OHA Drinking Water Services
OR41
PWS ID: 00225 ---- CORVALLIS, 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
Feb 01, 2026 DIST-A 70 78 0.96 0.9Y
Jan 01, 2026 DIST-A 70 76 0.8 0.9Y
Dec 01, 2025 DIST-A 70 76 0.8 0.9Y
Nov 01, 2025 DIST-A 70 74 0.7 0.9Y
Oct 01, 2025 DIST-A 70 74 0.9 0.9Y
Sep 01, 2025 DIST-A 70 77 0.7 0.9Y
Aug 01, 2025 DIST-A 70 77 0.92 0.9Y
Jul 01, 2025 DIST-A 70 76 0.84 0.9Y
Jun 01, 2025 DIST-A 70 74 0.96 1.0Y
May 01, 2025 DIST-A 70 77 0.82 0.9Y
Apr 01, 2025 DIST-A 70 73 1.04 0.9Y
Mar 01, 2025 DIST-A 70 75 1 0.9Y
Feb 01, 2025 DIST-A 70 71 1.1 0.9Y
Jan 01, 2025 DIST-A 70 74 1.1 0.9Y
Dec 01, 2024 DIST-A 70 76 0.9 0.9Y
Nov 01, 2024 DIST-A 70 76 1 0.9Y
Oct 01, 2024 DIST-A 63 78 0.8 0.9Y
Sep 01, 2024 DIST-A 60 68 0.77 0.8Y
Aug 01, 2024 DIST-A 63 71 1.0 0.9Y
Jul 01, 2024 DIST-A 60 68 0.96 0.8Y
Jun 01, 2024 DIST-A 60 69 0.8 0.8Y
May 01, 2024 DIST-A 60 70 0.90 0.8Y
Apr 01, 2024 DIST-A 60 67 0.96 0.8Y
Mar 01, 2024 DIST-A 60 69 0.84 0.8Y
Feb 01, 2024 DIST-A 60 70 1 0.8Y
Jan 01, 2024 DIST-A 60 69 0.76 0.8Y
Dec 01, 2023 DIST-A 60 70 0.8 0.8Y
Nov 01, 2023 DIST-A 60 66 0.66 0.8Y
Oct 01, 2023 DIST-A 60 66 0.7 0.8Y
Sep 01, 2023 DIST-A 60 65 1 0.9Y
Aug 01, 2023 DIST-A 60 66 0.8 0.8Y
Jul 01, 2023 DIST-A 60 65 0.92 0.8Y
Jun 01, 2023 DIST-A 60 65 0.8 0.8Y
May 01, 2023 DIST-A 60 65 0.9 0.8Y
Apr 01, 2023 DIST-A 60 66 0.85 0.8Y
Mar 01, 2023 DIST-A 60 66 0.9 0.9Y
Feb 01, 2023 DIST-A 60 66 0.9 0.8Y
Jan 01, 2023 DIST-A 60 66 0.9 0.9Y
Dec 01, 2022 DIST-A 60 65 0.82 0.9Y
Nov 01, 2022 DIST-A 60 66 0.7 0.8Y
Oct 01, 2022 DIST-A 60 66 0.8 0.8Y
Sep 01, 2022 DIST-A 60 66 0.9 0.8Y
Aug 01, 2022 DIST-A 60 66 0.78 0.8Y
Jul 01, 2022 DIST-A 60 66 0.86 0.8Y
Jun 01, 2022 DIST-A 60 66 0.84 0.8Y
May 01, 2022 DIST-A 60 65 0.92 0.8Y
Apr 01, 2022 DIST-A 60 66 0.89 0.8Y
Mar 01, 2022 DIST-A 60 66 0.86 0.8Y
Feb 01, 2022 DIST-A 60 66 0.94 0.8Y
