OHA Drinking Water Services
OR41
PWS ID: 00823 ---- SILVERTON, 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 10 10 0.9 0.7Y
Jan 01, 2026 DIST-A 10 10 0.8 0.7Y
Dec 01, 2025 DIST-A 10 10 0.8 0.7Y
Nov 01, 2025 DIST-A 10 10 0.8 0.7Y
Oct 01, 2025 DIST-A 10 10 0.8 0.7Y
Aug 01, 2025 DIST-A 10 10 0.58 0.6Y
Jul 01, 2025 DIST-A 10 10 0.45 0.6Y
Jun 01, 2025 DIST-A 10 10 0.55 0.6Y
May 01, 2025 DIST-A 10 10 0.62 0.7Y
Apr 01, 2025 DIST-A 10 10 0.7 0.7Y
Mar 01, 2025 DIST-A 10 10 0.7 0.7Y
Feb 01, 2025 DIST-A 10 10 0.7 0.7Y
Jan 01, 2025 DIST-A 10 10 0.73 0.7Y
Dec 01, 2024 DIST-A 10 10 0.86 0.7Y
Nov 01, 2024 DIST-A 10 10 0.6 0.6Y
Oct 01, 2024 DIST-A 10 10 0.81 0.7Y
Sep 01, 2024 DIST-A 10 10 0.4 0.6Y
Aug 01, 2024 DIST-A 10 10 0.5 0.7Y
Jul 01, 2024 DIST-A 10 10 0.5 0.7Y
Jun 01, 2024 DIST-A 10 10 0.7 0.7Y
May 01, 2024 DIST-A 10 10 0.63 0.7Y
Apr 01, 2024 DIST-A 10 10 0.7 0.7Y
Mar 01, 2024 DIST-A 10 10 0.74 0.7Y
Feb 01, 2024 DIST-A 10 10 0.7 0.7Y
Jan 01, 2024 DIST-A 10 10 0.8 0.7Y
Dec 01, 2023 DIST-A 10 10 0.7 0.7Y
Nov 01, 2023 DIST-A 10 10 0.7 0.7Y
Oct 01, 2023 DIST-A 10 10 0.58 0.7Y
Sep 01, 2023 DIST-A 10 10 0.7 0.7Y
Aug 01, 2023 DIST-A 10 10 0.6 0.7Y
Jul 01, 2023 DIST-A 10 10 0.81 0.7Y
Jun 01, 2023 DIST-A 10 10 0.7 0.7Y
May 01, 2023 DIST-A 10 10 0.6 0.7Y
Apr 01, 2023 DIST-A 10 10 0.76 0.7Y
Mar 01, 2023 DIST-A 10 10 0.56 0.6Y
Feb 01, 2023 DIST-A 10 10 0.7 0.6Y
Jan 01, 2023 DIST-A 10 10 0.63 0.7Y
Dec 01, 2022 DIST-A 10 10 0.6 0.7Y
Nov 01, 2022 DIST-A 10 10 0.6 0.7Y
Oct 01, 2022 DIST-A 10 10 0.7 0.7Y
Sep 01, 2022 DIST-A 10 10 0.72 0.7Y
Aug 01, 2022 DIST-A 10 10 0.7 0.7Y
Jul 01, 2022 DIST-A 10 10 0.68 0.7Y
Jun 01, 2022 DIST-A 10 10 0.6 0.7Y
May 01, 2022 DIST-A 10 10 0.6 0.7Y
Apr 01, 2022 DIST-A 10 10 0.68 0.7Y
Mar 01, 2022 DIST-A 10 10 0.51 0.7Y
Feb 01, 2022 DIST-A 10 10 0.80 0.7Y
Jan 01, 2022 DIST-A 10 10 0.7 0.7Y
Dec 01, 2021 DIST-A 10 10 0.7 0.7Y
Nov 01, 2021 DIST-A 10 9 0.68 0.7Y
Oct 01, 2021 DIST-A 10 10 0.9 0.7Y
Sep 01, 2021 DIST-A 10 10 0.51 0.7Y
Aug 01, 2021 DIST-A 10 10 0.61 0.7Y
Jul 01, 2021 DIST-A 10 9 0.72 0.7Y
Jun 01, 2021 DIST-A 10 10 0.70 0.7Y
May 01, 2021 DIST-A 10 10 0.8 0.7Y
Apr 01, 2021 DIST-A 10 10 0.8 0.7Y
Mar 01, 2021 DIST-A 10 10 0.87 0.6Y
Feb 01, 2021 DIST-A 10 10 0.7 0.6Y
