OHA Drinking Water Services
OR41
PWS ID: 00958 ---- YONCALLA, 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-A  COMMON HEADER FOR WTP-A TOC & ALKALINITY  Quarterly 04/01/2026 - 06/30/2026 79 1 incomplete01/13/2026
DIST-A  Distribution System ASBESTOS, DIST notes9 Years 01/01/2020 - 12/31/2028 994 1 incomplete07/17/2019
DIST-A  Distribution System DBP2 HAA5 ONLY notesYearly01/01/2026 - 12/31/2026 263 1 done 01/06/2026
  Seasonal sampling period:   01/01   thru   01/31
DIST-A  Distribution System DBP2 TTHM ONLY notesYearly 01/01/2026 - 12/31/2026 263 1 incomplete07/01/2025
  Seasonal sampling period:   07/01   thru   07/31
DIST-A  Distribution System LEAD & COPPER notes3 Years01/01/2026 - 12/31/2026   10incomplete06/20/2023
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP FOR WILSON & ADAMS CREEKS ARSENIC  9 Years 01/01/2020 - 12/31/2028 994 1 incomplete05/09/2019
EP-A  EP FOR WILSON & ADAMS CREEKS IOC notes9 Years 01/01/2020 - 12/31/2028 994 1 incomplete05/09/2019
EP-A  EP FOR WILSON & ADAMS CREEKS NITRATE  Yearly 01/01/2026 - 12/31/2026 263 1 incomplete10/07/2025
EP-A  EP FOR WILSON & ADAMS CREEKS NITRITE notes9 Years 01/01/2020 - 12/31/2028 994 1 incomplete05/09/2019
EP-A  EP FOR WILSON & ADAMS CREEKS PFAS notesQuarterly 04/01/2026 - 06/30/2026 79 1 incomplete12/17/2025
  Initial monitoring - 4 quarters only
EP-A  EP FOR WILSON & ADAMS CREEKS RAD - GROSS ALPHA  9 Years 01/01/2023 - 12/31/2031 2,089 1 incomplete10/27/2022
EP-A  EP FOR WILSON & ADAMS CREEKS RAD - RADIUM 226/228 9 Years 01/01/2023 - 12/31/2031 2,089 1 incomplete05/09/2019
EP-A  EP FOR WILSON & ADAMS CREEKS RAD - URANIUM  9 Years 01/01/2020 - 12/31/2028 994 1 incomplete11/21/2019
EP-A  EP FOR WILSON & ADAMS CREEKS SOC  3 Years 01/01/2026 - 12/31/2028 994 1 incomplete10/07/2025
EP-A  EP FOR WILSON & ADAMS CREEKS VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 263 1 incomplete10/07/2025
WTP-A  TP FOR WILSON & ADAMS CREEKSTOTAL ORGANIC CARBON Quarterly04/01/2026 - 06/30/2026 79 1 incomplete 01/13/2026

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