Jan 01, 2022 DIST-A 60 66 0.90 0.8Y
Dec 01, 2021 DIST-A 60 64 0.80 0.8Y
Nov 01, 2021 DIST-A 60 63 0.70 0.8Y
Oct 01, 2021 DIST-A 60 65 0.7 0.8Y
Sep 01, 2021 DIST-A 60 66 0.71 0.8Y
Aug 01, 2021 DIST-A 60 66 0.70 0.8Y
Jul 01, 2021 DIST-A 60 64 0.7 0.9Y
Jun 01, 2021 DIST-A 63 70 0.84 0.9Y
May 01, 2021 DIST-A 60 64 0.89 0.9Y
Apr 01, 2021 DIST-A 60 64 0.98 0.9Y
Mar 01, 2021 DIST-A 60 64 0.94 0.8Y
Feb 01, 2021 DIST-A 60 64 0.96 0.8Y
Jan 01, 2021 DIST-A 60 64 0.94 0.8Y
Dec 01, 2020 DIST-A 60 66 0.9 0.8Y
Nov 01, 2020 DIST-A 60 66 0.69 0.8Y
Oct 01, 2020 DIST-A 60 66 0.74 0.8Y
Sep 01, 2020 DIST-A 60 66 0.8 0.8Y
Aug 01, 2020 DIST-A 60 66 0.84 0.8Y
Jul 01, 2020 DIST-A 60 66 0.8 0.8Y
Jun 01, 2020 DIST-A 60 63 0.82 0.8Y
May 01, 2020 DIST-A 63 67 0.88 0.8Y
Apr 01, 2020 DIST-A 60 64 0.8 0.8Y
Mar 01, 2020 DIST-A 60 64 0.7 0.8Y
Feb 01, 2020 DIST-A 60 63 0.9 0.8Y
Jan 01, 2020 DIST-A 60 64 0.81 0.8Y
Dec 01, 2019 DIST-A 60 64 1 0.8Y
Nov 01, 2019 DIST-A 60 64 0.80 0.8Y
Oct 01, 2019 DIST-A 60 64 0.7 0.8Y
Sep 01, 2019 DIST-A 60 66 0.73 0.8Y
Aug 01, 2019 DIST-A 60 66 0.81 0.8Y
Jul 01, 2019 DIST-A 60 66 0.81 0.8Y
Jun 01, 2019 DIST-A 60 66 0.83 0.9Y
May 01, 2019 DIST-A 60 66 0.91 0.9Y
Apr 01, 2019 DIST-A 60 66 0.82 0.9Y
Mar 01, 2019 DIST-A 60 66 0.81 0.9Y
Feb 01, 2019 DIST-A 60 66 0.79 0.9Y
Jan 01, 2019 DIST-A 60 66 0.79 0.9Y
Dec 01, 2018 DIST-A 60 66 0.78 0.9Y
Nov 01, 2018 DIST-A 60 66 0.87 0.9Y
Oct 01, 2018 DIST-A 60 66 0.81 0.9Y
Sep 01, 2018 DIST-A 60 66 1 0.9Y
Aug 01, 2018 DIST-A 60 66 0.9 0.9Y
Jul 01, 2018 DIST-A 60 66 0.96 0.8Y
Jun 01, 2018 DIST-A 60 66 0.90 0.8Y
May 01, 2018 DIST-A 60 66 0.85 0.8Y
Apr 01, 2018 DIST-A 60 66 0.81 0.8Y
Mar 01, 2018 DIST-A 60 66 0.92 0.8Y
Feb 01, 2018 DIST-A 60 66 0.86 0.8Y
Jan 01, 2018 DIST-A 60 66 0.9 0.8Y
Dec 01, 2017 DIST-A 60 66 0.8 0.8Y
Nov 01, 2017 DIST-A 60 66 0.8 0.8Y
Oct 01, 2017 DIST-A 60 66 0.7 0.7Y
Sep 01, 2017 DIST-A 60 66 0.8 0.7Y
