OHA Drinking Water Services
OR41
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT
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 2021
Period End Date Routines Required Routines Reported Routine TC+ Routine EC+ Repeats Reported Repeat TC+ Repeat EC+ Period Type
Apr 30, 2024 150 10700000MN
Mar 31, 2024 150 15200000MN
Feb 29, 2024 150 15110300MN
Jan 31, 2024 150 15100000MN
Dec 31, 2023 150 15100000MN
Nov 30, 2023 150 15200000MN
Oct 31, 2023 150 15900000MN
Sep 30, 2023 150 15100000MN
Aug 31, 2023 150 15300000MN
Jul 31, 2023 150 15010300MN
Jun 30, 2023 150 15300000MN
May 31, 2023 150 15100000MN
Apr 30, 2023 150 15000000MN
Mar 31, 2023 150 15000000MN
Feb 28, 2023 150 15000000MN
Jan 31, 2023 150 15800000MN
Dec 31, 2022 150 15200000MN
Nov 30, 2022 150 15000000MN
Oct 31, 2022 150 15300000MN
Sep 30, 2022 150 15200000MN
Aug 31, 2022 150 15200000MN
Jul 31, 2022 150 15800000MN
Jun 30, 2022 150 15200000MN
May 31, 2022 150 15300000MN
Apr 30, 2022 150 15000000MN
Mar 31, 2022 150 15100000MN
Feb 28, 2022 150 15300000MN
Jan 31, 2022 150 15000000MN
Dec 31, 2021 150 15200000MN
Nov 30, 2021 150 15400000MN
Oct 31, 2021 150 15300000MN
Sep 30, 2021 150 15100000MN
Aug 31, 2021 150 15200000MN
Jul 31, 2021 150 15100000MN
Jun 30, 2021 150 15200000MN
May 31, 2021 150 15200000MN
Apr 30, 2021 150 15100000MN
Mar 31, 2021 150 15200000MN
Feb 28, 2021 150 15200000MN
Jan 31, 2021 150 15200000MN
Dec 31, 2020 150 15200000MN
Nov 30, 2020 150 15300000MN
Oct 31, 2020 150 15200000MN
Sep 30, 2020 150 15200000MN
Aug 31, 2020 150 15200000MN
Jul 31, 2020 150 15200000MN
Jun 30, 2020 150 15200000MN
May 31, 2020 150 15200000MN
Apr 30, 2020 150 15200000MN
Mar 31, 2020 150 15200000MN
Feb 29, 2020 150 15300000MN
Jan 31, 2020 150 15200000MN
Dec 31, 2019 150 15200000MN
Nov 30, 2019 150 15200000MN
Oct 31, 2019 150 15300000MN
Sep 30, 2019 150 15410300MN
Aug 31, 2019 150 15200000MN
Jul 31, 2019 150 15200000MN
Jun 30, 2019 150 15230900MN
May 31, 2019 150 15200000MN
Apr 30, 2019 150 15200000MN
Mar 31, 2019 150 15200000MN
Feb 28, 2019 150 15200000MN
Jan 31, 2019 150 15200000MN
Dec 31, 2018 150 15200000MN
Nov 30, 2018 150 15200000MN
Oct 31, 2018 150 15200000MN
Sep 30, 2018 150 15200000MN
Aug 31, 2018 150 15200000MN
Jul 31, 2018 150 15220600MN
Jun 30, 2018 150 15200000MN
May 31, 2018 150 15200000MN
Apr 30, 2018 150 15200000MN
Mar 31, 2018 150 15200000MN
Feb 28, 2018 150 15200000MN
Jan 31, 2018 150 15200000MN
Dec 31, 2017 150 15200000MN
Nov 30, 2017 150 15500000MN
Oct 31, 2017 120 15200000MN
Sep 30, 2017 120 15400000MN
Aug 31, 2017 120 15200000MN
Jul 31, 2017 120 15200000MN
Jun 30, 2017 120 15210300MN
May 31, 2017 120 15200000MN
