OHA Drinking Water Services
OR41
PWS ID: 00954 ---- WILSONVILLE, CITY OF

See also: Coliform Schedules  ::  LT2 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
CH-H  COMMON HEADER FOR WTP-H TOC & ALKALINITY notesQuarterly 07/01/2025 - 09/30/2025 73 1 incomplete04/02/2025
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2027 - 12/31/2027   30 07/30/2024
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 07/01/2025 - 09/30/2025 73 4 incomplete05/15/2025
EP-H  EP FOR WILLAMETTE RIVERBROMATE notesQuarterly07/01/2025 - 09/30/2025 73 1 incomplete 04/02/2025
EP-H  EP FOR WILLAMETTE RIVER ARSENIC notes9 Years01/01/2017 - 12/31/2025 165 1 done 01/11/2023
EP-H  EP FOR WILLAMETTE RIVER IOC notes9 Years01/01/2020 - 12/31/2028 1,261 1 done 01/11/2023
EP-H  EP FOR WILLAMETTE RIVER NITRATE  Yearly01/01/2025 - 12/31/2025 165 1 done 01/27/2025
EP-H  EP FOR WILLAMETTE RIVER NITRITE notes9 Years01/01/2020 - 12/31/2028 1,261 1 done 01/27/2025
EP-H  EP FOR WILLAMETTE RIVER RAD - GROSS ALPHA  9 Years 01/01/2023 - 12/31/2031 2,356 1 incomplete04/25/2022
EP-H  EP FOR WILLAMETTE RIVER RAD - RADIUM 226/228 9 Years 01/01/2023 - 12/31/2031 2,356 1 incomplete04/25/2022
EP-H  EP FOR WILLAMETTE RIVER RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,356 1 incomplete04/25/2022
EP-H  EP FOR WILLAMETTE RIVER SOC notes3 Years01/01/2023 - 12/31/2025 165 1 done 01/11/2023
EP-H  EP FOR WILLAMETTE RIVER VOLATILE ORGANICS  Yearly01/01/2025 - 12/31/2025 165 1 done 01/27/2025
SRC-HA  WILLAMETTE RIVER CYANOTOXINS  2 Weeks07/13/2025 - 07/26/2025 7 1 done 07/14/2025
 Seasonal sampling period:  05/01  thru  10/31
WTP-H  TP FOR WILLAMETTE RIVERTOTAL ORGANIC CARBON Quarterly07/01/2025 - 09/30/2025 73 1 incomplete 04/02/2025

16  secs
Show Expired



More information for this water system: SDWIS ID 4377

Information for all water systems:

Main menu:
Need help? Email Drinking Water Services for assistance.Staff/Partner Login