OHA Drinking Water Services
OR41
PWS ID: 01511 ---- OREGON CITY
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 40 43 1 0.9Y
Jan 01, 2026 DIST-A 40 43 0.8 0.9Y
Dec 01, 2025 DIST-A 40 42 0.76 0.9Y
Nov 01, 2025 DIST-A 40 43 0.8 0.9Y
Oct 01, 2025 DIST-A 40 42 0.88 0.9Y
Sep 01, 2025 DIST-A 40 43 0.77 0.9Y
Aug 01, 2025 DIST-A 40 42 0.9 0.9Y
Jul 01, 2025 DIST-A 40 42 0.85 0.9Y
Jun 01, 2025 DIST-A 40 42 0.94 0.9Y
May 01, 2025 DIST-A 40 43 0.95 0.9Y
Apr 01, 2025 DIST-A 40 43 1 0.9Y
Mar 01, 2025 DIST-A 40 43 0.84 0.9Y
Feb 01, 2025 DIST-A 40 42 0.9 0.9Y
Jan 01, 2025 DIST-A 40 42 0.89 0.9Y
Dec 01, 2024 DIST-A 40 42 0.86 0.9Y
Nov 01, 2024 DIST-A 43 45 0.77 0.9Y
Oct 01, 2024 DIST-A 40 43 0.88 0.9Y
Sep 01, 2024 DIST-A 40 44 0.93 0.9Y
Aug 01, 2024 DIST-A 40 44 0.94 0.9Y
Jul 01, 2024 DIST-A 40 44 0.94 0.9Y
Jun 01, 2024 DIST-A 40 42 1.04 0.9Y
May 01, 2024 DIST-A 40 42 0.98 0.9Y
Apr 01, 2024 DIST-A 40 44 1 0.9Y
Mar 01, 2024 DIST-A 40 43 0.98 0.9Y
Feb 01, 2024 DIST-A 40 44 0.93 0.9Y
Jan 01, 2024 DIST-A 40 44 0.9 0.9Y
Dec 01, 2023 DIST-A 40 42 0.8 0.9Y
Nov 01, 2023 DIST-A 40 42 0.7 0.9Y
Oct 01, 2023 DIST-A 40 44 0.79 1.0Y
Sep 01, 2023 DIST-A 40 42 0.92 1.0Y
Aug 01, 2023 DIST-A 40 44 0.9 1.0Y
Jul 01, 2023 DIST-A 40 42 0.9 1.0Y
Jun 01, 2023 DIST-A 40 45 1 1.0Y
May 01, 2023 DIST-A 40 44 1.01 1.0Y
Apr 01, 2023 DIST-A 40 44 1.01 1.0Y
Mar 01, 2023 DIST-A 40 44 0.98 1.0Y
Feb 01, 2023 DIST-A 40 42 1.04 1.0Y
Jan 01, 2023 DIST-A 40 44 1.0 1.0Y
Dec 01, 2022 DIST-A 40 42 1.00 1.0Y
Nov 01, 2022 DIST-A 40 44 0.9 1.0Y
Oct 01, 2022 DIST-A 40 43 1.09 0.9Y
Sep 01, 2022 DIST-A 40 44 1 0.9Y
Aug 01, 2022 DIST-A 40 54 1.00 0.9Y
Jul 01, 2022 DIST-A 40 44 1.05 0.9Y
Jun 01, 2022 DIST-A 40 44 0.94 0.8Y
May 01, 2022 DIST-A 40 44 0.96 0.8Y
Apr 01, 2022 DIST-A 40 44 0.88 0.8Y
Mar 01, 2022 DIST-A 40 55 0.95 0.8Y
Feb 01, 2022 DIST-A 40 44 1.01 0.8Y
Jan 01, 2022 DIST-A 40 44 1 0.8Y
Dec 01, 2021 DIST-A 40 44 0.84 0.8Y
