Current Open Coliform Sample Schedule
(subject to change based upon future test results)
DIST-A: 1 Routine sample(s) per Quarter to be taken beginning 04/01/2021 -
(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 Assessment sample(s) Year 01/01/2014 - 12/31/2021 at SRC-AA CRANDALL AVE WELL
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TCR: 3 Temporary Routine sample(s) per Month to be taken 01/01/2021 - 01/31/2021 at DIST-A
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GWR: 5 Confirmation sample(s) to be taken and reported 12/28/2020 - 01/08/2021
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/23/2020 - 01/02/2021 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/22/2020 - 01/02/2021
1 at SRC-AA - CRANDALL AVE WELL
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2017 - 12/31/2020 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 02/01/2017 - 02/28/2017 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 07/01/2016 - 01/31/2017 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 01/19/2017 - 01/30/2017
1 at SRC-AA - CRANDALL AVE WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 01/20/2017 - 01/30/2017 at DIST-A
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GWR: 5 Confirmation sample(s) to be taken and reported 12/30/2016 - 01/10/2017
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TCR: 3 Temporary Routine sample(s) per Month to be taken 04/01/2016 - 04/30/2016 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 01/01/2016 - 03/31/2016 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 03/09/2016 - 03/20/2016
1 at SRC-AA - CRANDALL AVE WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 03/10/2016 - 03/20/2016 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 11/01/2015 - 11/30/2015 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2013 - 10/31/2015 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 10/02/2015 - 10/17/2015
1 at SRC-AA - CRANDALL AVE WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/03/2015 - 10/17/2015 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 02/01/2013 - 02/28/2013 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 10/01/2012 - 01/31/2013 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 01/09/2013 - 01/21/2013
1 at SRC-AA - CRANDALL AVE WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 01/10/2013 - 01/21/2013 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 09/01/2012 - 09/30/2012 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2010 - 08/31/2012 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/16/2012 - 08/30/2012 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 08/15/2012 - 08/30/2012
1 at SRC-AA - CRANDALL AVE WELL
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2010 - 06/30/2010 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 03/01/2010 - 03/31/2010 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 03/02/2010 - 03/16/2010 at SRC-AA CRANDALL AVE WELL
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TCR: 5 Temporary Routine sample(s) per Month to be taken 02/01/2010 - 02/28/2010 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/05/2010 - 02/19/2010 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 02/04/2010 - 02/18/2010 at SRC-AA CRANDALL AVE WELL
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TCR: 1 Routine sample(s) per Quarter to be taken 07/01/2009 - 01/31/2010 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 01/12/2010 - 01/26/2010 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 01/11/2010 - 01/25/2010 at SRC-AA CRANDALL AVE WELL
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TCR: 5 Temporary Routine sample(s) per Month to be taken 05/01/2009 - 05/31/2009 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2009 - 04/30/2009 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 04/03/2009 - 04/17/2009 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 02/01/2009 - 02/28/2009 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 01/01/2009 - 01/31/2009 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 01/07/2009 - 01/21/2009 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 11/01/2008 - 11/30/2008 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2008 - 10/31/2008 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/08/2008 - 10/22/2008 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 02/01/2008 - 02/29/2008 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 11/01/2007 - 01/31/2008 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 01/03/2008 - 01/17/2008 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2007 - 10/31/2007 at DIST-A
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TCR: 4 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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Hide schedules prior to 2022
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:
BENTON CO HEALTH DEPT
Scott Kruger/Robert Turkisher
(541) 766-6650/6169
