OHA Drinking Water Services
OR41
PWS ID: 94063 ---- WEST LINN/WILSONVILLE SD

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   5incomplete06/26/2022
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP for WELL ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,210 1 incomplete08/29/2025
EP-A  EP for WELL IOC notes9 Years 01/01/2020 - 12/31/2028 1,019 1 incomplete09/29/2014
EP-A  EP for WELL NITRATE  Yearly 01/01/2026 - 12/31/2026 288 1 incomplete08/29/2025
EP-A  EP for WELL NITRITE notes9 Years 01/01/2020 - 12/31/2028 1,019 1 incomplete09/29/2014
EP-A  EP for WELL PFAS notes6 Months 01/01/2026 - 06/30/2026 104 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP for WELL SOC  3 Years 01/01/2026 - 12/31/2028 1,019 1 incomplete08/29/2025
EP-A  EP for WELL VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,019 1 incomplete08/29/2025

5  secs
Show Only Active

Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  Distribution SystemLEAD & COPPER  3 Years01/01/200512/31/20105Sample Between June 1st and Sept 30th
DIST-A  Distribution SystemLEAD & COPPER  6 Months01/01/201107/01/20155
DIST-A  Distribution SystemLEAD & COPPER  Yearly01/01/200212/31/20045Sample Between June 1st and Sept 30th
DIST-A  Distribution SystemLEAD & COPPER  Yearly01/01/201612/31/20195Sample Between June 1st and Sept 30th
EP-A  EP for WELLARSENIC  3 Years01/01/200212/31/20161

Show Only Active