Apr 30, 2017 120 15200000MN
Mar 31, 2017 120 15200000MN
Feb 28, 2017 120 15200000MN
Jan 31, 2017 120 15200000MN
Dec 31, 2016 120 15200000MN
Nov 30, 2016 120 15200000MN
Oct 31, 2016 120 15200000MN
Sep 30, 2016 120 15210300MN
Aug 31, 2016 120 15200000MN
Jul 31, 2016 120 15200000MN
Jun 30, 2016 120 15200000MN
May 31, 2016 120 15200000MN
Apr 30, 2016 120 15200000MN
Mar 31, 2016 120 15300000MN
Feb 29, 2016 120 15200000MN
Jan 31, 2016 120 15200000MN
Dec 31, 2015 120 15200000MN
Nov 30, 2015 120 15200000MN
Oct 31, 2015 120 15200000MN
Sep 30, 2015 120 14800000MN
Aug 31, 2015 120 14400000MN
Jul 31, 2015 120 14500000MN
Jun 30, 2015 120 14400000MN
May 31, 2015 120 14400000MN
Apr 30, 2015 120 14400000MN
Mar 31, 2015 120 14400000MN
Feb 28, 2015 120 14400000MN
Jan 31, 2015 120 14400000MN
Dec 31, 2014 120 14400000MN
Nov 30, 2014 120 14400000MN
Oct 31, 2014 120 14400000MN
Sep 30, 2014 120 14400000MN
Aug 31, 2014 120 14400000MN
Jul 31, 2014 120 14400000MN
Jun 30, 2014 120 14400000MN
May 31, 2014 120 14700000MN
Apr 30, 2014 120 14400000MN
Mar 31, 2014 120 14410300MN
Feb 28, 2014 120 14400000MN
Jan 31, 2014 120 14400000MN
Dec 31, 2013 120 14400000MN
Nov 30, 2013 120 14400000MN
Oct 31, 2013 120 14400000MN
Sep 30, 2013 120 14400000MN
Aug 31, 2013 120 14400000MN
Jul 31, 2013 120 14400000MN
Jun 30, 2013 120 14400000MN
May 31, 2013 120 14411300MN
Apr 30, 2013 120 14400000MN
Mar 31, 2013 120 14400000MN
Feb 28, 2013 120 14400000MN
Jan 31, 2013 120 14400000MN
Dec 31, 2012 120 14410300MN
Nov 30, 2012 120 14410300MN
Oct 31, 2012 120 14400000MN
Sep 30, 2012 120 14400000MN
Aug 31, 2012 120 14400000MN
Jul 31, 2012 120 14400000MN
Jun 30, 2012 120 14400000MN
May 31, 2012 120 14400000MN
Apr 30, 2012 120 14400000MN
Mar 31, 2012 120 14400000MN
Feb 29, 2012 120 14400000MN
Jan 31, 2012 120 14400000MN
Dec 31, 2011 120 14400000MN
Nov 30, 2011 120 14400000MN
Oct 31, 2011 120 14420600MN
Sep 30, 2011 120 14410300MN
Aug 31, 2011 120 14400000MN
Jul 31, 2011 120 14400000MN
Jun 30, 2011 120 14400000MN
May 31, 2011 120 14400000MN
Apr 30, 2011 120 14400000MN
Mar 31, 2011 120 14400000MN
Feb 28, 2011 120 14410300MN
Jan 31, 2011 120 14400000MN
Dec 31, 2010 120 14400000MN
Nov 30, 2010 120 14410300MN
Oct 31, 2010 120 14400000MN
Sep 30, 2010 120 14400000MN
Aug 31, 2010 120 14400000MN
Jul 31, 2010 120 14410300MN
Jun 30, 2010 120 14400000MN
May 31, 2010 120 14400000MN
Apr 30, 2010 120 14400000MN
Mar 31, 2010 120 14400000MN
Feb 28, 2010 120 14400000MN
Jan 31, 2010 120 14500000MN
Dec 31, 2009 120 14400000MN
Nov 30, 2009 120 14400000MN
Oct 31, 2009 120 14400000MN
Sep 30, 2009 120 14520700MN
Aug 31, 2009 120 14400000MN
Jul 31, 2009 120 14400000MN
Jun 30, 2009 120 14400000MN
