OHA Drinking Water Services
OR41
PWS ID: 00673 ---- PRAIRIE CITY

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
DIST-A  DISTRIBUTION SYSTEM ASBESTOS, DIST notes9 Years 01/01/2020 - 12/31/2028 970 1 incomplete06/01/2015
DIST-A  DISTRIBUTION SYSTEM DBP2 HAA5 ONLY notesQuarterly 04/01/2026 - 06/30/2026 55 1 incomplete03/19/2026
DIST-A  DISTRIBUTION SYSTEM DBP2 TTHM ONLY notesQuarterly 04/01/2026 - 06/30/2026 55 1 incomplete03/19/2026
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2028 - 12/31/2028   10 08/30/2025
  Seasonal sampling period:   06/01   thru   09/30
EP-A  EP FOR INFILTRATION GALLERIES & WELLS ARSENIC  Yearly 01/01/2026 - 12/31/2026 239 1 incomplete11/05/2025
EP-A  EP FOR INFILTRATION GALLERIES & WELLS IOC notes9 Years01/01/2020 - 12/31/2028 970 1 done 06/05/2024
EP-A  EP FOR INFILTRATION GALLERIES & WELLS NITRATE  Yearly 01/01/2026 - 12/31/2026 239 1 incomplete11/05/2025
EP-A  EP FOR INFILTRATION GALLERIES & WELLS NITRITE notes9 Years01/01/2020 - 12/31/2028 970 1 done 06/05/2024
EP-A  EP FOR INFILTRATION GALLERIES & WELLS PFAS notesQuarterly04/01/2026 - 06/30/2026 55 1 done 04/01/2026
  Initial monitoring - 4 quarters only
EP-A  EP FOR INFILTRATION GALLERIES & WELLS RAD - GROSS ALPHA  9 Years 01/01/2023 - 12/31/2031 2,065 1 incomplete06/16/2021
EP-A  EP FOR INFILTRATION GALLERIES & WELLS RAD - RADIUM 226/228 9 Years 01/01/2023 - 12/31/2031 2,065 1 incomplete06/16/2021
EP-A  EP FOR INFILTRATION GALLERIES & WELLS RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,065 1 incomplete06/16/2021
EP-A  EP FOR INFILTRATION GALLERIES & WELLS SOC  3 Years 01/01/2026 - 12/31/2028 970 1 incomplete06/05/2024
EP-A  EP FOR INFILTRATION GALLERIES & WELLS VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 239 1 incomplete09/03/2025

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