OHA Drinking Water Services
OR41
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT
Maximum Residual Disinfection Level (MRDL) Samples
MRDL Monitoring Requirements :: Excel Spreadsheet

Monitoring
Period		 Entry
Point		 Samples
Required		 Samples
Collected		 Period
Avg		 Annual
Avg		 Level
Compliance
Apr 01, 2024 DIST-A 150 130 1.39 1.3Y
Mar 01, 2024 DIST-A 150 152 1.22 1.3Y
Feb 01, 2024 DIST-A 153 154 1.2 1.3Y
Jan 01, 2024 DIST-A 150 151 1.1 1.3Y
Dec 01, 2023 DIST-A 150 151 1.1 1.3Y
Nov 01, 2023 DIST-A 150 152 1.4 1.4Y
Oct 01, 2023 DIST-A 150 159 1.18 1.4Y
Sep 01, 2023 DIST-A 150 151 1.36 1.4Y
Aug 01, 2023 DIST-A 150 153 1.4 1.4Y
Jul 01, 2023 DIST-A 153 153 1.44 1.4Y
Jun 01, 2023 DIST-A 150 153 1.3 1.4Y
May 01, 2023 DIST-A 150 151 1.5 1.4Y
Apr 01, 2023 DIST-A 150 150 1.3 1.4Y
Mar 01, 2023 DIST-A 150 150 1.4 1.4Y
Feb 01, 2023 DIST-A 150 150 1.42 1.4Y
Jan 01, 2023 DIST-A 150 158 1.27 1.3Y
Dec 01, 2022 DIST-A 150 152 1.5 1.3Y
Nov 01, 2022 DIST-A 150 150 1.5 1.3Y
Oct 01, 2022 DIST-A 150 153 1.48 1.3Y
Sep 01, 2022 DIST-A 150 152 1 1.2Y
Aug 01, 2022 DIST-A 150 152 1.3 1.2Y
Jul 01, 2022 DIST-A 150 158 1.4 1.2Y
Jun 01, 2022 DIST-A 150 152 1.4 1.2Y
May 01, 2022 DIST-A 150 153 1.41 1.2Y
Apr 01, 2022 DIST-A 150 150 1.39 1.2Y
Mar 01, 2022 DIST-A 150 151 1.24 1.2Y
Feb 01, 2022 DIST-A 150 153 1.3 1.2Y
Jan 01, 2022 DIST-A 150 150 1.17 1.2Y
Dec 01, 2021 DIST-A 150 152 1.2 1.2Y
Nov 01, 2021 DIST-A 150 154 1 1.2Y
Oct 01, 2021 DIST-A 150 153 1.0 1.2Y
Sep 01, 2021 DIST-A 150 151 0.9 1.2Y
Aug 01, 2021 DIST-A 150 152 1.16 1.2Y
Jul 01, 2021 DIST-A 150 151 1.2 1.2Y
Jun 01, 2021 DIST-A 150 152 1.21 1.2Y
May 01, 2021 DIST-A 150 152 1.40 1.2Y
Apr 01, 2021 DIST-A 150 151 1.3 1.2Y
Mar 01, 2021 DIST-A 150 152 1.36 1.2Y
Feb 01, 2021 DIST-A 150 152 1.32 1.2Y
Jan 01, 2021 DIST-A 150 152 1.2 1.1Y
Dec 01, 2020 DIST-A 150 152 1.20 1.1Y
Nov 01, 2020 DIST-A 150 152 1 1.1Y
Oct 01, 2020 DIST-A 150 152 1.0 1.1Y
Sep 01, 2020 DIST-A 150 152 1.1 1.1Y
Aug 01, 2020 DIST-A 150 152 1.2 1.1Y
Jul 01, 2020 DIST-A 150 152 1.2 1.1Y
Jun 01, 2020 DIST-A 150 152 1.2 1.1Y
May 01, 2020 DIST-A 150 152 1.2 1.1Y
Apr 01, 2020 DIST-A 150 152 1.25 1.1Y
Mar 01, 2020 DIST-A 150 152 1.2 1.1Y
Feb 01, 2020 DIST-A 150 152 1 1.1Y
Jan 01, 2020 DIST-A 150 152 1.2 1.1Y
Dec 01, 2019 DIST-A 150 152 1.1 1.1Y
