OHA Drinking Water Services
OR41
PWS ID: 00613 ---- PENDLETON, 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
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2026 - 12/31/2026   30incomplete07/18/2023
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 04/01/2026 - 06/30/2026 81 2 incomplete01/12/2026
EP-B  EP FOR WELL #1 (BYERS) NITRATE notesYearly 01/01/2026 - 12/31/2026 265 1 incomplete06/05/2025
EP-B  EP FOR WELL #1 (BYERS) PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete
  Initial monitoring - 4 quarters only
EP-C  EP FOR WELL #2 (ROUNDUP) ARSENIC notes9 Years 01/01/2023 - 12/31/2031 2,091 1 incomplete07/08/2020
EP-C  EP FOR WELL #2 (ROUNDUP) IOC notes9 Years01/01/2020 - 12/31/2028 996 1 done 07/08/2020
EP-C  EP FOR WELL #2 (ROUNDUP) NITRATE  Yearly 01/01/2026 - 12/31/2026 265 1 incomplete06/05/2025
EP-C  EP FOR WELL #2 (ROUNDUP) NITRITE notes9 Years01/01/2020 - 12/31/2028 996 1 done 07/08/2020
EP-C  EP FOR WELL #2 (ROUNDUP) PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete
  Initial monitoring - 4 quarters only
EP-C  EP FOR WELL #2 (ROUNDUP) RAD - GROSS ALPHA notes9 Years 01/01/2023 - 12/31/2031 2,091 1 incomplete10/26/2020
EP-C  EP FOR WELL #2 (ROUNDUP) RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,187 1 incomplete10/26/2020
EP-C  EP FOR WELL #2 (ROUNDUP) RAD - URANIUM  6 Years 01/01/2026 - 12/31/2031 2,091 1 incomplete08/31/2020
EP-C  EP FOR WELL #2 (ROUNDUP) SOC notes3 Years 01/01/2026 - 12/31/2028 996 2 incomplete10/21/2025
EP-C  EP FOR WELL #2 (ROUNDUP) VOLATILE ORGANICS notes3 Years 01/01/2026 - 12/31/2028 996 1 incomplete08/29/2023
EP-D  EP FOR WELL #3 (SW 21 ST) ARSENIC  9 Years 01/01/2026 - 12/31/2034 3,187 1 incomplete07/08/2020
EP-D  EP FOR WELL #3 (SW 21 ST) IOC notes9 Years01/01/2020 - 12/31/2028 996 1 done 07/08/2020
EP-D  EP FOR WELL #3 (SW 21 ST) NITRATE  Yearly 01/01/2026 - 12/31/2026 265 1 incomplete11/12/2025
EP-D  EP FOR WELL #3 (SW 21 ST) NITRITE notes9 Years01/01/2020 - 12/31/2028 996 1 done 07/08/2020
EP-D  EP FOR WELL #3 (SW 21 ST) PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete
  Initial monitoring - 4 quarters only
EP-D  EP FOR WELL #3 (SW 21 ST) RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,187 1 incomplete10/26/2020
EP-D  EP FOR WELL #3 (SW 21 ST) RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,187 1 incomplete10/26/2020
EP-D  EP FOR WELL #3 (SW 21 ST) RAD - URANIUM  6 Years 01/01/2026 - 12/31/2031 2,091 1 incomplete08/31/2020
EP-D  EP FOR WELL #3 (SW 21 ST) SOC notes3 Years 01/01/2026 - 12/31/2028 996 2 incomplete11/12/2025
EP-D  EP FOR WELL #3 (SW 21 ST) VOLATILE ORGANICS notes3 Years 01/01/2026 - 12/31/2028 996 1 incomplete08/29/2023
EP-E  EP FOR WELL #4 (HOSPITAL) NITRATE notesYearly 01/01/2026 - 12/31/2026 265 1 incomplete06/05/2025
EP-E  EP FOR WELL #4 (HOSPITAL) PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete04/24/2023
  Initial monitoring - 4 quarters only
EP-F  EP FOR WELL #5 (STILLMAN) NITRATE notesYearly 01/01/2026 - 12/31/2026 265 1 incomplete07/28/2025
EP-F  EP FOR WELL #5 (STILLMAN) PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete
  Initial monitoring - 4 quarters only
EP-G  EP FOR WELL #8 (PRISON) NITRATE notesYearly 01/01/2026 - 12/31/2026 265 1 incomplete06/05/2025
EP-G  EP FOR WELL #8 (PRISON) PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete
  Initial monitoring - 4 quarters only
EP-H  EP FOR WELL #14 NITRATE notesYearly 01/01/2026 - 12/31/2026 265 1 incomplete06/05/2025
EP-H  EP FOR WELL #14 PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete
  Initial monitoring - 4 quarters only
EP-I  EP FOR WELL 11B ARSENIC  3 Years 01/01/2026 - 12/31/2028 996 1 incomplete
EP-I  EP FOR WELL 11B IOC  3 Years 01/01/2026 - 12/31/2028 996 1 incomplete
EP-I  EP FOR WELL 11B NITRATE  Yearly 01/01/2026 - 12/31/2026 265 1 incomplete
EP-I  EP FOR WELL 11B NITRITE  3 Years 01/01/2026 - 12/31/2028 996 1 incomplete
EP-I  EP FOR WELL 11B PFAS notesQuarterly 04/01/2026 - 06/30/2026 81 1 incomplete
  Initial monitoring - 4 quarters only
EP-I  EP FOR WELL 11B RAD - GROSS ALPHA  9 Years 01/01/2026 - 12/31/2034 3,187 1 incomplete
EP-I  EP FOR WELL 11B RAD - RADIUM 226/228 6 Years 01/01/2026 - 12/31/2031 2,091 1 incomplete
EP-I  EP FOR WELL 11B RAD - URANIUM  9 Years 01/01/2026 - 12/31/2034 3,187 1 incomplete
EP-I  EP FOR WELL 11B SOC notes3 Years 01/01/2026 - 12/31/2028 996 2 incomplete
EP-I  EP FOR WELL 11B VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 996 1 incomplete

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