OHA Drinking Water Services
OR41
PWS ID: 95174 ---- COLUMBIA RIVER DAIRY

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 Years01/01/2027 - 12/31/2027   5 06/27/2024
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notes3 Years01/01/2026 - 12/31/2026   1  07/31/2023
 Seasonal sampling period:  07/01  thru  07/31
EP-A  EP FOR HOLSTEIN WELL ARSENIC notes9 Years01/01/2017 - 12/31/2025 232 1 done 07/28/2021
EP-A  EP FOR HOLSTEIN WELL IOC notes9 Years01/01/2020 - 12/31/2028 1,328 1 done 07/28/2021
EP-A  EP FOR HOLSTEIN WELL NITRATE  Yearly 01/01/2025 - 12/31/2025 232 1 incomplete06/27/2024
EP-A  EP FOR HOLSTEIN WELL NITRITE notes9 Years01/01/2020 - 12/31/2028 1,328 1 done 07/28/2021
EP-A  EP FOR HOLSTEIN WELL SOC  3 Years01/01/2023 - 12/31/2025 232 1 done 03/01/2023
EP-A  EP FOR HOLSTEIN WELL VOLATILE ORGANICS  3 Years 01/01/2023 - 12/31/2025 232 1 incomplete07/28/2021
EP-B  EP FOR JERSEY WELL NITRATE  Yearly 01/01/2025 - 12/31/2025 232 1 incomplete06/27/2024
EP-C  EP FOR SHOP AND 6 MILE WELLS ARSENIC notes9 Years01/01/2017 - 12/31/2025 232 1 done 02/09/2023
EP-C  EP FOR SHOP AND 6 MILE WELLS IOC notes9 Years01/01/2017 - 12/31/2025 232 1 done 02/09/2023
EP-C  EP FOR SHOP AND 6 MILE WELLS NITRATE  Yearly 01/01/2025 - 12/31/2025 232 1 incomplete06/27/2024
EP-C  EP FOR SHOP AND 6 MILE WELLS NITRITE notes9 Years01/01/2017 - 12/31/2025 232 1 done 02/09/2023
EP-C  EP FOR SHOP AND 6 MILE WELLS SOC  3 Years01/01/2023 - 12/31/2025 232 1 done 02/09/2023
EP-C  EP FOR SHOP AND 6 MILE WELLS VOLATILE ORGANICS  3 Years01/01/2023 - 12/31/2025 232 1 done 02/09/2023
EP-D  EP FOR WELL #5 ARSENIC  3 Years01/01/2023 - 12/31/2025 232 1 done 06/05/2023
EP-D  EP FOR WELL #5 IOC  3 Years01/01/2023 - 12/31/2025 232 1 done 06/05/2023
EP-D  EP FOR WELL #5 NITRATE  Yearly 01/01/2025 - 12/31/2025 232 1 incomplete06/27/2024
EP-D  EP FOR WELL #5 NITRITE  3 Years01/01/2023 - 12/31/2025 232 1 done 06/05/2023
EP-D  EP FOR WELL #5 SOC  3 Years 01/01/2023 - 12/31/2025 232 1 incomplete12/15/2022
EP-D  EP FOR WELL #5 VOLATILE ORGANICS  3 Years 01/01/2023 - 12/31/2025 232 1 incomplete07/28/2021
EP-E  EP FOR WELL #7 ARSENIC  3 Years01/01/2023 - 12/31/2025 232 1 done 06/05/2023
EP-E  EP FOR WELL #7 IOC  3 Years01/01/2023 - 12/31/2025 232 1 done 06/05/2023
EP-E  EP FOR WELL #7 NITRATE  Yearly 01/01/2025 - 12/31/2025 232 1 incomplete06/27/2024
EP-E  EP FOR WELL #7 NITRITE  3 Years01/01/2023 - 12/31/2025 232 1 done 06/05/2023
EP-E  EP FOR WELL #7 SOC  3 Years01/01/2023 - 12/31/2025 232 1 done 12/19/2023
EP-E  EP FOR WELL #7 VOLATILE ORGANICS  3 Years01/01/2023 - 12/31/2025 232 1 done 12/19/2023

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