Nov 01, 2019 DIST-A 150 152 1 1.1Y
Oct 01, 2019 DIST-A 150 152 1.0 1.1Y
Sep 01, 2019 DIST-A 153 157 0.9 1.2Y
Aug 01, 2019 DIST-A 150 152 1.19 1.2Y
Jul 01, 2019 DIST-A 150 152 1.17 1.2Y
Jun 01, 2019 DIST-A 156 161 1.0 1.2Y
May 01, 2019 DIST-A 150 152 1.33 1.1Y
Apr 01, 2019 DIST-A 150 152 1.22 1.1Y
Mar 01, 2019 DIST-A 150 152 1.1 1.1Y
Feb 01, 2019 DIST-A 150 152 1.2 1.1Y
Jan 01, 2019 DIST-A 150 152 1.37 1.1Y
Dec 01, 2018 DIST-A 150 152 1.2 1.1Y
Nov 01, 2018 DIST-A 150 152 1.10 1.1Y
Oct 01, 2018 DIST-A 150 152 1.1 1.1Y
Sep 01, 2018 DIST-A 150 152 1.0 1.1Y
Aug 01, 2018 DIST-A 150 152 1.1 1.1Y
Jul 01, 2018 DIST-A 156 158 1.1 1.1Y
Jun 01, 2018 DIST-A 150 152 0.9 1.1Y
May 01, 2018 DIST-A 150 152 1.2 1.1Y
Apr 01, 2018 DIST-A 150 152 1.2 1.1Y
Mar 01, 2018 DIST-A 150 152 1.2 1.1Y
Feb 01, 2018 DIST-A 150 152 1 1.1Y
Jan 01, 2018 DIST-A 150 152 1.17 1.1Y
Dec 01, 2017 DIST-A 150 152 1.1 1.1Y
Nov 01, 2017 DIST-A 150 155 1.2 1.1Y
Oct 01, 2017 DIST-A 120 152 1.2 1.1Y
Sep 01, 2017 DIST-A 120 154 1 1.0Y
Aug 01, 2017 DIST-A 120 152 1.0 1.0Y
Jul 01, 2017 DIST-A 120 152 0.98 1.0Y
Jun 01, 2017 DIST-A 123 155 1.10 1.0Y
May 01, 2017 DIST-A 120 152 1.14 1.0Y
Apr 01, 2017 DIST-A 120 152 1.11 1.0Y
Mar 01, 2017 DIST-A 120 152 1.11 1.0Y
Feb 01, 2017 DIST-A 120 152 1.0 1.0Y
Jan 01, 2017 DIST-A 120 152 1.14 1.0Y
Dec 01, 2016 DIST-A 120 152 1 1.0Y
Nov 01, 2016 DIST-A 120 152 0.9 1.0Y
Oct 01, 2016 DIST-A 120 152 0.9 1.0Y
Sep 01, 2016 DIST-A 123 155 0.90 1.0Y
Aug 01, 2016 DIST-A 120 152 1.11 1.0Y
Jul 01, 2016 DIST-A 120 152 1.1 1.0Y
Jun 01, 2016 DIST-A 120 152 1.0 1.0Y
May 01, 2016 DIST-A 120 152 1.11 1.0Y
Apr 01, 2016 DIST-A 120 152 1.0 1.0Y
Mar 01, 2016 DIST-A 120 153 1.0 1.0Y
Feb 01, 2016 DIST-A 120 152 1.1 1.0Y
Jan 01, 2016 DIST-A 120 152 1.0 1.0Y
Dec 01, 2015 DIST-A 120 152 1.0 1.0Y
Nov 01, 2015 DIST-A 120 152 1.0 1.0Y
Oct 01, 2015 DIST-A 120 152 1.1 1.0Y
Sep 01, 2015 DIST-A 120 148 1.0 1.0Y
Aug 01, 2015 DIST-A 120 144 1.0 1.0Y
Jul 01, 2015 DIST-A 120 144 1.0 1.0Y
Jun 01, 2015 DIST-A 120 144 1.1 1.0Y
May 01, 2015 DIST-A 120 144 0.90 1.0Y
Apr 01, 2015 DIST-A 120 144 0.91 1.0Y
Mar 01, 2015 DIST-A 120 144 0.94 1.0Y
Feb 01, 2015 DIST-A 120 144 0.98 1.1Y
Jan 01, 2015 DIST-A 120 144 0.9 1.1Y
Dec 01, 2014 DIST-A 120 144 1 1.1Y
Nov 01, 2014 DIST-A 120 144 0.89 1.1Y
Oct 01, 2014 DIST-A 120 144 0.9 1.2Y
