OHA Drinking Water Services
OR41
PWS ID: 00724 ---- ST HELENS, CITY OF
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
May 01, 2024 DIST-A 15 15 0.71 0.7Y
Apr 01, 2024 DIST-A 15 15 0.7 0.7Y
Mar 01, 2024 DIST-A 15 15 0.70 0.7Y
Feb 01, 2024 DIST-A 15 15 0.7 0.7Y
Jan 01, 2024 DIST-A 15 15 0.69 0.7Y
Dec 01, 2023 DIST-A 15 15 0.7 0.7Y
Nov 01, 2023 DIST-A 15 15 0.6 0.7Y
Oct 01, 2023 DIST-A 15 15 0.64 0.7Y
Sep 01, 2023 DIST-A 15 15 0.69 0.7Y
Aug 01, 2023 DIST-A 15 15 0.75 0.7Y
Jul 01, 2023 DIST-A 15 15 0.74 0.7Y
Jun 01, 2023 DIST-A 15 15 0.73 0.7Y
May 01, 2023 DIST-A 15 15 0.6 0.7Y
Apr 01, 2023 DIST-A 15 15 0.66 0.7Y
Mar 01, 2023 DIST-A 15 15 0.72 0.7Y
Feb 01, 2023 DIST-A 15 15 0.7 0.7Y
Jan 01, 2023 DIST-A 15 15 0.70 0.7Y
Dec 01, 2022 DIST-A 15 15 0.73 0.7Y
Nov 01, 2022 DIST-A 15 15 0.7 0.7Y
Oct 01, 2022 DIST-A 15 15 0.7 0.7Y
Sep 01, 2022 DIST-A 15 15 0.7 0.7Y
Aug 01, 2022 DIST-A 15 15 0.7 0.7Y
Jul 01, 2022 DIST-A 15 15 0.7 0.7Y
Jun 01, 2022 DIST-A 15 15 0.69 0.7Y
May 01, 2022 DIST-A 15 15 0.74 0.7Y
Apr 01, 2022 DIST-A 15 15 0.74 0.7Y
Mar 01, 2022 DIST-A 15 15 0.70 0.7Y
Feb 01, 2022 DIST-A 15 15 0.75 0.7Y
Jan 01, 2022 DIST-A 15 15 0.7 0.7Y
Dec 01, 2021 DIST-A 15 15 0.8 0.7Y
Nov 01, 2021 DIST-A 15 15 0.65 0.7Y
Oct 01, 2021 DIST-A 15 15 0.66 0.7Y
Sep 01, 2021 DIST-A 15 15 0.73 0.7Y
Aug 01, 2021 DIST-A 15 15 0.64 0.7Y
Jul 01, 2021 DIST-A 15 15 0.69 0.7Y
Jun 01, 2021 DIST-A 15 15 0.73 0.7Y
May 01, 2021 DIST-A 15 15 0.66 0.7Y
Apr 01, 2021 DIST-A 15 15 0.8 0.7Y
Mar 01, 2021 DIST-A 15 15 0.67 0.7Y
Feb 01, 2021 DIST-A 15 15 0.67 0.7Y
Jan 01, 2021 DIST-A 15 15 0.69 0.7Y
Dec 01, 2020 DIST-A 15 15 0.68 0.7Y
Nov 01, 2020 DIST-A 15 15 0.72 0.7Y
Oct 01, 2020 DIST-A 15 15 0.66 0.7Y
Sep 01, 2020 DIST-A 15 15 0.69 0.7Y
Aug 01, 2020 DIST-A 15 15 0.73 0.7Y
Jul 01, 2020 DIST-A 15 15 0.67 0.7Y
Jun 01, 2020 DIST-A 15 15 0.63 0.8Y
May 01, 2020 DIST-A 15 15 0.7 0.8Y
Apr 01, 2020 DIST-A 15 15 0.75 0.8Y
Mar 01, 2020 DIST-A 15 15 0.76 0.8Y
Feb 01, 2020 DIST-A 15 15 0.77 0.8Y
Jan 01, 2020 DIST-A 15 15 0.77 0.8Y
Dec 01, 2019 DIST-A 15 15 0.78 0.8Y
Nov 01, 2019 DIST-A 15 15 0.8 0.8Y
Oct 01, 2019 DIST-A 15 15 0.73 0.8Y
Sep 01, 2019 DIST-A 15 15 0.84 0.8Y
