OHA Drinking Water Services
OR41
PWS ID: 00457 ---- LAKE OSWEGO MUNICIPAL WATER
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
Jun 01, 2024 DIST-A 40 30 1.02 1.0Y
May 01, 2024 DIST-A 40 45 1 1.0Y
Apr 01, 2024 DIST-A 40 45 1 1.0Y
Mar 01, 2024 DIST-A 40 45 1.01 1.0Y
Feb 01, 2024 DIST-A 40 44 0.98 1.0Y
Jan 01, 2024 DIST-A 40 44 0.96 1.0Y
Dec 01, 2023 DIST-A 40 45 1 1.0Y
Nov 01, 2023 DIST-A 40 45 0.8 1.0Y
Oct 01, 2023 DIST-A 40 44 0.89 1.0Y
Sep 01, 2023 DIST-A 40 45 1 1.0Y
Aug 01, 2023 DIST-A 43 47 1.07 1.0Y
Jul 01, 2023 DIST-A 40 44 1 1.0Y
Jun 01, 2023 DIST-A 40 45 1.06 1.0Y
May 01, 2023 DIST-A 40 45 1.04 1.0Y
Apr 01, 2023 DIST-A 40 43 0.98 1.0Y
Mar 01, 2023 DIST-A 40 43 1 1.0Y
Feb 01, 2023 DIST-A 40 45 0.99 1.0Y
Jan 01, 2023 DIST-A 40 44 0.95 1.0Y
Dec 01, 2022 DIST-A 40 44 1 1.0Y
Nov 01, 2022 DIST-A 40 45 0.85 0.9Y
Oct 01, 2022 DIST-A 40 44 0.97 0.9Y
Sep 01, 2022 DIST-A 40 45 1.00 0.9Y
Aug 01, 2022 DIST-A 40 45 0.98 0.9Y
Jul 01, 2022 DIST-A 40 90 1 0.9Y
Jun 01, 2022 DIST-A 40 90 1 0.9Y
May 01, 2022 DIST-A 40 90 1 0.9Y
Apr 01, 2022 DIST-A 40 90 0.9 0.9Y
Mar 01, 2022 DIST-A 40 90 0.93 0.9Y
Feb 01, 2022 DIST-A 40 90 0.94 0.9Y
Jan 01, 2022 DIST-A 40 90 0.91 1.0Y
Dec 01, 2021 DIST-A 40 90 0.87 1.0Y
Nov 01, 2021 DIST-A 40 90 0.81 1.0Y
Oct 01, 2021 DIST-A 40 90 0.9 1.0Y
Sep 01, 2021 DIST-A 40 90 0.9 0.9Y
Aug 01, 2021 DIST-A 40 90 1 0.9Y
Jul 01, 2021 DIST-A 40 90 0.89 0.9Y
Jun 01, 2021 DIST-A 40 90 0.95 0.9Y
May 01, 2021 DIST-A 40 90 1.08 0.9Y
Apr 01, 2021 DIST-A 40 90 1.1 0.9Y
Mar 01, 2021 DIST-A 40 90 1 0.9Y
Feb 01, 2021 DIST-A 40 90 1.00 0.9Y
Jan 01, 2021 DIST-A 40 90 1.0 0.9Y
Dec 01, 2020 DIST-A 40 90 0.87 0.9Y
Nov 01, 2020 DIST-A 40 90 0.80 0.9Y
Oct 01, 2020 DIST-A 40 90 0.77 0.9Y
Sep 01, 2020 DIST-A 40 45 0.89 0.9Y
Aug 01, 2020 DIST-A 40 45 0.93 0.9Y
Jul 01, 2020 DIST-A 40 90 0.94 0.9Y
Jun 01, 2020 DIST-A 40 90 0.91 0.9Y
May 01, 2020 DIST-A 40 90 1 0.9Y
Apr 01, 2020 DIST-A 40 90 0.95 0.9Y
Mar 01, 2020 DIST-A 40 90 0.9 0.9Y
Feb 01, 2020 DIST-A 40 90 0.88 0.9Y
Jan 01, 2020 DIST-A 40 90 0.84 0.9Y
Dec 01, 2019 DIST-A 40 45 0.92 0.9Y
Nov 01, 2019 DIST-A 40 90 1 0.9Y
Oct 01, 2019 DIST-A 40 90 0.83 0.9Y
Sep 01, 2019 DIST-A 40 90 0.86 0.9Y
