OHA Drinking Water Services
OR41
PWS ID: 00548 ---- CLARKS BRANCH WATER ASSOC

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 notesQuarterly 01/01/2026 - 03/31/2026 26 1 incomplete11/07/2025
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER  6 Months 01/01/2026 - 06/30/2026 117 10 incomplete07/24/2025
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 26 1 incomplete11/07/2025
EP-A  EP FOR SOUTH UMPQUA RIVER ARSENIC  9 Years01/01/2020 - 12/31/2028 1,032 1 done 08/05/2025
EP-A  EP FOR SOUTH UMPQUA RIVER IOC notes9 Years01/01/2020 - 12/31/2028 1,032 1 done 08/05/2025
EP-A  EP FOR SOUTH UMPQUA RIVER NITRATE  Yearly 01/01/2026 - 12/31/2026 301 1 incomplete08/05/2025
EP-A  EP FOR SOUTH UMPQUA RIVER NITRITE notes9 Years01/01/2020 - 12/31/2028 1,032 1 done 08/05/2025
EP-A  EP FOR SOUTH UMPQUA RIVER PFAS notesQuarterly 01/01/2026 - 03/31/2026 26 1 incomplete02/18/2022
  Initial monitoring - 4 quarters only
EP-A  EP FOR SOUTH UMPQUA RIVER RAD - GROSS ALPHA  6 Years 01/01/2026 - 12/31/2031 2,127 1 incomplete10/04/2023
EP-A  EP FOR SOUTH UMPQUA RIVER RAD - RADIUM 226/228 9 Years01/01/2020 - 12/31/2028 1,032 1 done 08/05/2025
EP-A  EP FOR SOUTH UMPQUA RIVER RAD - URANIUM  9 Years01/01/2020 - 12/31/2028 1,032 1 done 08/05/2025
EP-A  EP FOR SOUTH UMPQUA RIVER SOC  3 Years 01/01/2026 - 12/31/2028 1,032 1 incomplete08/03/2023
EP-A  EP FOR SOUTH UMPQUA RIVER VOLATILE ORGANICS notesYearly 01/01/2026 - 12/31/2026 301 1 incomplete07/10/2025
  Seasonal sampling period:   07/01   thru   09/30
SRC-AA  SOUTH UMPQUA RIVER CYANOTOXINS  2 Weeks-- -- -- -- --10/21/2025
  Seasonal sampling period:   05/01   thru   10/31

5  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/200409/30/20141Sample between June 1 and Sept. 30.
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200212/31/20255Sample Between June 1st and Sept 30th
EP-A  EP FOR SOUTH UMPQUA RIVERARSENIC  Yearly01/01/200212/31/20081
EP-A  EP FOR SOUTH UMPQUA RIVERRAD - GROSS ALPHA  9 Years01/01/201112/31/20191
EP-A  EP FOR SOUTH UMPQUA RIVERRAD - GROSS ALPHA  Quarterly01/01/201006/30/20101
EP-A  EP FOR SOUTH UMPQUA RIVERRAD - RADIUM 226/228  Quarterly01/01/201006/30/20101
EP-A  EP FOR SOUTH UMPQUA RIVERRAD - URANIUM  Quarterly01/01/201006/30/20101

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