Sep 01, 2014 DIST-A 120 144 1.01 1.2Y
Aug 01, 2014 DIST-A 120 144 1.1 1.2Y
Jul 01, 2014 DIST-A 120 144 1 1.1Y
Jun 01, 2014 DIST-A 120 144 1.17 1.1Y
May 01, 2014 DIST-A 120 147 1.02 1.1Y
Apr 01, 2014 DIST-A 120 144 1.35 1.2Y
Mar 01, 2014 DIST-A 123 147 1.35 1.1Y
Feb 01, 2014 DIST-A 120 144 1.3 1.1Y
Jan 01, 2014 DIST-A 120 144 1 1.1Y
Dec 01, 2013 DIST-A 120 144 1.45 1.1Y
Nov 01, 2013 DIST-A 120 144 1.2 1.1Y
Oct 01, 2013 DIST-A 120 144 1.1 1.0Y
Sep 01, 2013 DIST-A 120 144 0.8 1.0Y
Aug 01, 2013 DIST-A 120 144 1 1.0Y
Jul 01, 2013 DIST-A 120 144 1.0 1.0Y
Jun 01, 2013 DIST-A 120 144 1.2 1.0Y
May 01, 2013 DIST-A 123 147 1.1 1.0Y
Apr 01, 2013 DIST-A 120 144 1.2 1.0Y
Mar 01, 2013 DIST-A 120 144 1.2 1.0Y
Feb 01, 2013 DIST-A 120 144 1.05 0.9Y
Jan 01, 2013 DIST-A 120 144 1.03 0.9Y
Dec 01, 2012 DIST-A 123 147 0.9 0.9Y
Nov 01, 2012 DIST-A 123 147 0.9 0.9Y
Oct 01, 2012 DIST-A 120 144 0.7 0.9Y
Sep 01, 2012 DIST-A 120 144 0.83 0.9Y
Aug 01, 2012 DIST-A 120 144 0.9 0.9Y
Jul 01, 2012 DIST-A 120 144 1.0 0.9Y
Jun 01, 2012 DIST-A 120 144 1.07 0.9Y
May 01, 2012 DIST-A 120 144 1 0.9Y
Apr 01, 2012 DIST-A 120 144 0.9 0.9Y
Mar 01, 2012 DIST-A 120 144 0.95 0.9Y
Feb 01, 2012 DIST-A 120 144 0.8940 0.9Y
Jan 01, 2012 DIST-A 120 144 0.82 0.9Y
Dec 01, 2011 DIST-A 120 144 0.90 1.0Y
Nov 01, 2011 DIST-A 120 144 0.74 0.9Y
Oct 01, 2011 DIST-A 126 150 0.75 0.9Y
Sep 01, 2011 DIST-A 123 148 0.75 0.9Y
Aug 01, 2011 DIST-A 120 144 0.90 1.0Y
Jul 01, 2011 DIST-A 120 144 0.98 1.0Y
Jun 01, 2011 DIST-A 120 144 1.17 1.0Y
May 01, 2011 DIST-A 120 144 1.21 1.0Y
Apr 01, 2011 DIST-A 15 144 1.06 1.0Y
Mar 01, 2011 DIST-A 120 144 1.03 1.0Y
Feb 01, 2011 DIST-A 123 147 0.93 1.0Y
Jan 01, 2011 DIST-A 120 144 0.98 1.0Y
Dec 01, 2010 DIST-A 120 144 0.83 1.0Y
Nov 01, 2010 DIST-A 123 147 0.76 1.0Y
Oct 01, 2010 DIST-A 120 144 0.77 1.0Y
Sep 01, 2010 DIST-A 120 144 0.96 1.0Y
Aug 01, 2010 DIST-A 120 144 1.00 1.0Y
Jul 01, 2010 DIST-A 123 147 1.06 1.0Y
Jun 01, 2010 DIST-A 120 144 1.25 1.0Y
May 01, 2010 DIST-A 120 144 1.22 1.0Y
Apr 01, 2010 DIST-A 120 144 1.14 1.0Y
Mar 01, 2010 DIST-A 120 144 1.09 1.0Y
Feb 01, 2010 DIST-A 120 144 1.05 1.0Y
Jan 01, 2010 DIST-A 120 145 0.99 1.0Y
Dec 01, 2009 DIST-A 120 144 0.94 1.0Y
Nov 01, 2009 DIST-A 120 144 0.88 1.0Y
Oct 01, 2009 DIST-A 120 144 0.98 1.0Y
Sep 01, 2009 DIST-A 123 152 0.86 1.0Y
