OHA Drinking Water Services
OR41
PWS ID: 01513 ---- HILLSBORO, 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, 2025 DIST-A 90 50 0.89 1.0Y
Apr 01, 2025 DIST-A 90 100 0.94 1.0Y
Mar 01, 2025 DIST-A 90 97 1.1 1.0Y
Feb 01, 2025 DIST-A 90 100 1.11 1.0Y
Jan 01, 2025 DIST-A 90 99 1.06 1.0Y
Dec 01, 2024 DIST-A 90 99 1 1.0Y
Nov 01, 2024 DIST-A 90 99 0.9 1.0Y
Oct 01, 2024 DIST-A 90 100 0.98 1.0Y
Sep 01, 2024 DIST-A 90 100 1 1.0Y
Aug 01, 2024 DIST-A 90 100 1.10 1.0Y
Jul 01, 2024 DIST-A 90 100 1.14 1.0Y
Jun 01, 2024 DIST-A 90 100 1 1.0Y
May 01, 2024 DIST-A 90 100 1.06 1.0Y
Apr 01, 2024 DIST-A 90 100 0.99 1.0Y
Mar 01, 2024 DIST-A 90 100 1.1 1.0Y
Feb 01, 2024 DIST-A 90 99 1.1 1.0Y
Jan 01, 2024 DIST-A 90 97 1.1 1.0Y
Dec 01, 2023 DIST-A 90 98 0.98 1.0Y
Nov 01, 2023 DIST-A 93 102 0.9 1.0Y
Oct 01, 2023 DIST-A 90 100 1 1.0Y
Sep 01, 2023 DIST-A 90 99 0.94 1.0Y
Aug 01, 2023 DIST-A 93 103 1.1 1.0Y
Jul 01, 2023 DIST-A 90 99 1.10 1.0Y
Jun 01, 2023 DIST-A 90 100 1.09 1.0Y
May 01, 2023 DIST-A 90 100 1.0 1.0Y
Apr 01, 2023 DIST-A 90 100 1.03 1.0Y
Mar 01, 2023 DIST-A 90 100 1.03 1.0Y
Feb 01, 2023 DIST-A 90 100 1.05 1.0Y
Jan 01, 2023 DIST-A 90 99 1.02 1.0Y
Dec 01, 2022 DIST-A 90 99 1.00 1.0Y
Nov 01, 2022 DIST-A 90 100 0.9 1.0Y
Oct 01, 2022 DIST-A 93 103 0.9 0.9Y
Sep 01, 2022 DIST-A 90 99 1.00 0.9Y
Aug 01, 2022 DIST-A 90 100 1 0.9Y
Jul 01, 2022 DIST-A 90 100 0.94 0.9Y
Jun 01, 2022 DIST-A 90 100 0.9 0.9Y
May 01, 2022 DIST-A 90 100 0.97 0.9Y
Apr 01, 2022 DIST-A 90 100 1 0.9Y
Mar 01, 2022 DIST-A 90 100 0.9 0.9Y
Feb 01, 2022 DIST-A 90 100 1 0.9Y
Jan 01, 2022 DIST-A 93 103 0.99 0.9Y
Dec 01, 2021 DIST-A 90 98 0.92 0.9Y
Nov 01, 2021 DIST-A 90 100 0.8 0.9Y
Oct 01, 2021 DIST-A 90 100 0.8 0.9Y
Sep 01, 2021 DIST-A 90 99 0.74 0.9Y
Aug 01, 2021 DIST-A 93 102 0.88 0.9Y
Jul 01, 2021 DIST-A 90 99 0.88 0.9Y
Jun 01, 2021 DIST-A 90 99 0.83 0.9Y
May 01, 2021 DIST-A 90 100 0.92 0.9Y
Apr 01, 2021 DIST-A 90 100 0.88 0.9Y
Mar 01, 2021 DIST-A 90 100 1 0.9Y
Feb 01, 2021 DIST-A 90 100 0.93 0.9Y
Jan 01, 2021 DIST-A 90 100 0.89 0.9Y
Dec 01, 2020 DIST-A 90 98 0.9 0.9Y
Nov 01, 2020 DIST-A 90 97 0.82 0.9Y
Oct 01, 2020 DIST-A 90 100 0.83 0.9Y
Sep 01, 2020 DIST-A 90 99 0.83 0.9Y
Aug 01, 2020 DIST-A 90 97 0.97 0.9Y
Jul 01, 2020 DIST-A 90 100 0.97 0.9Y
Jun 01, 2020 DIST-A 90 100 0.84 0.9Y
May 01, 2020 DIST-A 90 98 0.84 0.9Y
Apr 01, 2020 DIST-A 90 99 0.92 0.9Y
Mar 01, 2020 DIST-A 90 100 0.8 0.9Y
Feb 01, 2020 DIST-A 90 100 1 0.9Y
Jan 01, 2020 DIST-A 90 100 0.97 0.9Y
Dec 01, 2019 DIST-A 90 98 0.88 0.9Y
