OHA Drinking Water Services
OR41
PWS ID: 00935 ---- WASCO, CITY OF

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 08/11/2025
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP for WELL #1 ARSENIC notes9 Years01/01/2023 - 12/31/2031 2,086 1 done 06/01/2023
EP-A  EP for WELL #1 IOC notes9 Years01/01/2020 - 12/31/2028 991 1 done 06/01/2023
EP-A  EP for WELL #1 NITRATE  Yearly 01/01/2026 - 12/31/2026 260 1 incomplete04/03/2025
EP-A  EP for WELL #1 NITRITE notes9 Years01/01/2020 - 12/31/2028 991 1 done 06/01/2023
EP-A  EP for WELL #1 PFAS notes6 Months 01/01/2026 - 06/30/2026 76 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP for WELL #1 RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,182 1 incomplete06/01/2023
EP-A  EP for WELL #1 RAD - RADIUM 226/228 9 Years 01/01/2023 - 12/31/2031 2,086 1 incomplete04/07/2022
EP-A  EP for WELL #1 RAD - URANIUM  9 Years01/01/2023 - 12/31/2031 2,086 1 done 06/01/2023
EP-A  EP for WELL #1 SOC  3 Years 01/01/2026 - 12/31/2028 991 1 incomplete04/03/2025
EP-A  EP for WELL #1 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 991 1 incomplete04/03/2025
EP-B  EP FOR WELL #2 ARSENIC notes9 Years 01/01/2023 - 12/31/2031 2,086 1 incomplete04/15/2019
EP-B  EP FOR WELL #2 IOC notes9 Years 01/01/2020 - 12/31/2028 991 1 incomplete04/15/2019
EP-B  EP FOR WELL #2 NITRATE  Yearly 01/01/2026 - 12/31/2026 260 1 incomplete04/03/2025
EP-B  EP FOR WELL #2 NITRITE notes9 Years 01/01/2020 - 12/31/2028 991 1 incomplete04/15/2019
EP-B  EP FOR WELL #2 PFAS notes6 Months 01/01/2026 - 06/30/2026 76 1 incomplete01/18/2022
  Initial monitoring - 2 samples only
EP-B  EP FOR WELL #2 RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,182 1 incomplete04/03/2025
EP-B  EP FOR WELL #2 RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,182 1 incomplete04/03/2025
EP-B  EP FOR WELL #2 RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,086 1 incomplete12/13/2016
EP-B  EP FOR WELL #2 SOC  3 Years 01/01/2026 - 12/31/2028 991 1 incomplete04/03/2025
EP-B  EP FOR WELL #2 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 991 1 incomplete06/01/2023

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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  Distribution SystemHAA5 & TTHM  Yearly01/01/200401/02/20041Sample during the month of warmest water temperature. System discontinued disinfection 01/01/2004.
EP-A  EP for WELL #1ARSENIC  3 Years01/01/200212/31/20131
EP-A  EP for WELL #1RAD - RADIUM 226/228  6 Years01/01/200812/31/20131
EP-A  EP for WELL #1RAD - URANIUM  6 Years01/01/200812/31/20131
EP-B  EP FOR WELL #2ARSENIC  3 Years01/01/200212/31/20131
EP-B  EP FOR WELL #2DI(2-ETHYLHEXYL) PHTHALATE   Quarterly01/01/200806/30/20081Schedule Reflects Increased Monitoring
EP-B  EP FOR WELL #2DI(2-ETHYLHEXYL) PHTHALATE   Yearly01/01/200912/31/20121to be collected in 4th quarter
EP-B  EP FOR WELL #2RAD - URANIUM  6 Years01/01/200812/31/20131
EP-B  EP FOR WELL #2SOC  3 Years01/01/200212/31/20131
EP-B  EP FOR WELL #2TOLUENE   Yearly01/01/200812/31/20121
EP-B  EP FOR WELL #2VOLATILE ORGANICS  3 Years01/01/200212/31/20131

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