Aug 01, 2009 DIST-A 120 144 1.01 1.0Y
Jul 01, 2009 DIST-A 120 144 1.08 1.0Y
Jun 01, 2009 DIST-A 120 144 1.25 1.0Y
May 01, 2009 DIST-A 120 144 1 1.0Y
Apr 01, 2009 DIST-A 120 144 1.0 1.0Y
Mar 01, 2009 DIST-A 120 144 1.0 1.0Y
Feb 01, 2009 DIST-A 120 144 1.0 1.0Y
Jan 01, 2009 DIST-A 120 144 .91 1.0Y
Dec 01, 2008 DIST-A 120 145 .97 1.0Y
Nov 01, 2008 DIST-A 120 144 0.9 1.0Y
Oct 01, 2008 DIST-A 120 144 .95 1.0Y
Sep 01, 2008 DIST-A 120 144 .99 1.0Y
Aug 01, 2008 DIST-A 120 147 1.01 1.0Y
Jul 01, 2008 DIST-A 120 144 1.03 1.0Y
Jun 01, 2008 DIST-A 120 144 1.43 1.0Y
May 01, 2008 DIST-A 120 144 1.02 1.0Y
Apr 01, 2008 DIST-A 120 144 .96 1.0Y
Mar 01, 2008 DIST-A 120 144 .91 1.0Y
Feb 01, 2008 DIST-A 120 144 .95 1.0Y
Jan 01, 2008 DIST-A 120 144 .95 1.0Y
Dec 01, 2007 DIST-A 120 147 .86 1.0Y
Nov 01, 2007 DIST-A 120 144 .86 1.0Y
Oct 01, 2007 DIST-A 120 150 0.88 0.9Y
Sep 01, 2007 DIST-A 120 144 1.00 0.9Y
Aug 01, 2007 DIST-A 120 144 1.08 0.9Y
Jul 01, 2007 DIST-A 120 144 1.15 0.9Y
Jun 01, 2007 DIST-A 120 144 1.05 0.9Y
May 01, 2007 DIST-A 120 144 1.00 0.9Y
Apr 01, 2007 DIST-A 120 144 .96 0.9Y
Mar 01, 2007 DIST-A 0 147 .91 0.9Y
Feb 01, 2007 DIST-A 120 144 .91 0.9Y
Jan 01, 2007 DIST-A 120 144 .77 0.9Y
Dec 01, 2006 DIST-A 25 144 .88 0.9Y
Nov 01, 2006 DIST-A 0 144 .73 0.9Y
Oct 01, 2006 DIST-A 120 144 .86 0.9Y
Sep 01, 2006 DIST-A 120 144 .96 0.9Y
Aug 01, 2006 DIST-A 120 144 1.06 0.9Y
Jul 01, 2006 DIST-A 120 144 1.04 0.9Y
Jun 01, 2006 DIST-A 120 144 .95 0.9Y
May 01, 2006 DIST-A 120 144 1.10 0.9Y
Apr 01, 2006 DIST-A 120 144 .81 0.9Y
Mar 01, 2006 DIST-A 120 147 .81 0.9Y
Feb 01, 2006 DIST-A 120 144 .83 0.9Y
Jan 01, 2006 DIST-A 120 144 .83 0.9Y
Dec 01, 2005 DIST-A 120 144 .84 0.9Y
Nov 01, 2005 DIST-A 120 144 .77 0.8Y
Oct 01, 2005 DIST-A 120 144 .80 0.8Y
Sep 01, 2005 DIST-A 120 144 .87 0.8Y
Aug 01, 2005 DIST-A 120 144 1.13 0.8Y
Jul 01, 2005 DIST-A 120 144 .95 0.8Y
Jun 01, 2005 DIST-A 120 144 .84 0.8Y
May 01, 2005 DIST-A 120 144 .86 0.8Y
Apr 01, 2005 DIST-A 120 144 0.85 0.8Y
Mar 01, 2005 DIST-A 120 144 .78 0.8Y
Feb 01, 2005 DIST-A 120 144 .80 0.8Y
Jan 01, 2005 DIST-A 120 144 .76 0.8Y
Dec 01, 2004 DIST-A 120 144 .78 0.8Y
Nov 01, 2004 DIST-A 120 144 .67 0.8Y
Oct 01, 2004 DIST-A 120 129 .64 0.9Y
Sep 01, 2004 DIST-A 120 124 .74 1.0Y
 



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