OHA Drinking Water Services
OR41
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT

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 notesYearly01/01/2025 - 12/31/2025 173 50 done 06/23/2024
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 07/01/2025 - 09/30/2025 81 8 incomplete03/04/2025
EP-C  EP FOR WELL 1 - GRABHORN ASR ARSENIC notes9 Years01/01/2017 - 12/31/2025 173 1 done 09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR IOC notes9 Years01/01/2017 - 12/31/2025 173 1 done 11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR NITRATE  Yearly 01/01/2025 - 12/31/2025 173 1 incomplete09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR NITRITE notes9 Years01/01/2017 - 12/31/2025 173 1 done 09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - GROSS ALPHA notes9 Years01/01/2020 - 12/31/2028 1,269 1 done 11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - RADIUM 226/228notes9 Years 01/01/2023 - 12/31/2031 2,364 1 incomplete11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - URANIUM notes9 Years 01/01/2023 - 12/31/2031 2,364 1 incomplete11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR SOC notes3 Years01/01/2023 - 12/31/2025 173 2 done 10/16/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR VOLATILE ORGANICS  3 Years 01/01/2023 - 12/31/2025 173 1 incomplete11/04/2020

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More information for this water system: SDWIS ID 4065

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