Nov 01, 2019 DIST-A 90 99 0.89 0.9Y
Oct 01, 2019 DIST-A 90 98 0.82 0.9Y
Sep 01, 2019 DIST-A 90 97 0.8 0.9Y
Aug 01, 2019 DIST-A 90 99 0.96 0.9Y
Jul 01, 2019 DIST-A 90 100 0.97 0.9Y
Jun 01, 2019 DIST-A 90 100 1.0 0.9Y
May 01, 2019 DIST-A 90 98 0.9 0.9Y
Apr 01, 2019 DIST-A 90 99 0.93 0.9Y
Mar 01, 2019 DIST-A 90 99 0.9 0.9Y
Feb 01, 2019 DIST-A 90 100 0.9 0.9Y
Jan 01, 2019 DIST-A 90 100 0.9 0.9Y
Dec 01, 2018 DIST-A 90 99 0.88 0.9Y
Nov 01, 2018 DIST-A 90 99 0.79 0.9Y
Oct 01, 2018 DIST-A 90 100 0.82 0.9Y
Sep 01, 2018 DIST-A 90 100 0.9 0.9Y
Aug 01, 2018 DIST-A 90 100 0.95 0.9Y
Jul 01, 2018 DIST-A 90 100 0.96 0.9Y
Jun 01, 2018 DIST-A 90 100 0.89 0.9Y
May 01, 2018 DIST-A 90 103 0.9 0.9Y
Apr 01, 2018 DIST-A 90 98 0.87 0.9Y
Mar 01, 2018 DIST-A 90 100 0.87 0.9Y
Feb 01, 2018 DIST-A 90 99 0.9 0.9Y
Jan 01, 2018 DIST-A 90 99 0.89 0.9Y
Dec 01, 2017 DIST-A 90 96 0.9 0.9Y
Nov 01, 2017 DIST-A 90 99 0.86 0.9Y
Oct 01, 2017 DIST-A 90 98 0.8 0.9Y
Sep 01, 2017 DIST-A 90 100 0.87 0.9Y
Aug 01, 2017 DIST-A 90 99 1 0.9Y
Jul 01, 2017 DIST-A 90 99 0.92 0.8Y
Jun 01, 2017 DIST-A 90 97 0.85 0.9Y
May 01, 2017 DIST-A 90 100 0.77 0.9Y
Apr 01, 2017 DIST-A 90 99 0.79 0.9Y
Mar 01, 2017 DIST-A 90 97 0.87 0.9Y
Feb 01, 2017 DIST-A 90 96 0.9 0.9Y
Jan 01, 2017 DIST-A 90 94 0.93 0.9Y
Dec 01, 2016 DIST-A 90 100 0.94 0.9Y
Nov 01, 2016 DIST-A 90 99 0.8 0.9Y
Oct 01, 2016 DIST-A 90 99 0.7 0.9Y
Sep 01, 2016 DIST-A 90 99 0.79 0.9Y
Aug 01, 2016 DIST-A 90 119 0.9 0.9Y
Jul 01, 2016 DIST-A 80 99 1 0.9Y
Jun 01, 2016 DIST-A 80 90 1 0.9Y
May 01, 2016 DIST-A 80 115 1 0.9Y
Apr 01, 2016 DIST-A 80 92 0.8 0.9Y
Mar 01, 2016 DIST-A 80 112 1 0.9Y
Feb 01, 2016 DIST-A 80 90 1 0.9Y
Jan 01, 2016 DIST-A 80 92 1 0.9Y
Dec 01, 2015 DIST-A 80 86 1 0.9Y
Nov 01, 2015 DIST-A 80 88 0.7 0.9Y
Oct 01, 2015 DIST-A 80 92 0.7 0.9Y
Sep 01, 2015 DIST-A 80 101 0.7 0.9Y
Aug 01, 2015 DIST-A 80 92 0.8 0.9Y
Jul 01, 2015 DIST-A 80 91 0.8 0.9Y
Jun 01, 2015 DIST-A 83 117 1 0.9Y
May 01, 2015 DIST-A 80 90 1 0.9Y
Apr 01, 2015 DIST-A 80 91 1 0.9Y
Mar 01, 2015 DIST-A 80 92 1 0.9Y
Feb 01, 2015 DIST-A 80 91 1 0.9Y
Jan 01, 2015 DIST-A 80 86 1 0.9Y
Dec 01, 2014 DIST-A 80 88 0.9 0.9Y
Nov 01, 2014 DIST-A 80 87 1 0.9Y
Oct 01, 2014 DIST-A 80 92 0.7 0.9Y
Sep 01, 2014 DIST-A 70 91 0.8 0.9Y
Aug 01, 2014 DIST-A 73 82 1 0.9Y
Jul 01, 2014 DIST-A 70 79 1 0.9Y
Jun 01, 2014 DIST-A 70 76 1 0.9Y
May 01, 2014 DIST-A 70 79 0.8 0.9Y
Apr 01, 2014 DIST-A 70 80 0.8 0.9Y
Mar 01, 2014 DIST-A 70 80 0.8 0.9Y
Feb 01, 2014 DIST-A 70 78 1 0.9Y
