OHA Drinking Water Services
OR41
PWS ID: 90550 ---- BONANZA HIGH/ELEM SCHOOLS
Coliform Summary History

Note: Samples for a given monitoring period are due 10 days after period end date. Therefore the most recent monitoring periods may show zero samples reported. This does not mean the water system is out of compliance.

Number of Samples Reported
Abbreviations: TC+: Total Coliform Positive, EC+: E. Coli Positive
Exclude results older than 2023
Period End Date Routines Required Routines Reported Routine TC+ Routine EC+ Repeats Reported Repeat TC+ Repeat EC+ Period Type
Mar 31, 2026 1 400000QT
Dec 31, 2025 1 400000QT
Sep 30, 2025 1 300000QT
Jun 30, 2025 1 300000QT
Mar 31, 2025 1 300000QT
Dec 31, 2024 1 300000QT
Sep 30, 2024 1 300000QT
Jun 30, 2024 1 300000QT
Mar 31, 2024 1 400000QT
Dec 31, 2023 1 400000QT
Sep 30, 2023 1 300000QT
Jun 30, 2023 1 300000QT
Mar 31, 2023 1 400000QT
Dec 31, 2022 1 400000QT
Sep 30, 2022 1 300000QT
Jun 30, 2022 1 300000QT
Mar 31, 2022 1 300000QT
Dec 31, 2021 1 500000QT
Sep 30, 2021 1 400000QT
Jun 30, 2021 1 500000QT
Mar 31, 2021 1 500000QT
Dec 31, 2020 1 600000QT
Sep 30, 2020 1 400000QT
Jun 30, 2020 1 600000QT
Mar 31, 2020 1 500000QT
Dec 31, 2019 1 500000QT
Sep 30, 2019 1 500000QT
Jun 30, 2019 1 600000QT
Mar 31, 2019 1 500000QT
Dec 31, 2018 1 300000QT
Sep 30, 2018 1 100000QT
Jun 30, 2018 1 300000QT
Mar 31, 2018 1 300000QT
Dec 31, 2017 1 300000QT
Sep 30, 2017 1 300000QT
Jun 30, 2017 1 300000QT
Mar 31, 2017 1 300000QT
Dec 31, 2016 1 300000QT
Sep 30, 2016 3 100000MN
Jun 30, 2016 1 300000QT
Mar 31, 2016 1 300000QT
Dec 31, 2015 1 300000QT
Sep 30, 2015 1 300000QT
Jun 30, 2015 1 300000QT
Mar 31, 2015 1 300000QT
Dec 31, 2014 1 600000QT
Sep 30, 2014 1 600000QT
Jun 30, 2014 1 600000QT
Mar 31, 2014 1 600000QT
Dec 31, 2013 1 600000QT
Sep 30, 2013 1 600000QT
Jun 30, 2013 1 600000QT
Mar 31, 2013 1 600000QT
Dec 31, 2012 1 600000QT
Sep 30, 2012 1 800000QT
Jun 30, 2012 1 800000QT
Mar 31, 2012 1 1000000QT
Dec 31, 2011 1 1000000QT
Sep 30, 2011 1 1000000QT
Jun 30, 2011 1 1200000QT
Mar 31, 2011 1 1200000QT
Dec 31, 2010 1 1200000QT
Sep 30, 2010 1 1200000QT
Jun 30, 2010 1 1200000QT
Mar 31, 2010 1 1000000QT
Dec 31, 2009 1 1000000QT
Sep 30, 2009 1 1200000QT
Jun 30, 2009 1 1200000QT
Mar 31, 2009 1 1200000QT
Dec 31, 2008 1 1200000QT
Sep 30, 2008 1 1200000QT
Jun 30, 2008 1 1200000QT
Mar 31, 2008 1 800000QT
Dec 31, 2007 1 1200000QT
Sep 30, 2007 1 1200000QT
Jun 30, 2007 1 1200000QT
Mar 31, 2007 1 1200000QT
Dec 31, 2006 1 1000000QT
Sep 30, 2006 1 600000QT
Jun 30, 2006 1 600000QT
Mar 31, 2006 1 600000QT
Dec 31, 2005 1 600000QT
Sep 30, 2005 1 300000QT
Jun 30, 2005 1 300000QT
Mar 31, 2005 1 300000QT
Dec 31, 2004 1 300000QT
Sep 30, 2004 1 300000QT
Jun 30, 2004 1 300000QT
Mar 31, 2004 1 300000QT
Dec 31, 2003 1 300000QT
Sep 30, 2003 1 300000QT
Jun 30, 2003 1 300000QT
Mar 31, 2003 1 300000QT
Dec 31, 2002 1 300000QT
Sep 30, 2002 1 300000QT
Jun 30, 2002 1 300000QT
Mar 31, 2002 1 300000QT
Exclude results older than 2023