May 31, 2009 120 14400000MN
Apr 30, 2009 120 14400000MN
Mar 31, 2009 120 14400000MN
Feb 28, 2009 120 14400000MN
Jan 31, 2009 120 14400000MN
Dec 31, 2008 120 14500000MN
Nov 30, 2008 120 14400000MN
Oct 31, 2008 120 14400000MN
Sep 30, 2008 120 14400000MN
Aug 31, 2008 120 14410300MN
Jul 31, 2008 120 14400000MN
Jun 30, 2008 120 14400000MN
May 31, 2008 120 14400000MN
Apr 30, 2008 120 14400000MN
Mar 31, 2008 120 14400000MN
Feb 29, 2008 120 14400000MN
Jan 31, 2008 120 14400000MN
Dec 31, 2007 120 14410300MN
Nov 30, 2007 120 14400000MN
Oct 31, 2007 120 14420600MN
Sep 30, 2007 120 14400000MN
Aug 31, 2007 120 14400000MN
Jul 31, 2007 120 14400000MN
Jun 30, 2007 120 14400000MN
May 31, 2007 120 14400000MN
Apr 30, 2007 120 14400000MN
Mar 31, 2007 120 14410300MN
Feb 28, 2007 120 14400000MN
Jan 31, 2007 120 14400000MN
Dec 31, 2006 120 14400000MN
Nov 30, 2006 120 14400000MN
Oct 31, 2006 120 14400000MN
Sep 30, 2006 120 14400000MN
Aug 31, 2006 120 14400000MN
Jul 31, 2006 120 14400000MN
Jun 30, 2006 120 14400000MN
May 31, 2006 120 14400000MN
Apr 30, 2006 120 14400000MN
Mar 31, 2006 120 14410300MN
Feb 28, 2006 120 14400000MN
Jan 31, 2006 120 14400000MN
Dec 31, 2005 120 14400000MN
Nov 30, 2005 120 14400000MN
Oct 31, 2005 120 14400000MN
Sep 30, 2005 120 14400000MN
Aug 31, 2005 120 14410300MN
Jul 31, 2005 120 14400000MN
Jun 30, 2005 120 14400000MN
May 31, 2005 120 14400000MN
Apr 30, 2005 120 14400000MN
Mar 31, 2005 120 14400000MN
Feb 28, 2005 120 14400000MN
Jan 31, 2005 120 14400000MN
Dec 31, 2004 120 14400000MN
Nov 30, 2004 120 14400000MN
Oct 31, 2004 120 12900000MN
Sep 30, 2004 120 12400000MN
Aug 31, 2004 120 12410300MN
Jul 31, 2004 120 12400000MN
Jun 30, 2004 120 12400000MN
May 31, 2004 120 12300000MN
Apr 30, 2004 120 12410300MN
Mar 31, 2004 120 12400000MN
Feb 29, 2004 120 12400000MN
Jan 31, 2004 120 12400000MN
Dec 31, 2003 120 12400000MN
Nov 30, 2003 120 12400000MN
Oct 31, 2003 120 12400000MN
Sep 30, 2003 120 12400000MN
Aug 31, 2003 120 12400000MN
Jul 31, 2003 120 12400000MN
Jun 30, 2003 120 12400000MN
May 31, 2003 120 12400000MN
Apr 30, 2003 120 12400000MN
Mar 31, 2003 120 12300000MN
Feb 28, 2003 120 12400000MN
Jan 31, 2003 120 12400000MN
Dec 31, 2002 120 12400000MN
Nov 30, 2002 120 12400000MN
Oct 31, 2002 120 12400000MN
Sep 30, 2002 120 12300000MN
Aug 31, 2002 120 12400000MN
Jul 31, 2002 120 12400000MN
Jun 30, 2002 120 12400000MN
May 31, 2002 120 15410300MN
Apr 30, 2002 120 12400000MN
Mar 31, 2002 120 12400000MN
Feb 28, 2002 120 12400000MN
Jan 31, 2002 120 12400000MN
Exclude results older than 2021

More information for this water system: SDWIS ID 4065
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