Current Open Coliform Sample Schedule
(subject to change based upon future test results)
DIST-A: 3 Routine sample(s) per Month to be taken beginning 02/01/2018 -
GWR: SRC-AC: 1 Assessment sample(s) per Year to be taken beginning 01/01/2014 -
GWR: SRC-AD: 1 Assessment sample(s) per Year to be taken beginning 01/01/2014 -
GWR: SRC-BA: 1 Assessment sample(s) per Year to be taken beginning 01/01/2014 -
GWR: SRC-BB: 1 Assessment sample(s) per Year to be taken beginning 01/01/2014 -
GWR: SRC-BC: 1 Assessment sample(s) per Year to be taken beginning 01/01/2014 -
GWR: SRC-BF: 1 Assessment sample(s) per Year to be taken beginning 01/01/2012 -
GWR: SRC-BG: 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)
TCR: 2 Routine sample(s) per Month to be taken 04/01/2015 - 01/31/2018 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 03/01/2015 - 03/31/2015 at DIST-A
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TCR: 2 Routine sample(s) per Month to be taken 04/01/2014 - 02/28/2015 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/12/2015 - 02/23/2015 at DIST-A
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GWR: 1 Assessment sample(s) Year 01/01/2014 - 12/31/2014 at SRC-BD FLOWER LN WELL
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GWR: 1 Assessment sample(s) Year 01/01/2014 - 12/31/2014 at SRC-BE 11TH ST. WELL (PALMER)
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TCR: 5 Temporary Routine sample(s) per Month to be taken 03/01/2014 - 03/31/2014 at DIST-A
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TCR: 2 Routine sample(s) per Month to be taken 10/01/2010 - 02/28/2014 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/13/2014 - 02/27/2014 at DIST-A
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GWR: 1 Assessment sample(s) Year 01/01/2012 - 12/31/2013 at SRC-AC MCDOUGAL WELL 1
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GWR: 1 Assessment sample(s) Year 01/01/2013 - 12/31/2013 at SRC-AD MCDOUGAL WELL 2
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GWR: 1 Assessment sample(s) per Month to be taken 05/01/2011 - 05/31/2012 at SRC-AD MCDOUGAL WELL 2
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GWR: 1 Assessment sample(s) per Month to be taken 05/01/2011 - 02/29/2012 at SRC-AA SPRING AREA A (LOWER SPRINGS)
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GWR: 1 Assessment sample(s) per Month to be taken 05/01/2011 - 02/29/2012 at SRC-AB SPRING AREA B (UPPER SPRINGS)
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GWR: 5 Confirmation sample(s) to be taken and reported 07/20/2011 - 08/04/2011
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GWR: 1 Assessment sample(s) per Month to be taken 01/01/2010 - 06/30/2011 at SRC-AC MCDOUGAL WELL 1
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TCR: 5 Temporary Routine sample(s) per Month to be taken 09/01/2010 - 09/30/2010 at DIST-A
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GWR: 5 Confirmation sample(s) to be taken and reported 09/15/2010 - 09/29/2010
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GWR: 5 Confirmation sample(s) to be taken and reported 09/15/2010 - 09/29/2010
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GWR: 5 Confirmation sample(s) to be taken and reported 09/15/2010 - 09/29/2010
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GWR: 5 Confirmation sample(s) to be taken and reported 09/15/2010 - 09/29/2010
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TCR: 2 Routine sample(s) per Month to be taken 11/01/2007 - 08/31/2010 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/05/2010 - 08/19/2010 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-BA WELL #1
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-BB WELL #3
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-BC WELL #4
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-AC MCDOUGAL WELL 1
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-AD MCDOUGAL WELL 2
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-BE 11TH ST. WELL (PALMER)
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-BD FLOWER LN WELL
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-AA SPRING AREA A (LOWER SPRINGS)
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GWR: 1 Triggered sample(s) to be taken and reported 08/04/2010 - 08/18/2010 at SRC-AB SPRING AREA B (UPPER SPRINGS)
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TCR: 5 Temporary Routine sample(s) per Month to be taken 10/01/2007 - 10/31/2007 at DIST-A
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TCR: 2 Routine sample(s) per Month to be taken 10/01/2003 - 09/30/2007 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/13/2007 - 09/27/2007 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 09/01/2003 - 09/30/2003 at DIST-A
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TCR: 2 Routine sample(s) per Month to be taken 08/01/2003 - 08/31/2003 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/14/2003 - 08/28/2003 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 07/01/2003 - 07/31/2003 at DIST-A
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TCR: 2 Routine sample(s) per Month to be taken 01/01/1991 - 06/30/2003 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/12/2003 - 06/26/2003 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/12/2003 - 06/26/2003 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:
YAMHILL CO HEALTH DEPT
Gary VanDerVeen/Melissa Wong
(503) 434-7439
environmentalhealth@co.yamhill.or.us
