OHA Drinking Water Services
OR41
PWS ID: 00954 ---- WILSONVILLE, 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-H  COMMON HEADER FOR WTP-H TOC & ALKALINITY notesQuarterly 01/01/2026 - 03/31/2026 56 1 incomplete10/22/2025
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2027 - 12/31/2027   30 07/30/2024
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 56 4 incomplete08/20/2025
EP-H  EP FOR WILLAMETTE RIVERBROMATE notesQuarterly01/01/2026 - 03/31/2026 56 1 incomplete 10/01/2025
EP-H  EP FOR WILLAMETTE RIVER ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,253 1 incomplete01/11/2023
EP-H  EP FOR WILLAMETTE RIVER IOC notes9 Years01/01/2020 - 12/31/2028 1,062 1 done 01/11/2023
EP-H  EP FOR WILLAMETTE RIVER NITRATE  Yearly 01/01/2026 - 12/31/2026 331 1 incomplete01/27/2025
EP-H  EP FOR WILLAMETTE RIVER NITRITE notes9 Years01/01/2020 - 12/31/2028 1,062 1 done 01/27/2025
EP-H  EP FOR WILLAMETTE RIVER RAD - GROSS ALPHA  9 Years 01/01/2023 - 12/31/2031 2,157 1 incomplete04/25/2022
EP-H  EP FOR WILLAMETTE RIVER RAD - RADIUM 226/228 9 Years 01/01/2023 - 12/31/2031 2,157 1 incomplete04/25/2022
EP-H  EP FOR WILLAMETTE RIVER RAD - URANIUM  9 Years 01/01/2023 - 12/31/2031 2,157 1 incomplete04/25/2022
EP-H  EP FOR WILLAMETTE RIVER SOC notes3 Years 01/01/2026 - 12/31/2028 1,062 1 incomplete01/11/2023
EP-H  EP FOR WILLAMETTE RIVER VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 331 1 incomplete01/27/2025
SRC-HA  WILLAMETTE RIVER CYANOTOXINS  2 Weeks-- -- -- -- --10/20/2025
 Seasonal sampling period:  05/01  thru  10/31
WTP-H  TP FOR WILLAMETTE RIVERTOTAL ORGANIC CARBON Quarterly01/01/2026 - 03/31/2026 56 1 incomplete 10/22/2025

6  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
CH-H  COMMON HEADER FOR WTP-HTOC & ALKALINITY  Monthly01/01/200203/31/20081Raw and filtered TOC and alkalinity
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200209/30/20131Schedule Reflects Monitoring Reduction Granted
EP-A  EP FOR ELLIGSEN (STAFFORD) WELLNITRATE  Yearly01/01/200205/21/20021
EP-A  EP FOR ELLIGSEN (STAFFORD) WELLVOLATILE ORGANICS  3 Years01/01/200205/21/20021
EP-B  EP FOR WEIDMAN WELLNITRATE  Yearly01/01/200205/21/20021
EP-B  EP FOR WEIDMAN WELLVOLATILE ORGANICS  3 Years01/01/200205/21/20021
EP-C  EP FOR CHARBONNEAU WELLSNITRATE  Yearly01/01/200205/21/20021
EP-C  EP FOR CHARBONNEAU WELLSVOLATILE ORGANICS  3 Years01/01/200205/21/20021
EP-D  EP FOR GESELLSHAFT WELLNITRATE  Yearly01/01/200205/21/20021
EP-D  EP FOR GESELLSHAFT WELLVOLATILE ORGANICS  3 Years01/01/200205/21/20021
EP-E  EP FOR NIKE WELLNITRATE  Yearly01/01/200205/21/20021
EP-E  EP FOR NIKE WELLVOLATILE ORGANICS  3 Years01/01/200205/21/20021
EP-F  EP FOR CANYON CREEKNITRATE  Yearly01/01/200205/21/20021
EP-F  EP FOR CANYON CREEKVOLATILE ORGANICS  3 Years01/01/200205/21/20021
EP-G  EP FOR BOECKMAN WELLNITRATE  Yearly01/01/200205/21/20021
EP-G  EP FOR BOECKMAN WELLVOLATILE ORGANICS  3 Years01/01/200205/21/20021
EP-H  EP FOR WILLAMETTE RIVERARSENIC  Yearly01/01/200201/01/20071
EP-H  EP FOR WILLAMETTE RIVERBROMATE   Monthly01/01/200206/30/20111Sample at the Entry Point
EP-H  EP FOR WILLAMETTE RIVERCYANOTOXINS  WK 07/14/202408/16/20241
EP-H  EP FOR WILLAMETTE RIVERDI(2-ETHYLHEXYL) PHTHALATE   Quarterly07/01/201509/30/20161
EP-H  EP FOR WILLAMETTE RIVERRAD - GROSS ALPHA  6 Years01/01/200812/31/20131
EP-H  EP FOR WILLAMETTE RIVERRAD - RADIUM 226/228  6 Years01/01/200812/31/20131
EP-H  EP FOR WILLAMETTE RIVERRAD - URANIUM  6 Years01/01/200812/31/20131
EP-H  EP FOR WILLAMETTE RIVERSOC  3 Years01/01/200212/31/201622 Consec. QT Samples
SRC-HA  WILLAMETTE RIVERCYANOTOXINS  2 Weeks01/27/201907/08/20241
SRC-HA  WILLAMETTE RIVERCYANOTOXINS  2 Weeks07/15/201801/24/20191
SRC-HA  WILLAMETTE RIVERCYANOTOXINS  WK 07/14/202408/16/20241

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