OHA Drinking Water Services
OR41
PWS ID: 00372 ---- HERMISTON, 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-F  COMMON HEADER FOR WTP-F TOC & ALKALINITY notesQuarterly 04/01/2026 - 06/30/2026 54 1 incomplete01/20/2026
DIST-A  DISTRIBUTION SYSTEM ASBESTOS, DIST notes9 Years01/01/2020 - 12/31/2028 969 1 done 07/09/2020
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2026 - 12/31/2026   30incomplete07/14/2023
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP  Quarterly 04/01/2026 - 06/30/2026 54 4 incomplete03/04/2026
EP-A  EP FOR WELL #2 NITRATE  Yearly01/01/2026 - 12/31/2026 238 1 done 01/07/2026
EP-A  EP FOR WELL #2 PFAS notesQuarterly 04/01/2026 - 06/30/2026 54 1 incomplete
  Initial monitoring - 4 quarters only
EP-B  EP FOR WELL #4 ARSENIC  9 Years01/01/2023 - 12/31/2031 2,064 1 done 06/10/2024
EP-B  EP FOR WELL #4 IOC notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-B  EP FOR WELL #4 NITRATE  Quarterly04/01/2026 - 06/30/2026 54 1 done 04/02/2026
EP-B  EP FOR WELL #4 NITRITE notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-B  EP FOR WELL #4 PFAS notesQuarterly 04/01/2026 - 06/30/2026 54 1 incomplete
  Initial monitoring - 4 quarters only
EP-B  EP FOR WELL #4 RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,160 1 incomplete07/18/2018
EP-B  EP FOR WELL #4 RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,160 1 incomplete07/18/2018
EP-B  EP FOR WELL #4 RAD - URANIUM  9 Years 01/01/2026 - 12/31/2034 3,160 1 incomplete07/18/2018
EP-B  EP FOR WELL #4 SOC notes3 Years 01/01/2026 - 12/31/2028 969 2 incomplete04/18/2023
EP-B  EP FOR WELL #4 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 969 1 incomplete11/20/2024
EP-C  EP FOR WELL #5 ARSENIC  9 Years01/01/2023 - 12/31/2031 2,064 1 done 06/10/2024
EP-C  EP FOR WELL #5 IOC notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-C  EP FOR WELL #5 NITRATE  Yearly01/01/2026 - 12/31/2026 238 1 done 01/07/2026
EP-C  EP FOR WELL #5 NITRITE notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-C  EP FOR WELL #5 PFAS notesQuarterly 04/01/2026 - 06/30/2026 54 1 incomplete
  Initial monitoring - 4 quarters only
EP-C  EP FOR WELL #5 RAD - GROSS ALPHA  6 Years01/01/2023 - 12/31/2028 969 1 done 07/09/2024
EP-C  EP FOR WELL #5 RAD - RADIUM 226/228 9 Years01/01/2020 - 12/31/2028 969 1 done 07/13/2022
EP-C  EP FOR WELL #5 RAD - URANIUM  6 Years01/01/2023 - 12/31/2028 969 1 done 07/09/2024
EP-C  EP FOR WELL #5 SOC notes3 Years 01/01/2026 - 12/31/2028 969 2 incomplete04/18/2023
EP-C  EP FOR WELL #5 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 969 1 incomplete11/20/2024
EP-D  EP FOR WELL #6 ARSENIC  9 Years01/01/2023 - 12/31/2031 2,064 1 done 06/10/2024
EP-D  EP FOR WELL #6 IOC notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-D  EP FOR WELL #6 NITRATE  Yearly01/01/2026 - 12/31/2026 238 1 done 01/07/2026
EP-D  EP FOR WELL #6 NITRITE notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-D  EP FOR WELL #6 PFAS notesQuarterly 04/01/2026 - 06/30/2026 54 1 incomplete
  Initial monitoring - 4 quarters only
EP-D  EP FOR WELL #6 RAD - GROSS ALPHA  9 Years01/01/2023 - 12/31/2031 2,064 1 done 07/10/2024
EP-D  EP FOR WELL #6 RAD - RADIUM 226/228 9 Years01/01/2020 - 12/31/2028 969 1 done 07/14/2020
EP-D  EP FOR WELL #6 RAD - URANIUM  9 Years01/01/2023 - 12/31/2031 2,064 1 done 07/10/2024
EP-D  EP FOR WELL #6 SOC notes3 Years 01/01/2026 - 12/31/2028 969 2 incomplete04/18/2023
EP-D  EP FOR WELL #6 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 969 1 incomplete11/20/2024
EP-F  EP FOR COLUMBIA RIVER ARSENIC  9 Years01/01/2023 - 12/31/2031 2,064 1 done 06/17/2025
EP-F  EP FOR COLUMBIA RIVER IOC notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-F  EP FOR COLUMBIA RIVER NITRATE  Yearly01/01/2026 - 12/31/2026 238 1 done 01/07/2026
EP-F  EP FOR COLUMBIA RIVER NITRITE notes9 Years01/01/2020 - 12/31/2028 969 1 done 06/02/2020
EP-F  EP FOR COLUMBIA RIVER PFAS notesQuarterly 04/01/2026 - 06/30/2026 54 1 incomplete
  Initial monitoring - 4 quarters only
EP-F  EP FOR COLUMBIA RIVER RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,160 1 incomplete07/18/2018
EP-F  EP FOR COLUMBIA RIVER RAD - RADIUM 226/228 9 Years01/01/2020 - 12/31/2028 969 1 done 07/09/2020
EP-F  EP FOR COLUMBIA RIVER RAD - URANIUM  9 Years01/01/2023 - 12/31/2031 2,064 1 done 07/10/2024
EP-F  EP FOR COLUMBIA RIVER SOC notes3 Years 01/01/2026 - 12/31/2028 969 2 incomplete04/18/2023
EP-F  EP FOR COLUMBIA RIVER VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 238 1 incomplete11/18/2025
WTP-F  TP FOR COLUMBIA RIVERTOTAL ORGANIC CARBONnotesQuarterly04/01/2026 - 06/30/2026 54 1 incomplete 01/20/2026

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