OHA Drinking Water Services
OR41
PWS ID: 00914 ---- UMATILLA, CITY OF
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 9 000000MN
Feb 28, 2026 9 900000MN
Jan 31, 2026 9 1200000MN
Dec 31, 2025 9 1500000MN
Nov 30, 2025 9 1200000MN
Oct 31, 2025 9 1210300MN
Sep 30, 2025 9 1200000MN
Aug 31, 2025 9 1010300MN
Jul 31, 2025 9 900000MN
Jun 30, 2025 9 900000MN
May 31, 2025 9 900000MN
Apr 30, 2025 9 900000MN
Mar 31, 2025 9 900000MN
Feb 28, 2025 9 900000MN
Jan 31, 2025 9 900000MN
Dec 31, 2024 9 900000MN
Nov 30, 2024 9 900000MN
Oct 31, 2024 9 1000000MN
Sep 30, 2024 9 900000MN
Aug 31, 2024 9 1000000MN
Jul 31, 2024 9 900000MN
Jun 30, 2024 9 900000MN
May 31, 2024 9 1000000MN
Apr 30, 2024 9 1000000MN
Mar 31, 2024 9 600000MN
Feb 29, 2024 9 900000MN
Jan 31, 2024 9 900000MN
Dec 31, 2023 9 900000MN
Nov 30, 2023 9 900000MN
Oct 31, 2023 9 900000MN
Sep 30, 2023 9 1900000MN
Aug 31, 2023 9 900000MN
Jul 31, 2023 9 900000MN
Jun 30, 2023 9 900000MN
May 31, 2023 9 900000MN
Apr 30, 2023 9 1000000MN
Mar 31, 2023 9 900000MN
Feb 28, 2023 9 900000MN
Jan 31, 2023 9 900000MN
Dec 31, 2022 9 900000MN
Nov 30, 2022 9 900000MN
Oct 31, 2022 9 900000MN
Sep 30, 2022 9 900000MN
Aug 31, 2022 9 900000MN
Jul 31, 2022 9 900000MN
Jun 30, 2022 9 900000MN
May 31, 2022 9 900000MN
Apr 30, 2022 9 900000MN
Mar 31, 2022 9 900000MN
Feb 28, 2022 9 900000MN
Jan 31, 2022 9 900000MN
Dec 31, 2021 9 900000MN
Nov 30, 2021 9 1000000MN
Oct 31, 2021 9 800000MN
Sep 30, 2021 9 900000MN
Aug 31, 2021 9 900000MN
Jul 31, 2021 9 900000MN
Jun 30, 2021 9 1000000MN
May 31, 2021 8 900000MN
Apr 30, 2021 8 900000MN
Mar 31, 2021 8 800000MN
Feb 28, 2021 8 800000MN
Jan 31, 2021 8 800000MN
Dec 31, 2020 8 800000MN
Nov 30, 2020 8 800000MN
Oct 31, 2020 8 800000MN
Sep 30, 2020 8 800000MN
Aug 31, 2020 8 800000MN
Jul 31, 2020 8 800000MN
Jun 30, 2020 8 800000MN
May 31, 2020 8 800000MN
Apr 30, 2020 8 800000MN
Mar 31, 2020 8 800000MN
Feb 29, 2020 8 800000MN
Jan 31, 2020 8 800000MN
Dec 31, 2019 8 800000MN
Nov 30, 2019 8 000000MN
Oct 31, 2019 8 800000MN
Sep 30, 2019 8 800000MN
Aug 31, 2019 8 800000MN
Jul 31, 2019 8 800000MN
Jun 30, 2019 8 800000MN
May 31, 2019 8 800000MN
Apr 30, 2019 8 800000MN
Mar 31, 2019 8 800000MN
Feb 28, 2019 8 800000MN
Jan 31, 2019 8 800000MN
Dec 31, 2018 8 800000MN
Nov 30, 2018 8 800000MN
Oct 31, 2018 8 800000MN
Sep 30, 2018 8 800000MN
Aug 31, 2018 8 800000MN
Jul 31, 2018 8 800000MN
Jun 30, 2018 8 800000MN
