OHA Drinking Water Services
OR41
PWS ID: 00901 ---- TROUTDALE, CITY OF

See also: Coliform 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   30incomplete07/27/2023
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesYearly 01/01/2026 - 12/31/2026 279 2 incomplete07/16/2025
  Seasonal sampling period:   07/01   thru   07/31
EP-A  EP FOR WELL #2 (STARK) ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete05/31/2022
EP-A  EP FOR WELL #2 (STARK) IOC notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-A  EP FOR WELL #2 (STARK) NITRATE  Yearly 01/01/2026 - 12/31/2026 279 1 incomplete10/14/2025
EP-A  EP FOR WELL #2 (STARK) NITRITE notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-A  EP FOR WELL #2 (STARK) PFAS notesQuarterly 01/01/2026 - 03/31/2026 4 1 incomplete12/16/2025
  Initial monitoring - 4 quarters only
EP-A  EP FOR WELL #2 (STARK) RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-A  EP FOR WELL #2 (STARK) RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-A  EP FOR WELL #2 (STARK) RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-A  EP FOR WELL #2 (STARK) SOC notes3 Years 01/01/2026 - 12/31/2028 1,010 2 incomplete10/28/2025
EP-A  EP FOR WELL #2 (STARK) VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,010 1 incomplete08/26/2025
EP-C  EP FOR WELL #4 (CITY SHOP) ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete05/31/2022
EP-C  EP FOR WELL #4 (CITY SHOP) IOC notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-C  EP FOR WELL #4 (CITY SHOP) NITRATE  Yearly 01/01/2026 - 12/31/2026 279 1 incomplete10/14/2025
EP-C  EP FOR WELL #4 (CITY SHOP) NITRITE notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-C  EP FOR WELL #4 (CITY SHOP) PFAS notesQuarterly 01/01/2026 - 03/31/2026 4 1 incomplete12/16/2025
  Initial monitoring - 4 quarters only
EP-C  EP FOR WELL #4 (CITY SHOP) RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-C  EP FOR WELL #4 (CITY SHOP) RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-C  EP FOR WELL #4 (CITY SHOP) RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-C  EP FOR WELL #4 (CITY SHOP) SOC notes3 Years 01/01/2026 - 12/31/2028 1,010 2 incomplete10/28/2025
EP-C  EP FOR WELL #4 (CITY SHOP) VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,010 1 incomplete08/26/2025
EP-D  EP FOR WELL #6 (SWEETBRIAR) ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete05/31/2022
EP-D  EP FOR WELL #6 (SWEETBRIAR) IOC notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-D  EP FOR WELL #6 (SWEETBRIAR) NITRATE  Yearly 01/01/2026 - 12/31/2026 279 1 incomplete10/14/2025
EP-D  EP FOR WELL #6 (SWEETBRIAR) NITRITE notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-D  EP FOR WELL #6 (SWEETBRIAR) PFAS notesQuarterly 01/01/2026 - 03/31/2026 4 1 incomplete12/16/2025
  Initial monitoring - 4 quarters only
EP-D  EP FOR WELL #6 (SWEETBRIAR) RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-D  EP FOR WELL #6 (SWEETBRIAR) RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-D  EP FOR WELL #6 (SWEETBRIAR) RAD - URANIUM  9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-D  EP FOR WELL #6 (SWEETBRIAR) SOC notes3 Years 01/01/2026 - 12/31/2028 1,010 2 incomplete10/27/2025
EP-D  EP FOR WELL #6 (SWEETBRIAR) VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,010 1 incomplete08/25/2025
EP-E  EP FOR WELL #7 (SANDEE PALISADES) ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete05/31/2022
EP-E  EP FOR WELL #7 (SANDEE PALISADES) IOC notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-E  EP FOR WELL #7 (SANDEE PALISADES) NITRATE  Yearly 01/01/2026 - 12/31/2026 279 1 incomplete10/14/2025
EP-E  EP FOR WELL #7 (SANDEE PALISADES) NITRITE notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-E  EP FOR WELL #7 (SANDEE PALISADES) PFAS notesQuarterly 01/01/2026 - 03/31/2026 4 1 incomplete12/16/2025
  Initial monitoring - 4 quarters only
EP-E  EP FOR WELL #7 (SANDEE PALISADES) RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-E  EP FOR WELL #7 (SANDEE PALISADES) RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-E  EP FOR WELL #7 (SANDEE PALISADES) RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-E  EP FOR WELL #7 (SANDEE PALISADES) SOC notes3 Years 01/01/2026 - 12/31/2028 1,010 2 incomplete10/28/2025
EP-E  EP FOR WELL #7 (SANDEE PALISADES) VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,010 1 incomplete08/26/2025
EP-F  EP FOR WELL #8 (SANDEE PALISADES) ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete05/31/2022
EP-F  EP FOR WELL #8 (SANDEE PALISADES) IOC notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-F  EP FOR WELL #8 (SANDEE PALISADES) NITRATE  Yearly 01/01/2026 - 12/31/2026 279 1 incomplete10/14/2025
EP-F  EP FOR WELL #8 (SANDEE PALISADES) NITRITE notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-F  EP FOR WELL #8 (SANDEE PALISADES) PFAS notesQuarterly 01/01/2026 - 03/31/2026 4 1 incomplete12/16/2025
  Initial monitoring - 4 quarters only
EP-F  EP FOR WELL #8 (SANDEE PALISADES) RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-F  EP FOR WELL #8 (SANDEE PALISADES) RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-F  EP FOR WELL #8 (SANDEE PALISADES) RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,201 1 incomplete08/13/2024
EP-F  EP FOR WELL #8 (SANDEE PALISADES) SOC notes3 Years 01/01/2026 - 12/31/2028 1,010 2 incomplete10/27/2025
EP-F  EP FOR WELL #8 (SANDEE PALISADES) VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,010 1 incomplete08/25/2025
EP-G  EP FOR WELL #5 ARSENIC notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-G  EP FOR WELL #5 IOC notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-G  EP FOR WELL #5 NITRATE  Yearly 01/01/2026 - 12/31/2026 279 1 incomplete10/14/2025
EP-G  EP FOR WELL #5 NITRITE notes9 Years01/01/2020 - 12/31/2028 1,010 1 done 05/31/2022
EP-G  EP FOR WELL #5 PFAS notesQuarterly 01/01/2026 - 03/31/2026 4 1 incomplete12/16/2025
  Initial monitoring - 4 quarters only
EP-G  EP FOR WELL #5 RAD - GROSS ALPHA  9 Years01/01/2020 - 12/31/2028 1,010 1 done 08/13/2024
EP-G  EP FOR WELL #5 RAD - RADIUM 226/228 9 Years01/01/2020 - 12/31/2028 1,010 1 done 08/13/2024
EP-G  EP FOR WELL #5 RAD - URANIUM  9 Years01/01/2020 - 12/31/2028 1,010 1 done 08/13/2024
EP-G  EP FOR WELL #5 SOC notes3 Years 01/01/2026 - 12/31/2028 1,010 2 incomplete10/27/2025
EP-G  EP FOR WELL #5 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,010 1 incomplete08/25/2025

