OHA Drinking Water Services
OR41
PWS ID: 00823 ---- SILVERTON, 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 73 1 incomplete07/08/2025
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2026 - 12/31/2026   30incomplete06/21/2023
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 73 2 incomplete07/08/2025
EP-A  EP FOR ABIQUA AND SILVER CREEKS ARSENIC notes9 Years 01/01/2026 - 12/31/2034 3,270 2 incomplete11/17/2020
EP-A  EP FOR ABIQUA AND SILVER CREEKS IOC notes9 Years01/01/2020 - 12/31/2028 1,079 2 done 11/17/2020
EP-A  EP FOR ABIQUA AND SILVER CREEKS NITRATE notesYearly 01/01/2026 - 12/31/2026 348 2 incomplete02/24/2025
EP-A  EP FOR ABIQUA AND SILVER CREEKS NITRITE notes9 Years01/01/2020 - 12/31/2028 1,079 2 done 11/17/2020
EP-A  EP FOR ABIQUA AND SILVER CREEKS RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,270 2 incomplete11/18/2020
EP-A  EP FOR ABIQUA AND SILVER CREEKS RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,270 2 incomplete11/18/2020
EP-A  EP FOR ABIQUA AND SILVER CREEKS RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,270 2 incomplete11/18/2020
EP-A  EP FOR ABIQUA AND SILVER CREEKS SOC notes3 Years 01/01/2026 - 12/31/2028 1,079 2 incomplete05/13/2024
EP-A  EP FOR ABIQUA AND SILVER CREEKS VOLATILE ORGANICS notesYearly 01/01/2026 - 12/31/2026 348 2 incomplete08/11/2025
WTP-A  TP FOR CREEKSTOTAL ORGANIC CARBONnotesQuarterly01/01/2026 - 03/31/2026 73 1 incomplete 07/08/2025

6  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  Monthly01/01/200406/30/20081Raw and filtered TOC and alkalinity
DIST-A  DISTRIBUTION SYSTEMASBESTOS, DIST  9 Years01/01/200212/31/20161Schedule Reflects Monitoring Reduction Granted
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200406/30/20081Schedule Reflects 1 RT Sample Per QT Per WTP
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly07/01/200809/30/20131Sample between June 1 and Sept. 30.
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  3 Years01/01/200212/31/201920Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly10/01/201312/31/20142Sample in Oct, Jan, April, and July
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/201512/31/20191Sample in October
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/201612/31/20191Sample in April
EP-A  EP FOR ABIQUA AND SILVER CREEKSARSENIC  Yearly01/01/200212/31/20071
EP-A  EP FOR ABIQUA AND SILVER CREEKSNITRATE  Yearly01/01/200212/31/20131
EP-A  EP FOR ABIQUA AND SILVER CREEKSVOLATILE ORGANICS  Yearly01/01/200212/31/20131
EP-A  EP FOR ABIQUA AND SILVER CREEKSVOLATILE ORGANICS  Yearly01/01/201412/31/20222Take 1 Sample when each source is in use.
EP-A  EP FOR ABIQUA AND SILVER CREEKSVOLATILE ORGANICS  Yearly01/01/202312/31/20231
SRC-AB  SILVER CREEKCYANOTOXINS  2 Weeks07/15/201801/24/20191
WTP-A  TP FOR CREEKSTOTAL ORGANIC CARBON  Monthly01/01/200406/30/20081Post Filtration TOC

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More information for this water system: SDWIS ID 3910
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