May 31, 2018 8 800000MN
Apr 30, 2018 8 800000MN
Mar 31, 2018 8 800000MN
Feb 28, 2018 8 800000MN
Jan 31, 2018 8 800000MN
Dec 31, 2017 8 800000MN
Nov 30, 2017 8 800000MN
Oct 31, 2017 8 800000MN
Sep 30, 2017 8 810300MN
Aug 31, 2017 8 800000MN
Jul 31, 2017 8 800000MN
Jun 30, 2017 8 800000MN
May 31, 2017 8 800000MN
Apr 30, 2017 8 800000MN
Mar 31, 2017 8 800000MN
Feb 28, 2017 8 800000MN
Jan 31, 2017 8 800000MN
Dec 31, 2016 8 800000MN
Nov 30, 2016 8 800000MN
Oct 31, 2016 8 800000MN
Sep 30, 2016 8 800000MN
Aug 31, 2016 8 800000MN
Jul 31, 2016 8 800000MN
Jun 30, 2016 8 800000MN
May 31, 2016 8 800000MN
Apr 30, 2016 8 800000MN
Mar 31, 2016 8 800000MN
Feb 29, 2016 8 800000MN
Jan 31, 2016 8 800000MN
Dec 31, 2015 8 800000MN
Nov 30, 2015 8 800000MN
Oct 31, 2015 8 800000MN
Sep 30, 2015 8 800000MN
Aug 31, 2015 8 800000MN
Jul 31, 2015 8 800000MN
Jun 30, 2015 8 800000MN
May 31, 2015 8 800000MN
Apr 30, 2015 8 800000MN
Mar 31, 2015 8 800000MN
Feb 28, 2015 8 800000MN
Jan 31, 2015 8 800000MN
Dec 31, 2014 8 800000MN
Nov 30, 2014 8 800000MN
Oct 31, 2014 8 800000MN
Sep 30, 2014 8 800000MN
Aug 31, 2014 8 800000MN
Jul 31, 2014 8 800000MN
Jun 30, 2014 8 800000MN
May 31, 2014 8 800000MN
Apr 30, 2014 8 800000MN
Mar 31, 2014 8 800000MN
Feb 28, 2014 8 800000MN
Jan 31, 2014 8 800000MN
Dec 31, 2013 8 800000MN
Nov 30, 2013 8 800000MN
Oct 31, 2013 8 800000MN
Sep 30, 2013 8 800000MN
Aug 31, 2013 8 800000MN
Jul 31, 2013 8 800000MN
Jun 30, 2013 8 800000MN
May 31, 2013 8 800000MN
Apr 30, 2013 8 800000MN
Mar 31, 2013 8 800000MN
Feb 28, 2013 8 800000MN
Jan 31, 2013 8 800000MN
Dec 31, 2012 8 800000MN
Nov 30, 2012 8 800000MN
Oct 31, 2012 8 800000MN
Sep 30, 2012 8 800000MN
Aug 31, 2012 7 700000MN
Jul 31, 2012 7 700000MN
Jun 30, 2012 7 700000MN
May 31, 2012 7 700000MN
Apr 30, 2012 7 700000MN
Mar 31, 2012 7 700000MN
Feb 29, 2012 7 700000MN
Jan 31, 2012 7 700000MN
Dec 31, 2011 7 700000MN
Nov 30, 2011 7 700000MN
Oct 31, 2011 7 700000MN
Sep 30, 2011 7 700000MN
Aug 31, 2011 7 700000MN
Jul 31, 2011 7 700000MN
Jun 30, 2011 7 700000MN
May 31, 2011 7 700000MN
Apr 30, 2011 7 700000MN
Mar 31, 2011 7 700000MN
Feb 28, 2011 7 700000MN
Jan 31, 2011 7 700000MN
Dec 31, 2010 7 700000MN
Nov 30, 2010 7 700000MN
Oct 31, 2010 7 700000MN
Sep 30, 2010 7 700000MN
Aug 31, 2010 7 700000MN
Jul 31, 2010 7 700000MN
Jun 30, 2010 7 700000MN
May 31, 2010 7 700000MN
Apr 30, 2010 7 700000MN
Mar 31, 2010 7 700000MN
