Current Open Coliform Sample Schedule
(subject to change based upon future test results)
DIST-A: 150 Routine sample(s) per Month to be taken beginning 11/01/2017 -
GWR: SRC-CA: 1 Assessment sample(s) per Year to be taken beginning 01/01/2012 -
(A begin date of 01/01/1991 indicates the year the Total Coliform Rule was established)
Public water systems that use chlorine or chloramines must measure the
residual disinfectant level at the same points in the distribution system and at the same time when total coliforms are sampled.
Repeat, Temporary Routine, and Prior Coliform Sample Schedules
(Schedules in bold reflect current schedules)
GWR: 1 Triggered sample(s) to be taken and reported 06/24/2024 - 07/05/2024
1 at SRC-CA - WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/25/2024 - 07/05/2024 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 02/12/2024 - 02/23/2024
1 at SRC-CA - WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/13/2024 - 02/23/2024 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 07/17/2023 - 07/28/2023
1 at SRC-CA - WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 07/18/2023 - 07/28/2023 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/20/2019 - 09/30/2019 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 06/19/2019 - 06/30/2019
1 at SRC-CA - WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/20/2019 - 06/30/2019 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 06/12/2019 - 06/23/2019
1 at SRC-CA - WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/13/2019 - 06/23/2019 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 07/11/2018 - 07/21/2018 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 07/10/2018 - 07/21/2018
1 at SRC-CA - WELL 1 - GRABHORN ASR
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GWR: 1 Triggered sample(s) to be taken and reported 07/03/2018 - 07/14/2018
1 at SRC-CA - WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 07/04/2018 - 07/14/2018 at DIST-A
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TCR: 120 Routine sample(s) per Month to be taken 01/01/1991 - 10/31/2017 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/07/2017 - 06/17/2017 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/08/2016 - 09/18/2016 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 03/26/2014 - 04/09/2014 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 05/16/2013 - 05/27/2013 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/18/2012 - 01/01/2013 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/29/2012 - 12/13/2012 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/25/2011 - 11/08/2011 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/12/2011 - 10/26/2011 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/14/2011 - 09/28/2011 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 09/13/2011 - 09/28/2011 at SRC-CA WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/08/2011 - 02/22/2011 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 11/18/2010 - 12/03/2010 at SRC-CA WELL 1 - GRABHORN ASR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/19/2010 - 12/03/2010 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 07/20/2010 - 08/03/2010 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/23/2009 - 10/07/2009 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/14/2008 - 08/28/2008 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/18/2007 - 01/01/2008 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/17/2007 - 10/31/2007 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/04/2007 - 10/18/2007 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 03/22/2007 - 04/05/2007 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 03/22/2006 - 04/05/2006 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/09/2005 - 08/23/2005 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/10/2004 - 08/24/2004 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 04/06/2004 - 04/20/2004 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 05/21/2002 - 06/04/2002 at DIST-A
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Hide schedules prior to 2021
Instructions and Notes
- If no prior sample schedules appear, then no prior schedules exist within the database.
- Schedules for Oregon very small systems might not appear. If the system is active, samples must be collected for the presence of coliform bacteria once per month or once per quarter depending on water type, seasonal operating cycle, or previous sampling results.
- If a sample tests positive for total coliform or E. coli, a minimum of 3 repeat samples must be collected. At water systems where quarterly monitoring takes place, 3 routine samples must be collected the month following one in which a routine sample tested positive for the presence of total coliform or E. coli.
Any time a sample tests positive for the presence of coliform bacteria, the system's operator should contact their regulator. For this water system, that is:
DRINKING WATER SERVICES
Nicole Alfafara
(503) 278-1531