Aug 01, 2017 DIST-A 60 66 0.8 0.7Y
Jul 01, 2017 DIST-A 60 66 0.8 0.7Y
Jun 01, 2017 DIST-A 60 66 0.7 0.7Y
May 01, 2017 DIST-A 60 65 0.77 0.7Y
Apr 01, 2017 DIST-A 60 66 0.7 0.7Y
Mar 01, 2017 DIST-A 60 66 0.8 0.7Y
Feb 01, 2017 DIST-A 60 64 0.69 0.7Y
Jan 01, 2017 DIST-A 60 65 0.8 0.7Y
Dec 01, 2016 DIST-A 60 65 0.65 0.7Y
Nov 01, 2016 DIST-A 60 66 0.66 0.7Y
Oct 01, 2016 DIST-A 60 66 0.61 0.7Y
Sep 01, 2016 DIST-A 60 66 0.68 0.7Y
Aug 01, 2016 DIST-A 60 65 0.75 0.7Y
Jul 01, 2016 DIST-A 60 65 0.8 0.7Y
Jun 01, 2016 DIST-A 60 66 0.83 0.7Y
May 01, 2016 DIST-A 60 64 0.71 0.7Y
Apr 01, 2016 DIST-A 60 63 0.7 0.7Y
Mar 01, 2016 DIST-A 60 66 0.73 0.7Y
Feb 01, 2016 DIST-A 60 66 0.77 0.7Y
Jan 01, 2016 DIST-A 60 65 0.77 0.7Y
Dec 01, 2015 DIST-A 60 66 0.7 0.7Y
Nov 01, 2015 DIST-A 60 66 0.58 0.7Y
Oct 01, 2015 DIST-A 60 66 0.71 0.7Y
Sep 01, 2015 DIST-A 60 66 0.74 0.7Y
Aug 01, 2015 DIST-A 60 65 0.82 0.7Y
Jul 01, 2015 DIST-A 63 69 0.79 0.7Y
Jun 01, 2015 DIST-A 60 66 0.8 0.7Y
May 01, 2015 DIST-A 60 66 0.7 0.7Y
Apr 01, 2015 DIST-A 60 64 0.72 0.8Y
Mar 01, 2015 DIST-A 60 64 0.74 0.8Y
Feb 01, 2015 DIST-A 60 66 0.7 0.7Y
Jan 01, 2015 DIST-A 60 66 0.8 0.8Y
Dec 01, 2014 DIST-A 60 64 0.7 0.8Y
Nov 01, 2014 DIST-A 60 64 0.69 0.8Y
Oct 01, 2014 DIST-A 60 64 0.61 0.8Y
Sep 01, 2014 DIST-A 60 66 0.83 0.8Y
Aug 01, 2014 DIST-A 60 65 0.83 0.7Y
Jul 01, 2014 DIST-A 60 64 0.79 0.7Y
Jun 01, 2014 DIST-A 60 66 0.82 0.7Y
May 01, 2014 DIST-A 60 65 0.8 0.7Y
Apr 01, 2014 DIST-A 60 66 0.7 0.7Y
Mar 01, 2014 DIST-A 60 66 0.7 0.7Y
Feb 01, 2014 DIST-A 60 66 0.77 0.7Y
Jan 01, 2014 DIST-A 60 65 0.78 0.8Y
Dec 01, 2013 DIST-A 60 66 0.75 0.8Y
Nov 01, 2013 DIST-A 60 66 0.66 0.8Y
Oct 01, 2013 DIST-A 60 64 0.67 0.8Y
Sep 01, 2013 DIST-A 60 65 0.7 0.8Y
Aug 01, 2013 DIST-A 60 66 0.77 0.8Y
Jul 01, 2013 DIST-A 60 65 0.78 0.8Y
Jun 01, 2013 DIST-A 60 65 0.70 0.8Y
May 01, 2013 DIST-A 60 66 0.82 0.8Y