Aug 01, 2019 DIST-A 15 15 0.74 0.7Y
Jul 01, 2019 DIST-A 15 15 0.74 0.7Y
Jun 01, 2019 DIST-A 15 15 0.73 0.7Y
May 01, 2019 DIST-A 15 15 0.77 0.7Y
Apr 01, 2019 DIST-A 15 15 0.72 0.7Y
Mar 01, 2019 DIST-A 15 15 0.8 0.7Y
Feb 01, 2019 DIST-A 15 15 0.7 0.7Y
Jan 01, 2019 DIST-A 15 15 0.75 0.7Y
Dec 01, 2018 DIST-A 15 15 0.8 0.7Y
Nov 01, 2018 DIST-A 15 15 0.7 0.7Y
Oct 01, 2018 DIST-A 15 15 0.74 0.7Y
Sep 01, 2018 DIST-A 15 15 0.68 0.7Y
Aug 01, 2018 DIST-A 15 15 0.75 0.7Y
Jul 01, 2018 DIST-A 15 15 0.72 0.7Y
Jun 01, 2018 DIST-A 15 15 0.69 0.7Y
May 01, 2018 DIST-A 15 15 0.7 0.7Y
Apr 01, 2018 DIST-A 15 15 0.7 0.7Y
Mar 01, 2018 DIST-A 15 15 0.73 0.7Y
Feb 01, 2018 DIST-A 15 15 0.7 0.7Y
Jan 01, 2018 DIST-A 15 15 0.70 0.7Y
Dec 01, 2017 DIST-A 15 15 0.7 0.7Y
Nov 01, 2017 DIST-A 18 18 0.75 0.7Y
Oct 01, 2017 DIST-A 15 15 0.68 0.7Y
Sep 01, 2017 DIST-A 15 15 0.69 0.7Y
Aug 01, 2017 DIST-A 15 15 0.7 0.7Y
Jul 01, 2017 DIST-A 15 15 0.7 0.7Y
Jun 01, 2017 DIST-A 15 15 0.69 0.7Y
May 01, 2017 DIST-A 15 15 0.73 0.7Y
Apr 01, 2017 DIST-A 15 15 0.69 0.7Y
Mar 01, 2017 DIST-A 15 15 0.77 0.7Y
Feb 01, 2017 DIST-A 15 15 0.7 0.7Y
Jan 01, 2017 DIST-A 18 18 0.73 0.7Y
Dec 01, 2016 DIST-A 15 15 0.74 0.7Y
Nov 01, 2016 DIST-A 15 15 0.73 0.7Y
Oct 01, 2016 DIST-A 15 15 0.70 0.7Y
Sep 01, 2016 DIST-A 15 15 0.70 0.7Y
Aug 01, 2016 DIST-A 15 15 0.74 0.7Y
Jul 01, 2016 DIST-A 15 15 0.7 0.6Y
Jun 01, 2016 DIST-A 15 15 0.66 0.6Y
May 01, 2016 DIST-A 15 15 0.67 0.6Y
Apr 01, 2016 DIST-A 15 15 0.64 0.6Y
Mar 01, 2016 DIST-A 15 15 0.6 0.6Y
Feb 01, 2016 DIST-A 15 15 0.65 0.7Y
Jan 01, 2016 DIST-A 15 15 0.62 0.7Y
Dec 01, 2015 DIST-A 15 15 0.64 0.7Y
Nov 01, 2015 DIST-A 15 15 0.66 0.7Y
Oct 01, 2015 DIST-A 15 15 0.58 0.7Y
Sep 01, 2015 DIST-A 15 15 0.64 0.7Y
Aug 01, 2015 DIST-A 15 15 0.67 0.7Y
Jul 01, 2015 DIST-A 15 15 0.63 0.7Y
Jun 01, 2015 DIST-A 15 15 0.72 0.7Y
May 01, 2015 DIST-A 15 15 0.60 0.6Y
Apr 01, 2015 DIST-A 15 15 0.7 0.6Y
Mar 01, 2015 DIST-A 15 15 0.78 0.6Y
Feb 01, 2015 DIST-A 15 15 0.65 0.6Y
Jan 01, 2015 DIST-A 15 15 0.68 0.6Y
Dec 01, 2014 DIST-A 15 15 0.65 0.6Y
Nov 01, 2014 DIST-A 15 15 0.65 0.6Y
Oct 01, 2014 DIST-A 15 15 0.61 0.6Y
Sep 01, 2014 DIST-A 15 15 0.62 0.6Y