6  secs
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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200412/31/20041Schedule Reflects 1 RT Sample Per QT Per Aquifer
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/200509/30/20131Sample between June 1 and Sept. 30.
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly10/01/201309/30/20144Sample During Oct, Jan, Apr, and July
EP-A  EP FOR WELL #2 (STARK)ARSENIC  3 Years01/01/200212/31/20071
EP-B  EP FOR WELL #3 (COLUMBIA)ARSENIC  3 Years01/01/200212/31/20071
EP-B  EP FOR WELL #3 (COLUMBIA)ARSENIC  9 Years01/01/200802/11/20221Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #3 (COLUMBIA)IOC  9 Years01/01/200202/11/20221Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #3 (COLUMBIA)NITRATE  Yearly01/01/200211/27/20061
EP-B  EP FOR WELL #3 (COLUMBIA)NITRATE  Yearly01/01/200902/11/20221
EP-B  EP FOR WELL #3 (COLUMBIA)NITRITE  9 Years01/01/200202/11/20221Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #3 (COLUMBIA)RAD - GROSS ALPHA  9 Years01/01/200802/11/20221Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #3 (COLUMBIA)RAD - RADIUM 226/228  9 Years01/01/200802/11/20221Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #3 (COLUMBIA)RAD - URANIUM  9 Years01/01/200802/11/20221Schedule Reflects Monitoring Reduction Granted
EP-B  EP FOR WELL #3 (COLUMBIA)SOC  3 Years01/01/200202/11/202222 Consec. QT Samples
EP-B  EP FOR WELL #3 (COLUMBIA)VOLATILE ORGANICS  3 Years01/01/200202/11/20221
EP-C  EP FOR WELL #4 (CITY SHOP)ARSENIC  3 Years01/01/200212/31/20071
EP-C  EP FOR WELL #4 (CITY SHOP)NITRATE  Yearly01/01/200211/27/20061
EP-D  EP FOR WELL #6 (SWEETBRIAR)ARSENIC  3 Years01/01/200212/31/20071
EP-E  EP FOR WELL #7 (SANDEE PALISADES)ARSENIC  3 Years01/01/200212/31/20071
EP-F  EP FOR WELL #8 (SANDEE PALISADES)ARSENIC  3 Years01/01/200212/31/20071
EP-F  EP FOR WELL #8 (SANDEE PALISADES)IOC  3 Years01/01/200212/31/20041
EP-F  EP FOR WELL #8 (SANDEE PALISADES)NITRITE  3 Years01/01/200212/31/20041
EP-G  EP FOR WELL #5ARSENIC  3 Years01/01/200812/31/20101
EP-G  EP FOR WELL #5IOC  3 Years01/01/200812/31/20101
EP-G  EP FOR WELL #5NITRITE  3 Years01/01/200812/31/20101
EP-G  EP FOR WELL #5RAD - GROSS ALPHA  Quarterly07/01/200903/31/20101
EP-G  EP FOR WELL #5RAD - RADIUM 226/228  Quarterly07/01/200909/30/20101
EP-G  EP FOR WELL #5RAD - URANIUM  Quarterly07/01/200909/30/20091

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