OHA Drinking Water Services
OR41
PWS ID: 94718 ---- CHEMICAL WASTE MGT OF NW 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 notes3 Years01/01/2028 - 12/31/2028   5 07/15/2025
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  Distribution System STAGE 2 DBP notesYearly 01/01/2026 - 12/31/2026 281 2 incomplete
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP for WELL ARSENIC notes9 Years01/01/2020 - 12/31/2028 1,012 1 done 04/06/2022
EP-A  EP for WELL IOC notes9 Years01/01/2020 - 12/31/2028 1,012 1 done 04/06/2022
EP-A  EP for WELL NITRATE  Yearly 01/01/2026 - 12/31/2026 281 1 incomplete02/24/2025
EP-A  EP for WELL NITRITE notes9 Years01/01/2020 - 12/31/2028 1,012 1 done 04/06/2022
EP-A  EP for WELL PFAS notes6 Months 01/01/2026 - 06/30/2026 97 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP for WELL SOC  3 Years 01/01/2026 - 12/31/2028 1,012 1 incomplete08/11/2025
EP-A  EP for WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,012 1 incomplete07/15/2025

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