Aug 01, 2019 DIST-A 40 90 0.91 0.9Y
Jul 01, 2019 DIST-A 40 45 0.98 0.9Y
Jun 01, 2019 DIST-A 40 90 0.97 0.9Y
May 01, 2019 DIST-A 40 45 1.0 0.9Y
Apr 01, 2019 DIST-A 40 90 0.95 0.8Y
Mar 01, 2019 DIST-A 40 90 0.98 0.8Y
Feb 01, 2019 DIST-A 40 45 1 0.8Y
Jan 01, 2019 DIST-A 40 90 0.9 0.8Y
Dec 01, 2018 DIST-A 40 90 0.78 0.8Y
Nov 01, 2018 DIST-A 40 45 0.73 0.8Y
Oct 01, 2018 DIST-A 40 45 0.8 0.8Y
Sep 01, 2018 DIST-A 40 45 0.86 0.8Y
Aug 01, 2018 DIST-A 40 45 0.77 0.8Y
Jul 01, 2018 DIST-A 40 90 0.8 0.7Y
Jun 01, 2018 DIST-A 40 45 0.79 0.8Y
May 01, 2018 DIST-A 40 45 0.73 0.8Y
Apr 01, 2018 DIST-A 40 45 0.8 0.8Y
Mar 01, 2018 DIST-A 40 45 0.9 0.8Y
Feb 01, 2018 DIST-A 40 45 0.78 0.8Y
Jan 01, 2018 DIST-A 40 45 0.80 0.8Y
Dec 01, 2017 DIST-A 40 45 0.74 0.8Y
Nov 01, 2017 DIST-A 40 45 0.7 0.8Y
Oct 01, 2017 DIST-A 40 45 0.63 0.9Y
Sep 01, 2017 DIST-A 40 45 0.6 0.9Y
Aug 01, 2017 DIST-A 40 45 0.7 0.9Y
Jul 01, 2017 DIST-A 40 45 0.98 1.0Y
Jun 01, 2017 DIST-A 40 45 0.94 1.0Y
May 01, 2017 DIST-A 40 45 0.9 1.0Y
Apr 01, 2017 DIST-A 40 45 0.95 1.0Y
Mar 01, 2017 DIST-A 40 45 0.90 1.1Y
Feb 01, 2017 DIST-A 40 45 1 1.1Y
Jan 01, 2017 DIST-A 40 45 0.95 1.1Y
Dec 01, 2016 DIST-A 43 48 0.83 1.1Y
Nov 01, 2016 DIST-A 40 45 0.95 1.1Y
Oct 01, 2016 DIST-A 40 45 0.97 1.1Y
Sep 01, 2016 DIST-A 40 45 1.10 1.0Y
Aug 01, 2016 DIST-A 43 48 1.1 1.0Y
Jul 01, 2016 DIST-A 43 52 1 1.0Y
Jun 01, 2016 DIST-A 40 45 1.4 0.9Y
May 01, 2016 DIST-A 40 45 1.21 0.9Y
Apr 01, 2016 DIST-A 40 45 1.21 0.8Y
Mar 01, 2016 DIST-A 40 45 1.21 0.8Y
Feb 01, 2016 DIST-A 40 45 1.1 0.7Y
Jan 01, 2016 DIST-A 40 45 1.07 0.7Y
Dec 01, 2015 DIST-A 43 48 0.83 0.7Y
Nov 01, 2015 DIST-A 40 45 0.57 0.7Y
Oct 01, 2015 DIST-A 40 45 0.6 0.7Y
Sep 01, 2015 DIST-A 40 45 0.6 0.7Y
Aug 01, 2015 DIST-A 40 45 0.8 0.7Y
Jul 01, 2015 DIST-A 40 45 0.72 0.7Y
Jun 01, 2015 DIST-A 40 45 0.79 0.6Y
May 01, 2015 DIST-A 43 49 0.6 0.6Y
Apr 01, 2015 DIST-A 40 45 0.6 0.6Y
Mar 01, 2015 DIST-A 40 45 0.64 0.6Y
Feb 01, 2015 DIST-A 40 45 0.69 0.6Y
Jan 01, 2015 DIST-A 40 45 0.7 0.6Y
Dec 01, 2014 DIST-A 40 45 0.73 0.6Y
Nov 01, 2014 DIST-A 40 45 0.61 0.6Y
Oct 01, 2014 DIST-A 40 45 0.49 0.6Y
Sep 01, 2014 DIST-A 40 45 0.70 0.6Y
