELLS IOC  3 Years 01/01/2026 - 12/31/2028 1,002 1 incomplete05/13/2025
EP-A  EP FOR WELLS NITRATE  Yearly01/01/2026 - 12/31/2026 271 1 done 01/06/2026
EP-A  EP FOR WELLS NITRITE  3 Years 01/01/2026 - 12/31/2028 1,002 1 incomplete05/13/2025
EP-A  EP FOR WELLS PFAS notes6 Months 01/01/2026 - 06/30/2026 87 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR WELLS SOC  3 Years 01/01/2026 - 12/31/2028 1,002 1 incomplete07/31/2025
EP-A  EP FOR WELLS VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,002 1 incomplete07/31/2025

6  secs
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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months07/01/201806/30/20195
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  Yearly01/01/202012/31/20225sample between June 1 and Sept. 30
EP-A  EP FOR WELLSARSENIC  Quarterly01/01/201103/31/20111One Sample Per Source is Required
EP-A  EP FOR WELLSSOC  Yearly01/01/201812/31/20221
EP-A  EP FOR WELLSVOLATILE ORGANICS  Yearly01/01/201812/31/20221

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