Jan 01, 2021 DIST-A 10 10 0.7 0.6Y
Dec 01, 2020 DIST-A 10 10 0.66 0.6Y
Nov 01, 2020 DIST-A 10 10 0.6 0.6Y
Oct 01, 2020 DIST-A 10 10 0.59 0.6Y
Sep 01, 2020 DIST-A 10 9 0.6 0.6Y
Aug 01, 2020 DIST-A 10 10 0.58 0.6Y
Jul 01, 2020 DIST-A 10 10 0.57 0.6Y
Jun 01, 2020 DIST-A 10 10 0.6 0.7Y
May 01, 2020 DIST-A 10 10 0.6 0.7Y
Apr 01, 2020 DIST-A 10 10 0.7 0.7Y
Mar 01, 2020 DIST-A 10 10 0.7 0.7Y
Feb 01, 2020 DIST-A 10 10 0.7 0.7Y
Jan 01, 2020 DIST-A 10 10 0.7 0.7Y
Dec 01, 2019 DIST-A 10 10 0.7 0.7Y
Nov 01, 2019 DIST-A 10 9 0.62 0.7Y
Oct 01, 2019 DIST-A 10 10 0.6 0.7Y
Sep 01, 2019 DIST-A 10 10 0.69 0.7Y
Aug 01, 2019 DIST-A 10 10 0.6 0.7Y
Jul 01, 2019 DIST-A 10 10 0.6 0.7Y
Jun 01, 2019 DIST-A 10 10 0.7 0.7Y
May 01, 2019 DIST-A 10 10 0.8 0.7Y
Apr 01, 2019 DIST-A 10 10 0.70 0.7Y
Mar 01, 2019 DIST-A 10 10 0.79 0.7Y
Feb 01, 2019 DIST-A 10 10 0.7 0.7Y
Jan 01, 2019 DIST-A 10 10 0.7 0.7Y
Dec 01, 2018 DIST-A 10 10 0.77 0.7Y
Nov 01, 2018 DIST-A 10 19 0.67 0.7Y
Oct 01, 2018 DIST-A 10 10 0.70 0.7Y
Sep 01, 2018 DIST-A 10 10 0.7 0.7Y
Aug 01, 2018 DIST-A 10 10 0.7 0.7Y
Jul 01, 2018 DIST-A 10 10 0.7 0.7Y
Jun 01, 2018 DIST-A 10 10 0.6 0.7Y
May 01, 2018 DIST-A 10 10 0.61 0.7Y
Apr 01, 2018 DIST-A 10 10 0.67 0.7Y
Mar 01, 2018 DIST-A 10 10 0.73 0.7Y
Feb 01, 2018 DIST-A 10 10 0.7 0.7Y
Jan 01, 2018 DIST-A 10 10 0.7 0.7Y
Dec 01, 2017 DIST-A 10 10 0.8 0.7Y
Nov 01, 2017 DIST-A 10 10 0.7 0.7Y
Oct 01, 2017 DIST-A 10 10 0.7 0.7Y
Sep 01, 2017 DIST-A 10 10 0.74 0.7Y
Aug 01, 2017 DIST-A 10 10 0.59 0.8Y
Jul 01, 2017 DIST-A 10 10 0.7 0.8Y
Jun 01, 2017 DIST-A 10 10 0.9 0.8Y
May 01, 2017 DIST-A 10 10 0.9 0.8Y
Apr 01, 2017 DIST-A 10 10 0.7 0.7Y
Mar 01, 2017 DIST-A 10 10 0.7 0.7Y
Feb 01, 2017 DIST-A 10 10 0.73 0.7Y
Jan 01, 2017 DIST-A 10 10 0.81 0.7Y
Dec 01, 2016 DIST-A 10 10 0.80 0.7Y
Nov 01, 2016 DIST-A 10 10 0.7 0.7Y
Oct 01, 2016 DIST-A 10 9 0.7 0.7Y
Sep 01, 2016 DIST-A 10 10 0.9 0.7Y
Aug 01, 2016 DIST-A 10 10 0.8 0.7Y
Jul 01, 2016 DIST-A 10 10 0.83 0.7Y
Jun 01, 2016 DIST-A 10 10 0.7 0.7Y
May 01, 2016 DIST-A 10 10 0.60 0.7Y
Apr 01, 2016 DIST-A 10 10 0.6 0.7Y
Mar 01, 2016 DIST-A 10 10 0.67 0.7Y
Feb 01, 2016 DIST-A 10 10 0.6 0.7Y
Jan 01, 2016 DIST-A 10 10 0.65 0.7Y
Dec 01, 2015 DIST-A 10 10 0.7 0.7Y
