OHA Drinking Water Services
OR41
PWS ID: 00689 ---- CITY OF RAINIER

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
CH-A  COMMON HEADER FOR WTP-A TOC & ALKALINITY  Quarterly 01/01/2026 - 03/31/2026 72 1 incomplete10/21/2025
DIST-A  Distribution System ASBESTOS, DIST notes9 Years01/01/2020 - 12/31/2028 1,078 1 done 11/16/2022
DIST-A  Distribution System LEAD & COPPER notes3 Years01/01/2028 - 12/31/2028   10 07/31/2025
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  Distribution System STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 72 1 incomplete10/21/2025
EP-A  EP FOR COLUMBIA RIVER ARSENIC notes9 Years01/01/2020 - 12/31/2028 1,078 1 done 11/16/2022
EP-A  EP FOR COLUMBIA RIVER IOC notes9 Years01/01/2020 - 12/31/2028 1,078 1 done 11/16/2022
EP-A  EP FOR COLUMBIA RIVER NITRATE  Yearly 01/01/2026 - 12/31/2026 347 1 incomplete07/24/2025
EP-A  EP FOR COLUMBIA RIVER NITRITE notes9 Years01/01/2020 - 12/31/2028 1,078 1 done 11/16/2022
EP-A  EP FOR COLUMBIA RIVER RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,269 1 incomplete11/16/2022
EP-A  EP FOR COLUMBIA RIVER RAD - RADIUM 226/228notes9 Years 01/01/2023 - 12/31/2031 2,173 1 incomplete11/16/2022
EP-A  EP FOR COLUMBIA RIVER RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,173 1 incomplete11/16/2022
EP-A  EP FOR COLUMBIA RIVER SOC  3 Years 01/01/2026 - 12/31/2028 1,078 1 incomplete10/12/2021
EP-A  EP FOR COLUMBIA RIVER VOLATILE ORGANICS notesYearly 01/01/2026 - 12/31/2026 347 1 incomplete01/24/2025
SRC-AB  COLUMBIA RIVER CYANOTOXINS  2 Weeks-- -- -- -- --10/24/2025
 Seasonal sampling period:  05/01  thru  10/31
WTP-A  TP FOR COLUMBIA RIVERTOTAL ORGANIC CARBON Quarterly01/01/2026 - 03/31/2026 72 1 incomplete 10/21/2025

5  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
CH-A  COMMON HEADER FOR WTP-ATOC & ALKALINITY  Monthly01/01/200412/31/20051Raw and filtered TOC and alkalinity
DIST-A  Distribution SystemHAA5 & TTHM  Quarterly01/01/200412/31/20051Schedule Reflects 1 RT Sample Per QT Per WTP
DIST-A  Distribution SystemHAA5 & TTHM  Yearly01/01/200609/30/20131Sample between June 1 and Sept. 30.
EP-A  EP FOR COLUMBIA RIVERARSENIC  Yearly01/01/200212/31/20091
EP-A  EP FOR COLUMBIA RIVERDIQUAT   Quarterly01/01/201412/31/20141
EP-A  EP FOR COLUMBIA RIVERDIQUAT   Yearly01/01/201512/31/20181Sample in 4th quarter
EP-A  EP FOR COLUMBIA RIVERENDOTHALL   Quarterly04/01/201912/31/20191
EP-A  EP FOR COLUMBIA RIVERENDOTHALL   Yearly01/01/202112/31/20231Sample in 4th quarter.
EP-A  EP FOR COLUMBIA RIVERRAD - RADIUM 226/228  6 Years01/01/200812/31/20131
EP-A  EP FOR COLUMBIA RIVERRAD - URANIUM  6 Years01/01/200812/31/20131
EP-A  EP FOR COLUMBIA RIVERSOC  3 Years01/01/200212/31/20191
EP-A  EP FOR COLUMBIA RIVERSOC  3 Years01/01/202012/31/20251
EP-A  EP FOR COLUMBIA RIVERVOLATILE ORGANICS  Yearly01/01/200212/31/20131
EP-A  EP FOR COLUMBIA RIVERXYLENES, TOTAL   Quarterly07/01/201212/31/20131
SRC-AB  COLUMBIA RIVERCYANOTOXINS  WK 07/30/202309/15/20231
WTP-A  TP FOR COLUMBIA RIVERTOTAL ORGANIC CARBON  Monthly01/01/200412/31/20051Post Filtration TOC

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