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 2,125 1 incomplete08/02/2021
EP-A  EP for WELL IOC notes9 Years01/01/2020 - 12/31/2028 1,030 1 done 08/02/2021
EP-A  EP for WELL NITRATE  Yearly 01/01/2026 - 12/31/2026 299 1 incomplete01/13/2025
EP-A  EP for WELL NITRITE notes9 Years01/01/2020 - 12/31/2028 1,030 1 done 08/02/2021
EP-A  EP for WELL PFAS notes6 Months 01/01/2026 - 06/30/2026 115 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP for WELL SOC  3 Years 01/01/2026 - 12/31/2028 1,030 1 incomplete06/02/2025
EP-A  EP for WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,030 1 incomplete06/02/2025

7  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  Distribution SystemLEAD & COPPER  3 Years01/01/200212/31/20045Sample Between June 1st and Sept 30th
DIST-A  Distribution SystemLEAD & COPPER  3 Years01/01/200812/31/20135
DIST-A  Distribution SystemLEAD & COPPER  6 Months01/01/200512/31/20055
DIST-A  Distribution SystemLEAD & COPPER  6 Months01/01/201412/31/20165
EP-A  EP for WELLARSENIC  3 Years01/01/200212/31/20131
EP-A  EP for WELLNITRATE  Quarterly04/01/200509/30/20121
EP-A  EP for WELLNITRATE  Yearly01/01/200203/31/20051Has NO3 Treatment as of 05/01/2002 - Sample in the 4th Quarter

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More information for this water system: SDWIS ID 1907
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