Aug 01, 2014 DIST-A 15 15 0.6 0.7Y
Jul 01, 2014 DIST-A 18 19 0.6 0.7Y
Jun 01, 2014 DIST-A 15 15 0.6 0.7Y
May 01, 2014 DIST-A 15 15 0.62 0.7Y
Apr 01, 2014 DIST-A 15 15 0.59 0.7Y
Mar 01, 2014 DIST-A 15 15 0.60 0.7Y
Feb 01, 2014 DIST-A 15 15 0.6 0.7Y
Jan 01, 2014 DIST-A 15 15 0.60 0.7Y
Dec 01, 2013 DIST-A 15 15 0.81 0.7Y
Nov 01, 2013 DIST-A 18 18 0.82 0.7Y
Oct 01, 2013 DIST-A 15 15 0.71 0.7Y
Sep 01, 2013 DIST-A 15 15 0.7 0.7Y
Aug 01, 2013 DIST-A 15 15 0.7 0.7Y
Jul 01, 2013 DIST-A 18 18 0.73 0.7Y
Jun 01, 2013 DIST-A 15 15 0.76 0.7Y
May 01, 2013 DIST-A 15 15 0.71 0.7Y
Apr 01, 2013 DIST-A 15 15 0.7 0.7Y
Mar 01, 2013 DIST-A 15 15 0.78 0.7Y
Feb 01, 2013 DIST-A 15 15 0.73 0.7Y
Jan 01, 2013 DIST-A 15 15 0.72 0.6Y
Dec 01, 2012 DIST-A 15 15 0.66 0.6Y
Nov 01, 2012 DIST-A 15 15 0.7 0.6Y
Oct 01, 2012 DIST-A 15 15 0.73 0.6Y
Sep 01, 2012 DIST-A 15 15 0.58 0.6Y
Aug 01, 2012 DIST-A 15 15 0.7 0.6Y
Jul 01, 2012 DIST-A 15 15 0.6 0.6Y
Jun 01, 2012 DIST-A 15 15 0.62 0.6Y
May 01, 2012 DIST-A 15 15 0.62 0.6Y
Apr 01, 2012 DIST-A 15 15 0.5 0.6Y
Mar 01, 2012 DIST-A 15 15 0.66 0.6Y
Feb 01, 2012 DIST-A 15 15 0.64 0.6Y
Jan 01, 2012 DIST-A 15 15 0.63 0.6Y
Dec 01, 2011 DIST-A 15 15 0.71 0.6Y
Nov 01, 2011 DIST-A 15 15 0.67 0.6Y
Oct 01, 2011 DIST-A 15 15 0.56 0.7Y
Sep 01, 2011 DIST-A 15 15 0.64 0.7Y
Aug 01, 2011 DIST-A 15 15 0.70 0.7Y
Jul 01, 2011 DIST-A 15 15 0.64 0.6Y
Jun 01, 2011 DIST-A 15 15 0.57 0.6Y
May 01, 2011 DIST-A 15 15 .58 0.6Y
Apr 01, 2011 DIST-A 15 15 0.62 0.6Y
Mar 01, 2011 DIST-A 15 15 0.66 0.6Y
Feb 01, 2011 DIST-A 15 15 0.73 0.6Y
Jan 01, 2011 DIST-A 15 15 0.7000 0.6Y
Dec 01, 2010 DIST-A 15 15 0.65 0.6Y
Nov 01, 2010 DIST-A 15 15 0.76 0.6Y
Oct 01, 2010 DIST-A 15 15 0.59 0.6Y
Sep 01, 2010 DIST-A 15 15 0.68 0.6Y
Aug 01, 2010 DIST-A 15 15 0.61 0.6Y
Jul 01, 2010 DIST-A 15 15 0.58 0.6Y
Jun 01, 2010 DIST-A 15 15 0.51 0.6Y
May 01, 2010 DIST-A 15 15 0.60 0.6Y
Apr 01, 2010 DIST-A 15 10 0.57 0.6Y
Mar 01, 2010 DIST-A 10 10 0.59 0.6Y
Feb 01, 2010 DIST-A 10 10 0.67 0.6Y
Jan 01, 2010 DIST-A 10 10 0.63 0.6Y
Dec 01, 2009 DIST-A 10 10 0.64 0.6Y
Nov 01, 2009 DIST-A 10 10 0.60 0.6Y
Oct 01, 2009 DIST-A 10 10 0.50 0.6Y
Sep 01, 2009 DIST-A 10 10 0.59 0.6Y
