OHA Drinking Water Services
OR41
PWS ID: 01542 ---- LAKE OSWEGO - TIGARD WATER SUPPLY

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
CH-A  CH FOR CLACKAMAS RIVER TOC & ALKALINITY  Quarterly04/01/2024 - 06/30/2024 29 1 incomplete04/06/2022
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesYearly01/01/2024 - 12/31/2024 213 1 incomplete07/28/2021
 Seasonal sampling period:  07/01  thru  07/31
EP-A  EP FOR CLACKAMAS RIVERBROMATE  Monthly06/01/2024 - 06/30/2024 29 1 incomplete 05/04/2022
EP-A  EP FOR CLACKAMAS RIVER ARSENIC  9 Years01/01/2017 - 12/31/2025 578 1 incomplete
EP-A  EP FOR CLACKAMAS RIVER IOC  9 Years01/01/2020 - 12/31/2028 1,674 1 incomplete
EP-A  EP FOR CLACKAMAS RIVER NITRATE  Yearly01/01/2024 - 12/31/2024 213 1 incomplete01/19/2022
EP-A  EP FOR CLACKAMAS RIVER NITRITE  9 Years01/01/2020 - 12/31/2028 1,674 1 done 01/19/2022
EP-A  EP FOR CLACKAMAS RIVER RAD - GROSS ALPHA  9 Years01/01/2017 - 12/31/2025 578 1 incomplete
EP-A  EP FOR CLACKAMAS RIVER RAD - RADIUM 226/228 9 Years01/01/2017 - 12/31/2025 578 1 incomplete
EP-A  EP FOR CLACKAMAS RIVER RAD - URANIUM  9 Years01/01/2017 - 12/31/2025 578 1 incomplete
EP-A  EP FOR CLACKAMAS RIVER SOC  3 Years01/01/2023 - 12/31/2025 578 2 incomplete01/19/2022
EP-A  EP FOR CLACKAMAS RIVER VOLATILE ORGANICS  Yearly01/01/2024 - 12/31/2024 213 1 incomplete01/19/2022
SRC-AA  CLACKAMAS RIVER CYANOTOXINS  2 Weeks05/19/2024 - 06/01/2024 0 1 incomplete06/13/2022
 Seasonal sampling period:  05/01  thru  10/31
WTP-A  TP FOR CLACKAMAS RIVERTOTAL ORGANIC CARBON Quarterly04/01/2024 - 06/30/2024 29 1 incomplete 04/06/2022

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More information for this water system: SDWIS ID 5510
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