Aug 01, 2014 DIST-A 40 45 0.65 0.6Y
Jul 01, 2014 DIST-A 40 45 0.6 0.6Y
Jun 01, 2014 DIST-A 40 44 0.54 0.6Y
May 01, 2014 DIST-A 40 50 0.6 0.6Y
Apr 01, 2014 DIST-A 40 45 0.60 0.6Y
Mar 01, 2014 DIST-A 40 45 0.66 0.6Y
Feb 01, 2014 DIST-A 40 45 0.73 0.6Y
Jan 01, 2014 DIST-A 40 45 0.76 0.6Y
Dec 01, 2013 DIST-A 40 45 0.7 0.6Y
Nov 01, 2013 DIST-A 40 45 0.60 0.6Y
Oct 01, 2013 DIST-A 40 45 0.6 0.6Y
Sep 01, 2013 DIST-A 40 45 0.58 0.6Y
Aug 01, 2013 DIST-A 40 45 0.65 0.7Y
Jul 01, 2013 DIST-A 40 45 0.6 0.7Y
Jun 01, 2013 DIST-A 40 45 0.5 0.7Y
May 01, 2013 DIST-A 40 45 0.64 0.7Y
Apr 01, 2013 DIST-A 40 45 0.63 0.7Y
Mar 01, 2013 DIST-A 40 45 0.7 0.7Y
Feb 01, 2013 DIST-A 40 45 0.76 0.7Y
Jan 01, 2013 DIST-A 40 45 0.74 0.7Y
Dec 01, 2012 DIST-A 40 45 0.8 0.7Y
Nov 01, 2012 DIST-A 40 45 0.49 0.7Y
Oct 01, 2012 DIST-A 40 45 0.68 0.7Y
Sep 01, 2012 DIST-A 40 45 0.7 0.7Y
Aug 01, 2012 DIST-A 40 45 0.69 0.7Y
Jul 01, 2012 DIST-A 40 45 0.7 0.7Y
Jun 01, 2012 DIST-A 40 45 0.6 0.7Y
May 01, 2012 DIST-A 40 45 0.71 0.7Y
Apr 01, 2012 DIST-A 40 45 0.68 0.7Y
Mar 01, 2012 DIST-A 40 45 0.74 0.7Y
Feb 01, 2012 DIST-A 40 45 0.76 0.7Y
Jan 01, 2012 DIST-A 40 45 0.76 0.7Y
Dec 01, 2011 DIST-A 40 45 0.72 0.7Y
Nov 01, 2011 DIST-A 40 45 0.55 0.7Y
Oct 01, 2011 DIST-A 40 45 0.46 0.6Y
Sep 01, 2011 DIST-A 40 45 0.69 0.6Y
Aug 01, 2011 DIST-A 40 45 0.64 0.6Y
Jul 01, 2011 DIST-A 40 45 0.63 0.6Y
Jun 01, 2011 DIST-A 40 45 0.61 0.6Y
May 01, 2011 DIST-A 40 45 0.70 0.6Y
Apr 01, 2011 DIST-A 40 45 0.71 0.6Y
Mar 01, 2011 DIST-A 40 45 0.77 0.6Y
Feb 01, 2011 DIST-A 40 45 0.77 0.6Y
Jan 01, 2011 DIST-A 40 45 0.76 0.6Y
Dec 01, 2010 DIST-A 40 45 0.57 0.6Y
Nov 01, 2010 DIST-A 40 45 0.39 0.6Y
Oct 01, 2010 DIST-A 40 45 0.46 0.6Y
Sep 01, 2010 DIST-A 40 45 0.54 0.6Y
Aug 01, 2010 DIST-A 40 45 0.74 0.6Y
Jul 01, 2010 DIST-A 40 45 0.66 0.6Y
Jun 01, 2010 DIST-A 40 45 0.46 0.6Y
May 01, 2010 DIST-A 40 45 0.50 0.6Y
Apr 01, 2010 DIST-A 40 45 0.5500 0.6Y
Mar 01, 2010 DIST-A 40 40 0.62 0.6Y
Feb 01, 2010 DIST-A 40 45 0.69 0.6Y
Jan 01, 2010 DIST-A 40 45 0.7500 0.6Y
Dec 01, 2009 DIST-A 40 45 0.71 0.6Y
Nov 01, 2009 DIST-A 40 45 0.39 0.6Y
Oct 01, 2009 DIST-A 40 45 0.52 0.6Y
Sep 01, 2009 DIST-A 40 45 0.63 0.6Y
Aug 01, 2009 DIST-A 40 45 0.63 0.6Y