Nov 01, 2021 DIST-A 40 44 0.63 0.8Y
Oct 01, 2021 DIST-A 40 43 0.63 0.8Y
Sep 01, 2021 DIST-A 40 44 0.7 0.8Y
Aug 01, 2021 DIST-A 40 55 0.76 0.8Y
Jul 01, 2021 DIST-A 40 44 0.75 0.8Y
Jun 01, 2021 DIST-A 40 55 0.80 0.8Y
May 01, 2021 DIST-A 40 44 0.79 0.8Y
Apr 01, 2021 DIST-A 40 43 0.86 0.8Y
Mar 01, 2021 DIST-A 40 55 0.83 0.8Y
Feb 01, 2021 DIST-A 40 44 0.86 0.8Y
Jan 01, 2021 DIST-A 40 44 0.85 0.8Y
Dec 01, 2020 DIST-A 40 42 0.78 0.8Y
Nov 01, 2020 DIST-A 40 42 0.71 0.8Y
Oct 01, 2020 DIST-A 40 43 0.66 0.8Y
Sep 01, 2020 DIST-A 40 43 0.78 0.8Y
Aug 01, 2020 DIST-A 40 44 0.8 0.8Y
Jul 01, 2020 DIST-A 40 44 0.8 0.8Y
Jun 01, 2020 DIST-A 40 44 0.78 0.9Y
May 01, 2020 DIST-A 40 44 0.84 0.9Y
Apr 01, 2020 DIST-A 40 44 0.93 0.9Y
Mar 01, 2020 DIST-A 40 44 0.95 0.9Y
Feb 01, 2020 DIST-A 40 44 0.91 0.9Y
Jan 01, 2020 DIST-A 40 42 0.91 0.9Y
Dec 01, 2019 DIST-A 40 42 0.9 0.9Y
Nov 01, 2019 DIST-A 40 42 0.86 0.9Y
Oct 01, 2019 DIST-A 40 55 0.7 0.9Y
Sep 01, 2019 DIST-A 40 44 0.8 0.9Y
Aug 01, 2019 DIST-A 40 44 0.8 0.9Y
Jul 01, 2019 DIST-A 40 44 0.83 0.9Y
Jun 01, 2019 DIST-A 40 42 0.85 0.9Y
May 01, 2019 DIST-A 40 44 0.91 0.9Y
Apr 01, 2019 DIST-A 40 44 0.87 0.9Y
Mar 01, 2019 DIST-A 40 44 1 0.9Y
Feb 01, 2019 DIST-A 40 44 0.9 0.9Y
Jan 01, 2019 DIST-A 40 44 0.9 0.9Y
Dec 01, 2018 DIST-A 40 44 0.82 0.9Y
Nov 01, 2018 DIST-A 40 41 0.84 0.9Y
Oct 01, 2018 DIST-A 40 43 0.8 0.9Y
Sep 01, 2018 DIST-A 40 43 0.89 0.9Y
Aug 01, 2018 DIST-A 40 43 0.88 0.9Y
Jul 01, 2018 DIST-A 40 42 0.9 0.9Y
Jun 01, 2018 DIST-A 40 40 0.90 0.9Y
May 01, 2018 DIST-A 40 40 0.92 0.9Y
Apr 01, 2018 DIST-A 40 40 0.83 0.9Y
Mar 01, 2018 DIST-A 40 40 0.9 0.9Y
Feb 01, 2018 DIST-A 40 40 0.94 0.9Y
Jan 01, 2018 DIST-A 40 40 0.90 0.9Y
Dec 01, 2017 DIST-A 40 40 0.9 0.9Y
Nov 01, 2017 DIST-A 40 40 0.8 0.9Y
Oct 01, 2017 DIST-A 40 40 0.8 0.9Y
Sep 01, 2017 DIST-A 40 40 0.9 0.9Y
Aug 01, 2017 DIST-A 40 40 0.83 0.9Y
Jul 01, 2017 DIST-A 43 43 0.77 1.0Y
Jun 01, 2017 DIST-A 40 40 0.96 1.0Y
