OHA Drinking Water Services
OR41
PWS ID: 94717 ---- COLUMBIA RIVER PUD

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   5incomplete07/26/2023
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP for WELL ARSENIC  9 Years 01/01/2023 - 12/31/2031 2,080 1 incomplete08/02/2021
EP-A  EP for WELL IOC notes9 Years01/01/2020 - 12/31/2028 985 1 done 08/02/2021
EP-A  EP for WELL NITRATE  Yearly01/01/2026 - 12/31/2026 254 1 done 02/02/2026
EP-A  EP for WELL NITRITE notes9 Years01/01/2020 - 12/31/2028 985 1 done 08/02/2021
EP-A  EP for WELL PFAS notes6 Months01/01/2026 - 06/30/2026 70 1 done 01/07/2026
  Initial monitoring - 2 samples only
EP-A  EP for WELL SOC  3 Years 01/01/2026 - 12/31/2028 985 1 incomplete06/02/2025
EP-A  EP for WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 985 1 incomplete06/02/2025

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