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 07/01/2020 -
(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 Triggered sample(s) to be taken and reported 04/03/2024 - 04/14/2024
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 04/04/2024 - 04/14/2024 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/08/2023 - 12/19/2023
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/09/2023 - 12/19/2023 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 11/09/2023 - 11/20/2023
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/10/2023 - 11/20/2023 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 09/15/2023 - 09/26/2023
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/16/2023 - 09/26/2023 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 07/12/2023 - 07/23/2023
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 07/13/2023 - 07/23/2023 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 05/10/2023 - 05/21/2023
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 05/11/2023 - 05/21/2023 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/05/2022 - 12/16/2022
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/06/2022 - 12/16/2022 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 10/20/2022 - 10/31/2022
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 10/21/2022 - 10/31/2022 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 08/11/2022 - 08/22/2022
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 08/12/2022 - 08/22/2022 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 06/09/2022 - 06/20/2022
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/10/2022 - 06/20/2022 at DIST-A
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 04/08/2022 - 04/18/2022 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 04/07/2022 - 04/18/2022
1 at SRC-AA - WELL
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GWR: 5 Confirmation sample(s) to be taken and reported 03/17/2022 - 03/28/2022
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GWR: 1 Triggered sample(s) to be taken and reported 03/11/2022 - 03/22/2022
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 03/12/2022 - 03/22/2022 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 01/24/2022 - 02/04/2022
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 01/25/2022 - 02/04/2022 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 11/08/2021 - 11/19/2021
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/09/2021 - 11/19/2021 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 07/19/2021 - 07/30/2021
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 07/20/2021 - 07/30/2021 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 05/06/2021 - 05/17/2021
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 05/07/2021 - 05/17/2021 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 04/15/2021 - 04/26/2021
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 04/16/2021 - 04/26/2021 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 03/08/2021 - 03/19/2021
1 at SRC-AA - WELL
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GWR: 1 Triggered sample(s) to be taken and reported 01/07/2021 - 01/18/2021
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 01/08/2021 - 01/18/2021 at DIST-A
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GWR: 5 Confirmation sample(s) to be taken and reported 12/23/2020 - 01/03/2021
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GWR: 1 Triggered sample(s) to be taken and reported 12/18/2020 - 12/29/2020
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/19/2020 - 12/29/2020 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 09/22/2020 - 10/03/2020
1 at SRC-AA - WELL
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GWR: 1 Triggered sample(s) to be taken and reported 07/06/2020 - 07/17/2020
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 07/07/2020 - 07/17/2020 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 05/01/2020 - 05/31/2020 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 04/01/2020 - 04/30/2020 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 04/15/2020 - 04/26/2020
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 04/16/2020 - 04/26/2020 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 01/01/2020 - 03/31/2020 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 03/05/2020 - 03/16/2020
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 03/06/2020 - 03/16/2020 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 12/01/2019 - 12/31/2019 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 10/01/2019 - 10/31/2019 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2019 - 09/30/2019 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 09/19/2019 - 09/30/2019
1 at SRC-AA - WELL
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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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TCR: 1 Routine sample(s) per Month to be taken 03/01/2019 - 03/31/2019 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 01/01/2019 - 01/31/2019 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/21/2018 - 01/01/2019
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/22/2018 - 01/01/2019 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 07/01/2018 - 12/31/2018 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 06/01/2018 - 06/30/2018 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 05/23/2018 - 06/03/2018
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 05/24/2018 - 06/03/2018 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2018 - 05/31/2018 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 02/01/2018 - 02/28/2018 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 01/31/2018 - 02/11/2018
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 02/01/2018 - 02/11/2018 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 01/01/2018 - 01/31/2018 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/29/2017 - 01/09/2018
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/30/2017 - 01/09/2018 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 10/01/2017 - 12/31/2017 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 08/01/2017 - 08/31/2017 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 07/01/2017 - 07/31/2017 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 06/22/2017 - 07/03/2017
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/23/2017 - 07/03/2017 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2017 - 06/30/2017 at DIST-A
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TCR: 3 Temporary Routine sample(s) per Month to be taken 01/01/2017 - 01/31/2017 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/29/2016 - 01/09/2017
1 at SRC-AA - WELL
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TCR: 3 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/30/2016 - 01/09/2017 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2015 - 12/31/2016 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 02/01/2015 - 02/28/2015 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 01/01/2015 - 01/31/2015 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/29/2014 - 01/13/2015
1 at SRC-AA - WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/30/2014 - 01/13/2015 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 10/01/2013 - 12/31/2014 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 08/01/2013 - 08/31/2013 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 07/01/2013 - 07/31/2013 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/28/2013 - 07/12/2013 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 04/01/2013 - 06/30/2013 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 02/01/2013 - 02/28/2013 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 01/01/2013 - 01/31/2013 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 12/28/2012 - 01/12/2013
1 at SRC-AA - WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 12/29/2012 - 01/12/2013 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 12/01/2012 - 12/31/2012 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 10/01/2012 - 10/31/2012 at DIST-A
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TCR: 1 Routine sample(s) per Month to be taken 09/01/2012 - 09/30/2012 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 09/12/2012 - 09/27/2012
1 at SRC-AA - WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/13/2012 - 09/27/2012 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 07/01/2012 - 07/31/2012 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 06/23/2012 - 07/07/2012 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 06/22/2012 - 07/07/2012 at SRC-AA WELL
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TCR: 1 Routine sample(s) per Quarter to be taken 01/01/2012 - 06/30/2012 at DIST-A
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TCR: 5 Temporary Routine sample(s) per Month to be taken 12/01/2011 - 12/31/2011 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 11/21/2011 - 12/06/2011 at SRC-AA WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/22/2011 - 12/06/2011 at DIST-A
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TCR: 1 Routine sample(s) per Quarter to be taken 10/01/2011 - 11/30/2011 at DIST-A
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GWR: 1 Triggered sample(s) to be taken and reported 11/02/2011 - 11/17/2011 at SRC-AA WELL
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 11/03/2011 - 11/17/2011 at DIST-A
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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 Quarter to be taken 01/01/2010 - 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 WELL
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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 10/01/2009 - 10/31/2009 at DIST-A
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TCR: 4 Repeat sample(s) within 24 hours of a TC+ Routine Sample to be reported 09/28/2009 - 10/12/2009 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:
MARION CO HEALTH & HUMAN SERVICES
Greg DeBlase/Alisa Zastoupil/Andrew Duncan
(503) 588-5407