Apr 01, 2013 DIST-A 60 66 0.78 0.8Y
Mar 01, 2013 DIST-A 60 66 0.79 0.8Y
Feb 01, 2013 DIST-A 60 66 0.82 0.8Y
Jan 01, 2013 DIST-A 60 66 0.86 0.8Y
Dec 01, 2012 DIST-A 60 64 1 0.8Y
Nov 01, 2012 DIST-A 60 66 0.64 0.7Y
Oct 01, 2012 DIST-A 60 65 0.7 0.7Y
Sep 01, 2012 DIST-A 60 66 0.8 0.7Y
Aug 01, 2012 DIST-A 60 66 0.76 0.7Y
Jul 01, 2012 DIST-A 60 66 0.74 0.7Y
Jun 01, 2012 DIST-A 60 66 0.76 0.7Y
May 01, 2012 DIST-A 60 66 0.73 0.7Y
Apr 01, 2012 DIST-A 60 66 0.72 0.7Y
Mar 01, 2012 DIST-A 60 65 0.78 0.7Y
Feb 01, 2012 DIST-A 60 66 0.76 0.7Y
Jan 01, 2012 DIST-A 60 65 0.75 0.7Y
Dec 01, 2011 DIST-A 60 66 0.71 0.7Y
Nov 01, 2011 DIST-A 60 66 0.63 0.7Y
Oct 01, 2011 DIST-A 60 66 0.56 0.7Y
Sep 01, 2011 DIST-A 60 66 0.67 0.7Y
Aug 01, 2011 DIST-A 60 65 0.74 0.7Y
Jul 01, 2011 DIST-A 60 66 0.73 0.7Y
Jun 01, 2011 DIST-A 60 66 0.76 0.7Y
May 01, 2011 DIST-A 60 65 0.75 0.7Y
Apr 01, 2011 DIST-A 60 66 0.74 0.7Y
Mar 01, 2011 DIST-A 60 66 0.81 0.7Y
Feb 01, 2011 DIST-A 60 66 0.81 0.7Y
Jan 01, 2011 DIST-A 60 66 0.84 0.7Y
Dec 01, 2010 DIST-A 60 66 0.74 0.7Y
Nov 01, 2010 DIST-A 60 66 0.59 0.7Y
Oct 01, 2010 DIST-A 60 66 0.62 0.7Y
Sep 01, 2010 DIST-A 60 66 0.66 0.7Y
Aug 01, 2010 DIST-A 60 66 0.77 0.7Y
Jul 01, 2010 DIST-A 60 66 0.79 0.7Y
Jun 01, 2010 DIST-A 60 66 0.73 0.7Y
May 01, 2010 DIST-A 60 66 0.72 0.7Y
Apr 01, 2010 DIST-A 60 66 0.74 0.7Y
Mar 01, 2010 DIST-A 60 66 0.69 0.7Y
Feb 01, 2010 DIST-A 60 66 0.75 0.7Y
Jan 01, 2010 DIST-A 60 66 0.83 0.7Y
Dec 01, 2009 DIST-A 60 64 0.78 0.7Y
Nov 01, 2009 DIST-A 60 66 0.66 0.7Y
Oct 01, 2009 DIST-A 60 66 0.66 0.7Y
Sep 01, 2009 DIST-A 60 66 0.72 0.7Y
Aug 01, 2009 DIST-A 60 66 0.78 0.7Y
Jul 01, 2009 DIST-A 60 66 0.77 0.7Y
Jun 01, 2009 DIST-A 60 66 0.71 0.7Y
May 01, 2009 DIST-A 60 60 0.7Y
Apr 01, 2009 DIST-A 60 66 0.7 0.7Y
Mar 01, 2009 DIST-A 60 66 0.7 0.7Y
Feb 01, 2009 DIST-A 60 66 0.7 0.7Y
Jan 01, 2009 DIST-A 60 66 1 0.7Y