Jan 01, 2014 DIST-A 70 80 0.8 0.9Y
Dec 01, 2013 DIST-A 70 77 1 0.9Y
Nov 01, 2013 DIST-A 70 81 0.8 0.9Y
Oct 01, 2013 DIST-A 70 93 1 0.9Y
Sep 01, 2013 DIST-A 70 78 0.8 0.9Y
Aug 01, 2013 DIST-A 70 78 1 0.9Y
Jul 01, 2013 DIST-A 70 100 0.9 0.8Y
Jun 01, 2013 DIST-A 70 77 0.8 0.8Y
May 01, 2013 DIST-A 73 81 1 0.8Y
Apr 01, 2013 DIST-A 70 98 1 0.8Y
Mar 01, 2013 DIST-A 70 78 0.8 0.8Y
Feb 01, 2013 DIST-A 73 82 1 0.8Y
Jan 01, 2013 DIST-A 70 75 0.9 0.8Y
Dec 01, 2012 DIST-A 70 74 0.8 0.7Y
Nov 01, 2012 DIST-A 70 77 0.7 0.7Y
Oct 01, 2012 DIST-A 76 112 0.7 0.7Y
Sep 01, 2012 DIST-A 70 80 0.7 0.7Y
Aug 01, 2012 DIST-A 70 79 0.8 0.7Y
Jul 01, 2012 DIST-A 70 79 0.8 0.7Y
Jun 01, 2012 DIST-A 73 81 0.7 0.7Y
May 01, 2012 DIST-A 70 80 0.7 0.7Y
Apr 01, 2012 DIST-A 70 80 0.7 0.7Y
Mar 01, 2012 DIST-A 70 80 0.74 0.7Y
Feb 01, 2012 DIST-A 70 79 0.77 0.7Y
Jan 01, 2012 DIST-A 70 89 0.75 0.7Y
Dec 01, 2011 DIST-A 70 80 0.8 0.8Y
Nov 01, 2011 DIST-A 70 80 0.7 0.8Y
Oct 01, 2011 DIST-A 70 80 0.7 0.8Y
Sep 01, 2011 DIST-A 70 80 0.78 0.8Y
Aug 01, 2011 DIST-A 70 100 0.7860 0.8Y
Jul 01, 2011 DIST-A 73 82 0.72 0.8Y
Jun 01, 2011 DIST-A 70 80 0.72 0.8Y
May 01, 2011 DIST-A 70 94 0.7 0.8Y
Apr 01, 2011 DIST-A 70 80 0.74 0.8Y
Mar 01, 2011 DIST-A 70 80 0.79 0.8Y
Feb 01, 2011 DIST-A 70 75 0.76 0.8Y
Jan 01, 2011 DIST-A 70 100 0.82 0.8Y
Dec 01, 2010 DIST-A 70 79 0.85 0.8Y
Nov 01, 2010 DIST-A 70 97 0.7 0.7Y
Oct 01, 2010 DIST-A 73 81 0.75 0.7Y
Sep 01, 2010 DIST-A 70 80 0.71 0.7Y
Aug 01, 2010 DIST-A 70 99 0.82 0.7Y
Jul 01, 2010 DIST-A 70 80 0.81 0.7Y
Jun 01, 2010 DIST-A 70 100 0.71 0.7Y
May 01, 2010 DIST-A 70 80 0.71 0.7Y
Apr 01, 2010 DIST-A 70 70 0.74 0.7Y
Mar 01, 2010 DIST-A 70 100 0.73 0.8Y
Feb 01, 2010 DIST-A 70 77 0.75 0.8Y
Jan 01, 2010 DIST-A 70 72 0.74 0.8Y
Dec 01, 2009 DIST-A 73 101 0.75 0.8Y
Nov 01, 2009 DIST-A 70 78 0.66 0.8Y
Oct 01, 2009 DIST-A 70 80 0.74 0.8Y
Sep 01, 2009 DIST-A 70 100 0.76 0.8Y
Aug 01, 2009 DIST-A 70 80 0.76 0.8Y
Jul 01, 2009 DIST-A 70 79 0.77 0.8Y
Jun 01, 2009 DIST-A 70 100 0.8 0.8Y
May 01, 2009 DIST-A 90 96 0.77 0.8Y
Apr 01, 2009 DIST-A 90 96 0.78 0.8Y
Mar 01, 2009 DIST-A 90 119 0.8 0.8Y
Feb 01, 2009 DIST-A 90 95 0.75 0.8Y
Jan 01, 2009 DIST-A 90 95 0.8 0.8Y
Dec 01, 2008 DIST-A 90 94 0.80 0.8Y
Nov 01, 2008 DIST-A 90 94 0.65 0.7Y
Oct 01, 2008 DIST-A 90 96 0.67 0.8Y
Sep 01, 2008 DIST-A 90 95 0.73 0.8Y
Aug 01, 2008 DIST-A 90 96 0.84 0.8Y
Jul 01, 2008 DIST-A 90 120 0.78 1Y
Jun 01, 2008 DIST-A 90 96 0.78 1Y
 



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