Jul 01, 2009 DIST-A 40 45 0.66 0.5Y
Jun 01, 2009 DIST-A 40 45 0.70 0.5Y
May 01, 2009 DIST-A 40 40 0.5Y
Apr 01, 2009 DIST-A 40 45 0.63 0.6Y
Mar 01, 2009 DIST-A 40 45 0.69 0.6Y
Feb 01, 2009 DIST-A 40 45 0.8 0.5Y
Jan 01, 2009 DIST-A 40 45 0.64 0.5Y
Dec 01, 2008 DIST-A 40 45 0.51 0.5Y
Nov 01, 2008 DIST-A 40 45 0.38 0.5Y
Oct 01, 2008 DIST-A 40 45 0.51 0.5Y
Sep 01, 2008 DIST-A 40 45 0.55 0.5Y
Aug 01, 2008 DIST-A 40 45 0.53 0.5Y
Jul 01, 2008 DIST-A 40 45 0.58 0.5Y
Jun 01, 2008 DIST-A 40 45 0.55 0.5Y
May 01, 2008 DIST-A 40 45 0.49 0.5Y
Apr 01, 2008 DIST-A 40 45 0.47 0.5Y
Mar 01, 2008 DIST-A 40 45 0.50 0.5Y
Feb 01, 2008 DIST-A 40 45 0.55 0.5Y
Jan 01, 2008 DIST-A 40 45 0.50 0.6Y
Dec 01, 2007 DIST-A 40 45 .57 0.6Y
Nov 01, 2007 DIST-A 40 45 .44 0.6Y
Oct 01, 2007 DIST-A 40 45 .43 0.6Y
Sep 01, 2007 DIST-A 40 45 .62 0.6Y
Aug 01, 2007 DIST-A 40 45 .58 0.6Y
Jul 01, 2007 DIST-A 40 45 .59 0.5Y
Jun 01, 2007 DIST-A 40 45 .61 0.5Y
May 01, 2007 DIST-A 40 45 .57 0.5Y
Apr 01, 2007 DIST-A 40 45 .58 0.5Y
Mar 01, 2007 DIST-A 40 45 .56 0.5Y
Feb 01, 2007 DIST-A 40 45 .65 0.5Y
Jan 01, 2007 DIST-A 40 45 .67 0.5Y
Dec 01, 2006 DIST-A 0 45 .58 0.5Y
Nov 01, 2006 DIST-A 0 45 .35 0.5Y
Oct 01, 2006 DIST-A 30 45 0.44 0.5Y
Sep 01, 2006 DIST-A 40 45 0.48 0.5Y
Aug 01, 2006 DIST-A 40 45 .50 0.5Y
Jul 01, 2006 DIST-A 40 45 0.51 0.5Y
Jun 01, 2006 DIST-A 40 45 0.46 0.5Y
May 01, 2006 DIST-A 40 45 0.51 0.4Y
Apr 01, 2006 DIST-A 40 45 0.42 0.4Y
Mar 01, 2006 DIST-A 40 45 0.40 0.4Y
Feb 01, 2006 DIST-A 40 45 .40 0.4Y
Jan 01, 2006 DIST-A 40 45 .40 0.4Y
Dec 01, 2005 DIST-A 40 405 1.30 0.4Y
Nov 01, 2005 DIST-A 40 45 0.30 0.3Y
Oct 01, 2005 DIST-A 40 45 0.34 0.3Y
Sep 01, 2005 DIST-A 40 45 .30 0.3Y
Aug 01, 2005 DIST-A 40 45 0.30 0.3Y
Jul 01, 2005 DIST-A 40 45 0.30 0.3Y
Jun 01, 2005 DIST-A 40 45 0.3 0.4Y
May 01, 2005 DIST-A 40 45 .34 0.4Y
Apr 01, 2005 DIST-A 40 45 0.40 0.4Y
Mar 01, 2005 DIST-A 40 45 0.34 0.4Y
Feb 01, 2005 DIST-A 40 45 0.45 0.4Y
Jan 01, 2005 DIST-A 40 45 0.40 0.3Y
Dec 01, 2004 DIST-A 40 45 .32 0.3Y
Nov 01, 2004 DIST-A 40 45 .36 0.3Y
Oct 01, 2004 DIST-A 40 45 .30 0.3Y
Sep 01, 2004 DIST-A 40 45 0.3 0.3Y
 



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