Current Open Coliform Sample Schedule
(subject to change based upon future test results)
DIST-A: 1 Routine sample(s) per Month to be taken beginning 11/01/2020 -
(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 01/01/2019 - 12/31/2020 at SRC-AA IG FOR DUNCAN & NONAME CREEKS
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GWR: 5 Confirmation sample(s) to be taken and reported 12/15/2020 - 12/26/2020
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 1 Routine sample(s) per Month to be taken 10/01/2020 - 10/31/2020 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 01/01/2016 - 09/30/2020 at DIST-A
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GWR: 5 Confirmation sample(s) to be taken and reported 06/05/2019 - 06/15/2019
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GWR: 1 Triggered sample(s) to be taken and reported 12/04/2018 - 12/15/2018
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/05/2018 - 12/15/2018 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 06/12/2018 - 06/23/2018
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/13/2018 - 06/23/2018 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 02/07/2018 - 02/18/2018
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/08/2018 - 02/18/2018 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 09/06/2017 - 09/17/2017
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/07/2017 - 09/17/2017 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/03/2017 - 08/13/2017 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 08/02/2017 - 08/13/2017
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 5 Temporary Routine sample(s) per Month to be taken 12/01/2015 - 12/31/2015 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 11/16/2015 - 12/01/2015
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/17/2015 - 12/01/2015 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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GWR: 1 Triggered sample(s) to be taken and reported 11/09/2015 - 11/24/2015
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/10/2015 - 11/24/2015 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 07/01/2012 - 10/31/2015 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 10/11/2015 - 10/26/2015
1 at SRC-AA - IG FOR DUNCAN & NONAME CR
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/12/2015 - 10/26/2015 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 06/01/2012 - 06/30/2012 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 10/01/2011 - 05/31/2012 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 05/02/2012 - 05/16/2012 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 05/01/2012 - 05/16/2012 at SRC-AA IG FOR DUNCAN & NONAME CREEKS
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TCR: 5 Temporary Routine sample(s) per Month to be taken 09/01/2011 - 09/30/2011 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 06/01/2011 - 08/31/2011 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2011 - 08/19/2011 at SRC-AA IG FOR DUNCAN & NONAME CREEKS
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/05/2011 - 08/19/2011 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 05/01/2011 - 05/31/2011 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 04/30/2011 - 05/14/2011 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 04/29/2011 - 05/14/2011 at SRC-AA IG FOR DUNCAN & NONAME CREEKS
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TCR: 1 Routine sample(s) per Month to be taken 04/01/2011 - 04/30/2011 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 03/01/2011 - 03/31/2011 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/23/2011 - 03/09/2011 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 02/22/2011 - 03/09/2011 at SRC-AA IG FOR DUNCAN & NONAME CREEKS
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TCR: 1 Routine sample(s) per Month to be taken 07/01/2009 - 02/28/2011 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 06/01/2009 - 06/30/2009 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 03/01/2009 - 05/31/2009 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 05/05/2009 - 05/19/2009 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 Month to be taken 06/01/2008 - 01/31/2009 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 02/01/2008 - 05/30/2008 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 01/01/2008 - 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 12/19/2007 - 01/02/2008 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 05/01/2004 - 12/31/2007 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 04/01/2004 - 04/30/2004 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 12/01/2003 - 03/31/2004 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 03/09/2004 - 03/23/2004 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 11/01/2003 - 11/30/2003 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 01/01/1991 - 10/31/2003 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/14/2003 - 10/28/2003 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
Tia Skerbeck
(971)673-0417
