OHA Drinking Water Services
OR41
PWS ID: 91556 ---- CASCADE GORGE PROPERTIES

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 LEAD & COPPER  6 Months 01/01/2026 - 06/30/2026 96 5 incomplete06/04/2025
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 5 1 incomplete10/09/2025
EP-A  EP FOR WELL AND CREEK ARSENIC notesYearly 01/01/2026 - 12/31/2026 280 1 incomplete04/02/2025
EP-A  EP FOR WELL AND CREEK IOC  Yearly 01/01/2026 - 12/31/2026 280 1 incomplete01/27/2025
EP-A  EP FOR WELL AND CREEK NITRATE  Yearly 01/01/2026 - 12/31/2026 280 1 incomplete01/27/2025
EP-A  EP FOR WELL AND CREEK NITRITE  Yearly 01/01/2026 - 12/31/2026 280 1 incomplete01/27/2025
EP-A  EP FOR WELL AND CREEK PFAS notesQuarterly 01/01/2026 - 03/31/2026 5 1 incomplete
  Initial monitoring - 4 quarters only
EP-A  EP FOR WELL AND CREEK RAD - GROSS ALPHA  6 Years 01/01/2026 - 12/31/2031 2,106 1 incomplete03/27/2024
EP-A  EP FOR WELL AND CREEK RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,202 1 incomplete02/28/2023
EP-A  EP FOR WELL AND CREEK RAD - URANIUM  9 Years 01/01/2026 - 12/31/2034 3,202 1 incomplete02/28/2023
EP-A  EP FOR WELL AND CREEK SOC notes3 Years 01/01/2026 - 12/31/2028 1,011 1 incomplete01/27/2025
EP-A  EP FOR WELL AND CREEK VOLATILE ORGANICS notes3 Years 01/01/2026 - 12/31/2028 1,011 1 incomplete04/02/2025

7  secs
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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months07/01/202212/31/20245
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/202212/31/20232IDSE study. Collect dual sample sets at expected HIGH TTHM and HIGH HAA5 locations
EP-A  EP FOR WELL AND CREEKARSENIC  Quarterly01/01/202112/31/20211sample one time for Arsenic
EP-A  EP FOR WELL AND CREEKARSENIC  Quarterly10/01/202203/31/20251
EP-A  EP FOR WELL AND CREEKARSENIC  Yearly01/01/202209/30/20221
EP-A  EP FOR WELL AND CREEKRAD - GROSS ALPHA  Quarterly07/01/202212/31/20231
EP-A  EP FOR WELL AND CREEKRAD - RADIUM 226/228  Quarterly07/01/202203/31/20231
EP-A  EP FOR WELL AND CREEKRAD - URANIUM  Quarterly07/01/202203/31/20231
EP-A  EP FOR WELL AND CREEKSOC  Yearly01/01/202212/31/20251
EP-A  EP FOR WELL AND CREEKVOLATILE ORGANICS  Quarterly07/01/202203/31/20251
EP-XX  EP FOR HOLE IN THE WALL CREEKNITRATE  Yearly01/01/200207/01/20081

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