May 01, 2017 DIST-A 40 40 0.90 1.0Y
Apr 01, 2017 DIST-A 40 40 0.91 1.0Y
Mar 01, 2017 DIST-A 40 40 0.97 1.0Y
Feb 01, 2017 DIST-A 40 40 1.1 1.0Y
Jan 01, 2017 DIST-A 40 40 1.06 1.0Y
Dec 01, 2016 DIST-A 40 40 1 1.0Y
Nov 01, 2016 DIST-A 40 40 1 1.0Y
Oct 01, 2016 DIST-A 43 43 0.8 1.0Y
Sep 01, 2016 DIST-A 40 40 1 1.0Y
Aug 01, 2016 DIST-A 40 40 0.96 1.0Y
Jul 01, 2016 DIST-A 40 40 0.99 1.0Y
Jun 01, 2016 DIST-A 40 40 1 1.0Y
May 01, 2016 DIST-A 40 40 1.09 1.0Y
Apr 01, 2016 DIST-A 40 40 1.1 1.0Y
Mar 01, 2016 DIST-A 40 40 1.08 0.9Y
Feb 01, 2016 DIST-A 40 40 1.06 0.9Y
Jan 01, 2016 DIST-A 40 40 1.12 0.9Y
Dec 01, 2015 DIST-A 40 40 0.97 0.9Y
Nov 01, 2015 DIST-A 40 40 0.77 0.9Y
Oct 01, 2015 DIST-A 40 40 0.86 0.9Y
Sep 01, 2015 DIST-A 40 40 0.8 0.9Y
Aug 01, 2015 DIST-A 40 40 0.88 0.9Y
Jul 01, 2015 DIST-A 40 40 0.83 1.0Y
Jun 01, 2015 DIST-A 40 40 1.0 1.0Y
May 01, 2015 DIST-A 40 40 1.08 1.0Y
Apr 01, 2015 DIST-A 40 40 0.92 1.0Y
Mar 01, 2015 DIST-A 40 40 1.01 1.0Y
Feb 01, 2015 DIST-A 40 40 1 1.0Y
Jan 01, 2015 DIST-A 40 40 1 1.0Y
Dec 01, 2014 DIST-A 40 40 0.9 1.0Y
Nov 01, 2014 DIST-A 40 40 1 1.0Y
Oct 01, 2014 DIST-A 40 40 0.89 1.0Y
Sep 01, 2014 DIST-A 40 40 0.89 1.0Y
Aug 01, 2014 DIST-A 40 40 0.89 1.0Y
Jul 01, 2014 DIST-A 40 40 0.94 0.9Y
Jun 01, 2014 DIST-A 40 40 1.00 0.9Y
May 01, 2014 DIST-A 40 40 0.97 0.9Y
Apr 01, 2014 DIST-A 40 40 1 0.9Y
Mar 01, 2014 DIST-A 40 40 0.97 0.9Y
Feb 01, 2014 DIST-A 40 40 1.01 0.9Y
Jan 01, 2014 DIST-A 40 40 1.00 1.0Y
Dec 01, 2013 DIST-A 30 30 1.01 0.9Y
Nov 01, 2013 DIST-A 33 33 1 0.9Y
Oct 01, 2013 DIST-A 30 30 0.77 0.9Y
Sep 01, 2013 DIST-A 30 30 0.89 0.9Y
Aug 01, 2013 DIST-A 30 30 0.8 0.9Y
Jul 01, 2013 DIST-A 30 30 0.91 1.0Y
Jun 01, 2013 DIST-A 30 30 0.9 1.0Y
May 01, 2013 DIST-A 30 30 1 1.0Y
Apr 01, 2013 DIST-A 30 30 1.0 1.0Y
Mar 01, 2013 DIST-A 30 30 1.04 1.0Y
Feb 01, 2013 DIST-A 30 30 1.1 0.9Y
Jan 01, 2013 DIST-A 30 30 0.97 0.9Y
Dec 01, 2012 DIST-A 30 30 0.88 0.9Y
