OHA Drinking Water Services
OR41
PWS ID: 00305 ---- FOREST 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-A  COMMON HEADER FOR WTP-A TOC & ALKALINITY notesQuarterly 01/01/2026 - 03/31/2026 60 1 incomplete10/21/2025
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2026 - 12/31/2026   30incomplete06/18/2023
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 60 2 incomplete10/21/2025
EP-A  EP FOR CREEKS - FOREST GROVE ARSENIC notes9 Years01/01/2020 - 12/31/2028 1,066 1 done 05/12/2020
EP-A  EP FOR CREEKS - FOREST GROVE IOC notes9 Years01/01/2020 - 12/31/2028 1,066 1 done 05/12/2020
EP-A  EP FOR CREEKS - FOREST GROVE NITRATE  Yearly 01/01/2026 - 12/31/2026 335 1 incomplete05/13/2025
EP-A  EP FOR CREEKS - FOREST GROVE NITRITE notes9 Years01/01/2020 - 12/31/2028 1,066 1 done 05/12/2020
EP-A  EP FOR CREEKS - FOREST GROVE RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,257 1 incomplete06/20/2017
EP-A  EP FOR CREEKS - FOREST GROVE RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,257 1 incomplete06/20/2017
EP-A  EP FOR CREEKS - FOREST GROVE RAD - URANIUM  9 Years01/01/2023 - 12/31/2031 2,161 1 done 07/18/2023
EP-A  EP FOR CREEKS - FOREST GROVE SOC notes3 Years 01/01/2026 - 12/31/2028 1,066 2 incomplete10/03/2023
EP-A  EP FOR CREEKS - FOREST GROVE VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 335 1 incomplete05/13/2025
WTP-A  TP FOR CREEKS - FOREST GROVETOTAL ORGANIC CARBONnotesQuarterly01/01/2026 - 03/31/2026 60 1 incomplete 10/21/2025

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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  Monthly01/01/200212/31/20081Raw and filtered TOC and alkalinity
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200203/31/200984 per WTP per QT
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly04/01/200903/31/201221 per WTP per QT
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly04/01/201203/31/20134Sample in Jan, April, July & Oct
EP-A  EP FOR CREEKS - FOREST GROVEARSENIC  Yearly01/01/200212/31/20101
EP-A  EP FOR CREEKS - FOREST GROVERAD - URANIUM  6 Years01/01/200812/31/20131
WTP-A  TP FOR CREEKS - FOREST GROVETOTAL ORGANIC CARBON  Monthly01/01/200212/31/20081Post Filtration TOC

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More information for this water system: SDWIS ID 3887
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