OHA Drinking Water Services
OR41
PWS ID: 00236 ---- COTTAGE GROVE, CITY OF

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-B  COMMON HEADER FOR WTP-BTOTAL ORGANIC CARBON Quarterly01/01/2026 - 03/31/2026 22 1 incomplete 07/14/2025
DIST-A  DISTRIBUTION SYSTEM ASBESTOS, DIST notes9 Years01/01/2020 - 12/31/2028 1,028 1 done 04/13/2020
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2027 - 12/31/2027   30 08/28/2024
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 22 2 incomplete11/17/2025
EP-B  EP FOR WTP ROW RIVER ARSENIC  9 Years01/01/2020 - 12/31/2028 1,028 1 done 04/13/2020
EP-B  EP FOR WTP ROW RIVER IOC notes9 Years01/01/2020 - 12/31/2028 1,028 1 done 04/13/2020
EP-B  EP FOR WTP ROW RIVER NITRATE  Yearly 01/01/2026 - 12/31/2026 297 1 incomplete04/28/2025
EP-B  EP FOR WTP ROW RIVER NITRITE notes9 Years01/01/2020 - 12/31/2028 1,028 1 done 04/13/2020
EP-B  EP FOR WTP ROW RIVER PFAS notesQuarterly 01/01/2026 - 03/31/2026 22 1 incomplete
  Initial monitoring - 4 quarters only
EP-B  EP FOR WTP ROW RIVER RAD - GROSS ALPHA  9 Years 01/01/2020 - 12/31/2028 1,028 1 incomplete05/14/2018
EP-B  EP FOR WTP ROW RIVER RAD - RADIUM 226/228 9 Years 01/01/2026 - 12/31/2034 3,219 1 incomplete03/24/2025
EP-B  EP FOR WTP ROW RIVER RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,123 1 incomplete06/08/2015
EP-B  EP FOR WTP ROW RIVER SOC notes3 Years 01/01/2026 - 12/31/2028 1,028 2 incomplete07/17/2023
EP-B  EP FOR WTP ROW RIVER VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 297 1 incomplete04/28/2025
SRC-BA  ROW RIVER CYANOTOXINS  2 Weeks-- -- -- -- --10/20/2025
  Seasonal sampling period:   05/01   thru   10/31

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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
CH-A  COMMON HEADER FOR WTP-ATOTAL ORGANIC CARBON  Monthly01/01/200412/31/20051Raw Water TOC Only Required for Reduction in DBP Monitoring
CH-A  COMMON HEADER FOR WTP-ATOTAL ORGANIC CARBON  Quarterly01/01/200610/28/20101
CH-B  COMMON HEADER FOR WTP-BTOC & ALKALINITY  Monthly01/01/200412/31/20051Raw and filtered TOC and alkalinity
CH-B  COMMON HEADER FOR WTP-BTOC & ALKALINITY  Quarterly01/01/200612/31/20091
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200412/31/20052Schedule Reflects 1 RT Sample Per QT Per WTP
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/200612/31/20102Sample between June 1 and Sept. 30.
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/201109/30/20131Sample between June 1 and Sept 30.
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200212/31/201820Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly10/01/201309/30/20142Sample in Nov, Feb, May, Aug.
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/201512/31/20182Sample in November
EP-A  EP FOR WTP LAYNG CREEKARSENIC  Yearly01/01/200212/31/20091
EP-A  EP FOR WTP LAYNG CREEKIOC  9 Years01/01/200210/28/20101Schedule Reflects Monitoring Reduction Granted
EP-A  EP FOR WTP LAYNG CREEKNITRATE  Yearly01/01/200210/28/20101
EP-A  EP FOR WTP LAYNG CREEKNITRITE  9 Years01/01/200210/28/20101Schedule Reflects Monitoring Reduction Granted
EP-A  EP FOR WTP LAYNG CREEKRAD - GROSS ALPHA  9 Years01/01/200810/28/20101
EP-A  EP FOR WTP LAYNG CREEKRAD - RADIUM 226/228  9 Years01/01/200810/28/20101
EP-A  EP FOR WTP LAYNG CREEKRAD - URANIUM  6 Years01/01/200810/28/20101
EP-A  EP FOR WTP LAYNG CREEKSOC  3 Years01/01/200210/28/201022 Consec. QT Samples
EP-A  EP FOR WTP LAYNG CREEKVOLATILE ORGANICS  Yearly01/01/200210/28/20101
EP-B  EP FOR WTP ROW RIVERARSENIC  Yearly01/01/200212/31/20091
EP-B  EP FOR WTP ROW RIVERRAD - GROSS ALPHA  3 Years01/01/201712/31/20191
EP-B  EP FOR WTP ROW RIVERRAD - GROSS ALPHA  9 Years01/01/200812/31/20161
EP-B  EP FOR WTP ROW RIVERRAD - URANIUM  6 Years01/01/200812/31/20131
WTP-B  TP FOR ROW RIVERTOTAL ORGANIC CARBON  Monthly01/01/200412/31/20051Post Filtration TOC
WTP-B  TP FOR ROW RIVERTOTAL ORGANIC CARBON  Quarterly01/01/200601/20/20101

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