Feb 28, 2010 7 700000MN
Jan 31, 2010 7 700000MN
Dec 31, 2009 7 700000MN
Nov 30, 2009 7 700000MN
Oct 31, 2009 7 700000MN
Sep 30, 2009 7 700000MN
Aug 31, 2009 7 700000MN
Jul 31, 2009 7 700000MN
Jun 30, 2009 7 1000000MN
May 31, 2009 7 700000MN
Apr 30, 2009 7 700000MN
Mar 31, 2009 7 700000MN
Feb 28, 2009 7 700000MN
Jan 31, 2009 7 700000MN
Dec 31, 2008 7 700000MN
Nov 30, 2008 7 700000MN
Oct 31, 2008 7 700000MN
Sep 30, 2008 7 700000MN
Aug 31, 2008 7 700000MN
Jul 31, 2008 7 700000MN
Jun 30, 2008 7 700000MN
May 31, 2008 7 700000MN
Apr 30, 2008 7 700000MN
Mar 31, 2008 7 700000MN
Feb 29, 2008 7 700000MN
Jan 31, 2008 7 700000MN
Dec 31, 2007 7 700000MN
Nov 30, 2007 7 700000MN
Oct 31, 2007 7 700000MN
Sep 30, 2007 7 700000MN
Aug 31, 2007 7 700000MN
Jul 31, 2007 7 700000MN
Jun 30, 2007 7 700000MN
May 31, 2007 7 700000MN
Apr 30, 2007 7 700000MN
Mar 31, 2007 7 700000MN
Feb 28, 2007 7 700000MN
Jan 31, 2007 7 700000MN
Dec 31, 2006 7 700000MN
Nov 30, 2006 7 700000MN
Oct 31, 2006 7 700000MN
Sep 30, 2006 7 700000MN
Aug 31, 2006 7 700000MN
Jul 31, 2006 7 700000MN
Jun 30, 2006 7 700000MN
May 31, 2006 7 700000MN
Apr 30, 2006 7 700000MN
Mar 31, 2006 7 700000MN
Feb 28, 2006 7 710300MN
Jan 31, 2006 7 700000MN
Dec 31, 2005 7 700000MN
Nov 30, 2005 7 700000MN
Oct 31, 2005 7 700000MN
Sep 30, 2005 7 700000MN
Aug 31, 2005 7 700000MN
Jul 31, 2005 7 700000MN
Jun 30, 2005 7 700000MN
May 31, 2005 7 700000MN
Apr 30, 2005 7 700000MN
Mar 31, 2005 7 700000MN
Feb 28, 2005 7 700000MN
Jan 31, 2005 7 700000MN
Dec 31, 2004 7 700000MN
Nov 30, 2004 7 700000MN
Oct 31, 2004 7 700000MN
Sep 30, 2004 7 700000MN
Aug 31, 2004 7 700000MN
Jul 31, 2004 7 700000MN
Jun 30, 2004 4 700000MN
May 31, 2004 4 700000MN
Apr 30, 2004 4 600000MN
Mar 31, 2004 4 600000MN
Feb 29, 2004 4 600000MN
Jan 31, 2004 4 600000MN
Dec 31, 2003 5 600000MN
Nov 30, 2003 4 710300MN
Oct 31, 2003 4 600000MN
Sep 30, 2003 4 900000MN
Aug 31, 2003 4 600000MN
Jul 31, 2003 4 600000MN
Jun 30, 2003 4 600000MN
May 31, 2003 4 600000MN
Apr 30, 2003 4 600000MN
Mar 31, 2003 4 600000MN
Feb 28, 2003 4 600000MN
Jan 31, 2003 4 600000MN
Dec 31, 2002 4 600000MN
Nov 30, 2002 4 400000MN
Oct 31, 2002 4 400000MN
Sep 30, 2002 4 400000MN
Aug 31, 2002 4 400000MN
Jul 31, 2002 4 400000MN
Jun 30, 2002 4 400000MN
May 31, 2002 4 400000MN
Apr 30, 2002 4 400000MN
Mar 31, 2002 4 400000MN
Feb 28, 2002 4 400000MN
Jan 31, 2002 4 400000MN
Exclude results older than 2023