OHA Drinking Water Services
OR41
PWS ID: 94403 ---- COLUMBIA PLYWOOD CORP

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 Years01/01/2027 - 12/31/2027   5 07/30/2024
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP FOR NORTH WELL ARSENIC  9 Years 01/01/2026 - 12/31/2034 3,177 1 incomplete08/12/2025
EP-A  EP FOR NORTH WELL IOC  9 Years 01/01/2026 - 12/31/2034 3,177 1 incomplete08/12/2025
EP-A  EP FOR NORTH WELL NITRATE  Yearly 01/01/2026 - 12/31/2026 255 1 incomplete08/12/2025
EP-A  EP FOR NORTH WELL NITRITE  9 Years 01/01/2026 - 12/31/2034 3,177 1 incomplete08/12/2025
EP-A  EP FOR NORTH WELL PFAS notes6 Months 01/01/2026 - 06/30/2026 71 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR NORTH WELL SOC  3 Years 01/01/2026 - 12/31/2028 986 1 incomplete08/12/2025
EP-A  EP FOR NORTH WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 986 1 incomplete08/12/2025

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