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 1,024 1 incomplete06/01/2015
DIST-A  DISTRIBUTION SYSTEM DBP2 HAA5 ONLY notesQuarterly 01/01/2026 - 03/31/2026 18 1 incomplete12/03/2025
DIST-A  DISTRIBUTION SYSTEM DBP2 TTHM ONLY notesQuarterly 01/01/2026 - 03/31/2026 18 1 incomplete12/03/2025
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 293 1 incomplete11/05/2025
EP-A  EP FOR INFILTRATION GALLERIES & WELLS IOC notes9 Years01/01/2020 - 12/31/2028 1,024 1 done 06/05/2024
EP-A  EP FOR INFILTRATION GALLERIES & WELLS NITRATE  Yearly 01/01/2026 - 12/31/2026 293 1 incomplete11/05/2025
EP-A  EP FOR INFILTRATION GALLERIES & WELLS NITRITE notes9 Years01/01/2020 - 12/31/2028 1,024 1 done 06/05/2024
EP-A  EP FOR INFILTRATION GALLERIES & WELLS PFAS notesQuarterly 01/01/2026 - 03/31/2026 18 1 incomplete
  Initial monitoring - 4 quarters only
EP-A  EP FOR INFILTRATION GALLERIES & WELLS RAD - GROSS ALPHA  9 Years 01/01/2023 - 12/31/2031 2,119 1 incomplete06/16/2021
EP-A  EP FOR INFILTRATION GALLERIES & WELLS RAD - RADIUM 226/228 9 Years 01/01/2023 - 12/31/2031 2,119 1 incomplete06/16/2021
EP-A  EP FOR INFILTRATION GALLERIES & WELLS RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,119 1 incomplete06/16/2021
EP-A  EP FOR INFILTRATION GALLERIES & WELLS SOC  3 Years 01/01/2026 - 12/31/2028 1,024 1 incomplete06/05/2024
EP-A  EP FOR INFILTRATION GALLERIES & WELLS VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 293 1 incomplete09/03/2025

5  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200409/30/20131Schedule Reflects 1 RT Sample Per QT Per WTP
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200212/31/200410Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/201906/30/201920
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  Yearly01/01/200512/31/201810Sample Between June 1st and Sept 30th
EP-A  EP FOR INFILTRATION GALLERIES & WELLSRAD - GROSS ALPHA  6 Years01/01/200812/31/20131
EP-A  EP FOR INFILTRATION GALLERIES & WELLSRAD - RADIUM 226/228  6 Years01/01/200812/31/20131
EP-A  EP FOR INFILTRATION GALLERIES & WELLSRAD - URANIUM  6 Years01/01/200812/31/20131
EP-A  EP FOR INFILTRATION GALLERIES & WELLSTOLUENE   Quarterly10/01/201706/30/20191
EP-A  EP FOR INFILTRATION GALLERIES & WELLSTOLUENE   Yearly01/01/202012/31/20221
EP-A  EP FOR INFILTRATION GALLERIES & WELLSVOLATILE ORGANICS  Yearly01/01/200212/31/20221
EP-B  EP FOR WELL #1 (GRAN 641)ARSENIC  3 Years01/01/200210/23/20091
EP-B  EP FOR WELL #1 (GRAN 641)IOC  9 Years01/01/200210/23/20091Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #1 (GRAN 641)NITRATE  Yearly01/01/200210/23/20091
EP-B  EP FOR WELL #1 (GRAN 641)NITRITE  9 Years01/01/200210/23/20091Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #1 (GRAN 641)SOC  3 Years01/01/200210/23/20091
EP-B  EP FOR WELL #1 (GRAN 641)VOLATILE ORGANICS  3 Years01/01/200210/23/20091

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