Aug 01, 2009 DIST-A 10 10 0.55 0.6Y
Jul 01, 2009 DIST-A 10 10 0.62 0.6Y
Jun 01, 2009 DIST-A 10 10 0.69 0.6Y
May 01, 2009 DIST-A 10 10 0.61 0.6Y
Apr 01, 2009 DIST-A 10 10 0.69 0.6Y
Mar 01, 2009 DIST-A 10 10 0.57 0.5Y
Feb 01, 2009 DIST-A 10 10 0.61 0.5Y
Jan 01, 2009 DIST-A 10 10 .52 0.5Y
Dec 01, 2008 DIST-A 10 10 0.56 0.6Y
Nov 01, 2008 DIST-A 10 10 .51 0.6Y
Oct 01, 2008 DIST-A 10 10 .61 0.6Y
Sep 01, 2008 DIST-A 10 10 .56 0.5Y
Aug 01, 2008 DIST-A 10 10 .53 0.5Y
Jul 01, 2008 DIST-A 10 10 .51 0.5Y
Jun 01, 2008 DIST-A 10 10 .47 0.5Y
May 01, 2008 DIST-A 10 10 .49 0.6Y
Apr 01, 2008 DIST-A 10 10 .51 0.6Y
Mar 01, 2008 DIST-A 10 10 .57 0.6Y
Feb 01, 2008 DIST-A 10 10 .68 0.5Y
Jan 01, 2008 DIST-A 10 10 .62 0.5Y
Dec 01, 2007 DIST-A 10 10 .61 0.5Y
Nov 01, 2007 DIST-A 10 10 .48 0.6Y
Oct 01, 2007 DIST-A 10 10 .55 0.6Y
Sep 01, 2007 DIST-A 10 10 .49 0.6Y
Aug 01, 2007 DIST-A 10 10 .58 0.6Y
Jul 01, 2007 DIST-A 10 10 .48 0.6Y
Jun 01, 2007 DIST-A 10 10 .58 0.6Y
May 01, 2007 DIST-A 10 10 .61 0.6Y
Apr 01, 2007 DIST-A 10 10 .48 0.6Y
Mar 01, 2007 DIST-A 10 10 .41 0.6Y
Feb 01, 2007 DIST-A 10 10 .66 0.6Y
Jan 01, 2007 DIST-A 10 10 0.63 0.6Y
Dec 01, 2006 DIST-A 10 10 .67 0.5Y
Nov 01, 2006 DIST-A 10 10 .57 0.5Y
Oct 01, 2006 DIST-A 10 10 0.59 0.5Y
Sep 01, 2006 DIST-A 10 10 .58 0.5Y
Aug 01, 2006 DIST-A 10 10 .58 0.5Y
Jul 01, 2006 DIST-A 10 10 .48 0.5Y
Jun 01, 2006 DIST-A 10 13 .45 0.5Y
May 01, 2006 DIST-A 10 10 .51 0.4Y
Apr 01, 2006 DIST-A 10 10 .56 0.4Y
Mar 01, 2006 DIST-A 10 10 .41 0.4Y
Feb 01, 2006 DIST-A 10 10 .58 0.4Y
Jan 01, 2006 DIST-A 10 10 .46 0.4Y
Dec 01, 2005 DIST-A 10 10 .49 0.4Y
Nov 01, 2005 DIST-A 10 10 .32 0.4Y
Oct 01, 2005 DIST-A 10 10 .36 0.4Y
Sep 01, 2005 DIST-A 10 10 .48 0.4Y
Aug 01, 2005 DIST-A 10 10 .45 0.4Y
Jul 01, 2005 DIST-A 10 10 .37 0.4Y
Jun 01, 2005 DIST-A 10 10 .40 0.4Y
May 01, 2005 DIST-A 10 10 .45 0.4Y
Apr 01, 2005 DIST-A 10 11 .48 0.4Y
Mar 01, 2005 DIST-A 10 11 .41 0.4Y
Feb 01, 2005 DIST-A 10 10 .43 0.4Y
Jan 01, 2005 DIST-A 10 10 .39 0.4Y
Dec 01, 2004 DIST-A 10 10 .47 0.4Y
Nov 01, 2004 DIST-A 10 10 .40 0.4Y
Oct 01, 2004 DIST-A 10 10 .37 0.4Y
Sep 01, 2004 DIST-A 10 10 .30 0.4Y
 



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