OHA Drinking Water Services
OR41
PWS ID: 00878 ---- TIGARD, CITY OF

See also: Coliform 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
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2026 - 12/31/2026   30incomplete06/14/2023
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 01/01/2026 - 03/31/2026 89 4 incomplete08/05/2025
EP-C  EP FOR ASR WELL 1 ARSENIC notes9 Years01/01/2023 - 12/31/2031 2,190 1 done 07/15/2024
EP-C  EP FOR ASR WELL 1 IOC notes9 Years01/01/2020 - 12/31/2028 1,095 1 done 05/06/2020
EP-C  EP FOR ASR WELL 1 NITRATE  Yearly 01/01/2026 - 12/31/2026 364 1 incomplete07/30/2025
EP-C  EP FOR ASR WELL 1 NITRITE notes9 Years01/01/2020 - 12/31/2028 1,095 1 done 07/15/2024
EP-C  EP FOR ASR WELL 1 RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,286 1 incomplete05/06/2020
EP-C  EP FOR ASR WELL 1 RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,286 1 incomplete05/06/2020
EP-C  EP FOR ASR WELL 1 RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,286 1 incomplete05/06/2020
EP-C  EP FOR ASR WELL 1 SOC notes3 Years 01/01/2026 - 12/31/2028 1,095 2 incomplete10/01/2024
EP-C  EP FOR ASR WELL 1 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,095 1 incomplete07/15/2024
EP-D  EP FOR WELL #2 ARSENIC notes9 Years01/01/2023 - 12/31/2031 2,190 1 done 10/01/2024
EP-D  EP FOR WELL #2 IOC notes9 Years01/01/2020 - 12/31/2028 1,095 1 done 05/13/2020
EP-D  EP FOR WELL #2 NITRATE  Yearly 01/01/2026 - 12/31/2026 364 1 incomplete07/30/2025
EP-D  EP FOR WELL #2 NITRITE notes9 Years01/01/2020 - 12/31/2028 1,095 1 done 05/13/2020
EP-D  EP FOR WELL #2 RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,286 1 incomplete06/27/2017
EP-D  EP FOR WELL #2 RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,286 1 incomplete06/27/2017
EP-D  EP FOR WELL #2 RAD - URANIUM  9 Years01/01/2020 - 12/31/2028 1,095 1 done 05/13/2020
EP-D  EP FOR WELL #2 SOC notes3 Years 01/01/2026 - 12/31/2028 1,095 2 incomplete07/15/2024
EP-D  EP FOR WELL #2 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,095 1 incomplete07/15/2024
EP-H  EP FOR ASR WELL 2 ARSENIC notes9 Years01/01/2023 - 12/31/2031 2,190 1 done 07/15/2024
EP-H  EP FOR ASR WELL 2 IOC notes9 Years01/01/2020 - 12/31/2028 1,095 1 done 05/06/2020
EP-H  EP FOR ASR WELL 2 NITRATE  Yearly 01/01/2026 - 12/31/2026 364 1 incomplete07/15/2024
EP-H  EP FOR ASR WELL 2 NITRITE notes9 Years01/01/2020 - 12/31/2028 1,095 1 done 07/15/2024
EP-H  EP FOR ASR WELL 2 RAD - GROSS ALPHA  6 Years 01/01/2026 - 12/31/2031 2,190 1 incomplete05/06/2020
EP-H  EP FOR ASR WELL 2 RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,286 1 incomplete05/06/2020
EP-H  EP FOR ASR WELL 2 RAD - URANIUM  6 Years01/01/2023 - 12/31/2028 1,095 1 done 10/01/2024
EP-H  EP FOR ASR WELL 2 SOC notes3 Years 01/01/2026 - 12/31/2028 1,095 2 incomplete10/01/2024
EP-H  EP FOR ASR WELL 2 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,095 1 incomplete04/08/2024
EP-I  EP FOR ASR WELL 3 ARSENIC  3 Years 01/01/2026 - 12/31/2028 1,095 1 incomplete
EP-I  EP FOR ASR WELL 3 IOC  3 Years 01/01/2026 - 12/31/2028 1,095 1 incomplete
EP-I  EP FOR ASR WELL 3 NITRATE  Yearly 01/01/2026 - 12/31/2026 364 1 incomplete
EP-I  EP FOR ASR WELL 3 NITRITE  3 Years 01/01/2026 - 12/31/2028 1,095 1 incomplete
EP-I  EP FOR ASR WELL 3 RAD - GROSS ALPHA  Quarterly 01/01/2026 - 03/31/2026 89 1 incomplete
EP-I  EP FOR ASR WELL 3 RAD - RADIUM 226/228 Quarterly 01/01/2026 - 03/31/2026 89 1 incomplete
EP-I  EP FOR ASR WELL 3 RAD - URANIUM  Quarterly 01/01/2026 - 03/31/2026 89 1 incomplete
EP-I  EP FOR ASR WELL 3 SOC  Yearly 01/01/2026 - 12/31/2026 364 1 incomplete
EP-I  EP FOR ASR WELL 3 VOLATILE ORGANICS  Yearly 01/01/2026 - 12/31/2026 364 1 incomplete

7  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200203/31/20058Schedule Reflects 4 RT Samples Per WTP Per Quarter
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly04/01/200509/30/20054Sched Reflects 4/QT for EP-A,B,F,G - Take 6/QT for EP-C,D When Used.
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly07/01/201003/31/20122Sched Reflects 2/QT for EP-A,B - Take 5/QT for EP-C,D,H When Used.
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly10/01/200506/30/20103Sched Reflects 3/QT for EP-A,B,F - Take 6/QT for EP-C,D,G When Used.
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/200206/30/2016100Schedule Reflects PWB Joint Monitoring Plan
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months07/01/201606/30/201760
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly04/01/201212/31/20198Sample in Feb, May, Aug & Nov
EP-C  EP FOR ASR WELL 1ARSENIC  3 Years01/01/200212/31/20131
EP-D  EP FOR WELL #2ARSENIC  3 Years01/01/200512/31/20131
EP-D  EP FOR WELL #2RAD - URANIUM  6 Years01/01/200812/31/20191
EP-H  EP FOR ASR WELL 2ARSENIC  3 Years01/01/200512/31/20131
EP-H  EP FOR ASR WELL 2DI(2-ETHYLHEXYL) PHTHALATE   Quarterly04/01/201312/31/20131
EP-H  EP FOR ASR WELL 2DI(2-ETHYLHEXYL) PHTHALATE   Yearly01/01/201412/31/20161Sample in the 4th quarter each year
EP-H  EP FOR ASR WELL 2RAD - GROSS ALPHA  9 Years01/01/200812/31/20191Schedule Reflects Monitoring Reduction Granted
EP-H  EP FOR ASR WELL 2RAD - URANIUM  9 Years01/01/200812/31/20221Schedule Reflects Monitoring Reduction Granted
EP-H  EP FOR ASR WELL 2SOC  3 Years01/01/200512/31/20162Two consecutive quarterly samples.

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