OHA Drinking Water Services
OR41
PWS ID: 95630 ---- COLUMBIA HELICOPTERS

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 notes6 Months 01/01/2026 - 06/30/2026 72 10 incomplete09/11/2025
EP-A  EP FOR WELL #1 ARSENIC  3 Years01/01/2026 - 12/31/2028 987 1 done 01/28/2026
EP-A  EP FOR WELL #1 IOC  3 Years01/01/2026 - 12/31/2028 987 1 done 01/28/2026
EP-A  EP FOR WELL #1 NITRATE  Yearly01/01/2026 - 12/31/2026 256 1 done 01/28/2026
EP-A  EP FOR WELL #1 NITRITE  3 Years01/01/2026 - 12/31/2028 987 1 done 01/28/2026
EP-A  EP FOR WELL #1 PFAS notes6 Months 01/01/2026 - 06/30/2026 72 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR WELL #1 SOC  Yearly01/01/2026 - 12/31/2026 256 1 done 01/20/2026
EP-A  EP FOR WELL #1 VOLATILE ORGANICS  Yearly01/01/2026 - 12/31/2026 256 1 done 01/20/2026
EP-B  EP FOR WELL #2 ARSENIC  3 Years01/01/2026 - 12/31/2028 987 1 done 01/28/2026
EP-B  EP FOR WELL #2 IOC  3 Years01/01/2026 - 12/31/2028 987 1 done 01/28/2026
EP-B  EP FOR WELL #2 NITRATE  Yearly01/01/2026 - 12/31/2026 256 1 done 01/28/2026
EP-B  EP FOR WELL #2 NITRITE  3 Years01/01/2026 - 12/31/2028 987 1 done 01/28/2026
EP-B  EP FOR WELL #2 PFAS notes6 Months 01/01/2026 - 06/30/2026 72 1 incomplete
  Initial monitoring - 2 samples only
EP-B  EP FOR WELL #2 SOC  Yearly01/01/2026 - 12/31/2026 256 1 done 01/20/2026
EP-B  EP FOR WELL #2 VOLATILE ORGANICS  Yearly01/01/2026 - 12/31/2026 256 1 done 01/20/2026

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