Nov 01, 2012 DIST-A 30 30 0.7 0.9Y
Oct 01, 2012 DIST-A 30 30 1 0.9Y
Sep 01, 2012 DIST-A 30 30 0.95 0.9Y
Aug 01, 2012 DIST-A 30 30 1.0 0.9Y
Jul 01, 2012 DIST-A 30 30 0.9 0.9Y
Jun 01, 2012 DIST-A 30 30 0.99 0.9Y
May 01, 2012 DIST-A 30 30 1.0 0.9Y
Apr 01, 2012 DIST-A 30 30 0.88 0.9Y
Mar 01, 2012 DIST-A 30 30 0.92 0.9Y
Feb 01, 2012 DIST-A 30 30 0.89 0.9Y
Jan 01, 2012 DIST-A 30 30 0.81 0.9Y
Dec 01, 2011 DIST-A 30 30 0.92 0.9Y
Nov 01, 2011 DIST-A 30 30 0.77 0.9Y
Oct 01, 2011 DIST-A 30 30 0.74 0.9Y
Sep 01, 2011 DIST-A 30 30 0.84 0.8Y
Aug 01, 2011 DIST-A 30 30 0.85 0.8Y
Jul 01, 2011 DIST-A 30 30 0.95 0.8Y
Jun 01, 2011 DIST-A 30 30 1.1 0.8Y
May 01, 2011 DIST-A 30 30 0.94 0.8Y
Apr 01, 2011 DIST-A 30 30 0.85 0.8Y
Mar 01, 2011 DIST-A 30 30 0.87 0.8Y
Feb 01, 2011 DIST-A 30 30 0.86 0.8Y
Jan 01, 2011 DIST-A 30 30 0.83 0.8Y
Dec 01, 2010 DIST-A 30 30 0.73 0.8Y
Nov 01, 2010 DIST-A 30 30 0.69 0.8Y
Oct 01, 2010 DIST-A 30 30 0.69 0.8Y
Sep 01, 2010 DIST-A 30 30 0.76 0.9Y
Aug 01, 2010 DIST-A 30 30 0.80 0.9Y
Jul 01, 2010 DIST-A 30 30 0.82 0.9Y
Jun 01, 2010 DIST-A 30 30 0.89 0.9Y
May 01, 2010 DIST-A 30 30 0.98 0.9Y
Apr 01, 2010 DIST-A 30 30 0.86 0.9Y
Mar 01, 2010 DIST-A 30 30 0.84 0.9Y
Feb 01, 2010 DIST-A 30 30 0.86 0.9Y
Jan 01, 2010 DIST-A 30 30 0.8300 0.9Y
Dec 01, 2009 DIST-A 30 30 0.86 0.9Y
Nov 01, 2009 DIST-A 30 30 0.84 0.9Y
Oct 01, 2009 DIST-A 30 30 0.88 0.9Y
Sep 01, 2009 DIST-A 30 30 0.79 0.9Y
Aug 01, 2009 DIST-A 30 30 0.87 0.9Y
Jul 01, 2009 DIST-A 30 30 0.93 0.9Y
Jun 01, 2009 DIST-A 30 30 1.09 0.9Y
May 01, 2009 DIST-A 30 30 1 0.8Y
Apr 01, 2009 DIST-A 30 30 0.84 0.8Y
Mar 01, 2009 DIST-A 30 30 0.8 0.8Y
Feb 01, 2009 DIST-A 30 30 0.9 0.8Y
Jan 01, 2009 DIST-A 30 30 00.89 0.8Y
Dec 01, 2008 DIST-A 30 30 0.81 0.8Y
Nov 01, 2008 DIST-A 30 30 0.63 0.8Y
Oct 01, 2008 DIST-A 30 30 0.74 0.9Y
Sep 01, 2008 DIST-A 30 30 0.81 0.9Y
Aug 01, 2008 DIST-A 30 30 0.87 0.9Y
Jul 01, 2008 DIST-A 30 30 1.02 0.9Y
Jun 01, 2008 DIST-A 30 30 0.83 0.8Y