Dec 01, 2008 DIST-A 60 65 0.71 0.7Y
Nov 01, 2008 DIST-A 60 66 0.62 0.7Y
Oct 01, 2008 DIST-A 60 66 0.67 0.7Y
Sep 01, 2008 DIST-A 60 66 0.73 0.7Y
Aug 01, 2008 DIST-A 60 66 0.74 0.7Y
Jul 01, 2008 DIST-A 60 66 0.80 0.7Y
Jun 01, 2008 DIST-A 60 66 0.74 0.7Y
May 01, 2008 DIST-A 60 66 0.75 0.7Y
Apr 01, 2008 DIST-A 60 66 0.68 0.7Y
Mar 01, 2008 DIST-A 60 66 0.68 0.7Y
Feb 01, 2008 DIST-A 60 66 0.76 0.7Y
Jan 01, 2008 DIST-A 60 66 0.77 0.7Y
Dec 01, 2007 DIST-A 60 66 0.67 0.7Y
Nov 01, 2007 DIST-A 60 65 0.62 0.7Y
Oct 01, 2007 DIST-A 60 66 0.63 0.7Y
Sep 01, 2007 DIST-A 60 66 0.66 0.7Y
Aug 01, 2007 DIST-A 60 66 0.71 0.7Y
Jul 01, 2007 DIST-A 60 66 0.68 0.7Y
Jun 01, 2007 DIST-A 60 66 0.68 0.7Y
May 01, 2007 DIST-A 60 69 0.71 0.7Y
Apr 01, 2007 DIST-A 60 66 0.72 0.7Y
Mar 01, 2007 DIST-A 0 66 0.72 0.7Y
Feb 01, 2007 DIST-A 60 66 0.78 0.6Y
Jan 01, 2007 DIST-A 60 65 0.71 0.6Y
Dec 01, 2006 DIST-A 15 66 0.78 0.6Y
Nov 01, 2006 DIST-A 120 66 0.62 0.6Y
Oct 01, 2006 DIST-A 0 66 0.59 0.6Y
Sep 01, 2006 DIST-A 60 66 0.57 0.6Y
Aug 01, 2006 DIST-A 60 66 0.66 0.6Y
Jul 01, 2006 DIST-A 60 66 0.64 0.6Y
Jun 01, 2006 DIST-A 60 66 0.53 0.6Y
May 01, 2006 DIST-A 60 66 0.62 0.6Y
Apr 01, 2006 DIST-A 60 66 0.60 0.6Y
Mar 01, 2006 DIST-A 60 66 0.70 0.7Y
Feb 01, 2006 DIST-A 60 65 0.71 0.7Y
Jan 01, 2006 DIST-A 60 64 0.65 0.7Y
Dec 01, 2005 DIST-A 60 66 0.80 0.7Y
Nov 01, 2005 DIST-A 60 65 0.68 0.7Y
Oct 01, 2005 DIST-A 60 66 0.59 0.7Y
Sep 01, 2005 DIST-A 60 66 0.58 0.7Y
Aug 01, 2005 DIST-A 60 66 0.60 0.7Y
Jul 01, 2005 DIST-A 60 66 0.61 0.7Y
Jun 01, 2005 DIST-A 60 67 0.57 0.7Y
May 01, 2005 DIST-A 60 64 0.63 0.7Y
Apr 01, 2005 DIST-A 60 64 0.74 0.7Y
Mar 01, 2005 DIST-A 60 64 0.75 0.7Y
Feb 01, 2005 DIST-A 60 64 0.79 0.7Y
Jan 01, 2005 DIST-A 60 64 0.78 0.7Y
Dec 01, 2004 DIST-A 60 64 0.72 0.6Y
Nov 01, 2004 DIST-A 60 64 0.66 0.6Y
Oct 01, 2004 DIST-A 60 64 0.58 0.6Y
Sep 01, 2004 DIST-A 60 64 0.56 0.6Y