Nov 01, 2015 DIST-A 10 10 0.60 0.7Y
Oct 01, 2015 DIST-A 10 10 0.8 0.7Y
Sep 01, 2015 DIST-A 10 10 0.7 0.7Y
Aug 01, 2015 DIST-A 10 10 0.7 0.7Y
Jul 01, 2015 DIST-A 10 10 0.6 0.7Y
Jun 01, 2015 DIST-A 10 10 0.7 0.7Y
May 01, 2015 DIST-A 10 10 0.7 0.7Y
Apr 01, 2015 DIST-A 10 10 0.7 0.7Y
Mar 01, 2015 DIST-A 10 10 0.7 0.7Y
Feb 01, 2015 DIST-A 10 10 0.7 0.7Y
Jan 01, 2015 DIST-A 10 10 0.6 0.7Y
Dec 01, 2014 DIST-A 10 10 0.7 0.7Y
Nov 01, 2014 DIST-A 10 10 0.77 0.7Y
Oct 01, 2014 DIST-A 10 10 0.67 0.7Y
Sep 01, 2014 DIST-A 10 10 0.69 0.7Y
Aug 01, 2014 DIST-A 10 10 0.76 0.7Y
Jul 01, 2014 DIST-A 10 10 0.8 0.7Y
Jun 01, 2014 DIST-A 10 10 0.7 0.7Y
May 01, 2014 DIST-A 10 10 0.7 0.7Y
Apr 01, 2014 DIST-A 10 10 0.7 0.7Y
Mar 01, 2014 DIST-A 10 9 0.8 0.7Y
Feb 01, 2014 DIST-A 10 10 0.7 0.7Y
Jan 01, 2014 DIST-A 10 10 0.7 0.7Y
Dec 01, 2013 DIST-A 10 10 0.7 0.7Y
Nov 01, 2013 DIST-A 10 10 0.8 0.7Y
Oct 01, 2013 DIST-A 10 10 0.82 0.7Y
Sep 01, 2013 DIST-A 10 10 0.76 0.7Y
Aug 01, 2013 DIST-A 10 10 0.6 0.7Y
Jul 01, 2013 DIST-A 10 10 0.69 0.7Y
Jun 01, 2013 DIST-A 10 10 0.71 0.7Y
May 01, 2013 DIST-A 10 10 0.77 0.7Y
Apr 01, 2013 DIST-A 10 10 0.69 0.7Y
Mar 01, 2013 DIST-A 10 10 0.7 0.7Y
Feb 01, 2013 DIST-A 10 10 0.7 0.7Y
Jan 01, 2013 DIST-A 10 10 0.76 0.7Y
Dec 01, 2012 DIST-A 10 10 0.72 0.7Y
Nov 01, 2012 DIST-A 10 10 0.7 0.7Y
Oct 01, 2012 DIST-A 10 10 0.66 0.7Y
Sep 01, 2012 DIST-A 10 10 0.6 0.7Y
Aug 01, 2012 DIST-A 10 10 0.6 0.7Y
Jul 01, 2012 DIST-A 10 9 0.59 0.7Y
Jun 01, 2012 DIST-A 10 10 0.7 0.7Y
May 01, 2012 DIST-A 10 10 0.6 0.7Y
Apr 01, 2012 DIST-A 10 10 0.6 0.7Y
Mar 01, 2012 DIST-A 10 10 0.69 0.7Y
Feb 01, 2012 DIST-A 10 10 0.7 0.7Y
Jan 01, 2012 DIST-A 10 10 0.7 0.7Y
Dec 01, 2011 DIST-A 10 10 0.8 0.7Y
Nov 01, 2011 DIST-A 10 10 0.7 0.7Y
Oct 01, 2011 DIST-A 10 10 0.6800 0.7Y
Sep 01, 2011 DIST-A 10 10 0.7160 0.8Y
Aug 01, 2011 DIST-A 10 10 0.7270 0.8Y
Jul 01, 2011 DIST-A 10 10 0.7010 0.7Y
Jun 01, 2011 DIST-A 10 0 0 0.7Y
May 01, 2011 DIST-A 10 0 0 0.7Y
Apr 01, 2011 DIST-A 10 10 0.7050 0.7Y
Mar 01, 2011 DIST-A 10 10 0.7040 0.7Y
Feb 01, 2011 DIST-A 10 10 0.7180 0.7Y
Jan 01, 2011 DIST-A 10 10 0.8 0.7Y
Dec 01, 2010 DIST-A 10 10 0.7 0.7Y
Nov 01, 2010 DIST-A 10 10 0.80 0.7Y
Oct 01, 2010 DIST-A 10 10 1 0.7Y
Sep 01, 2010 DIST-A 10 10 0.64 0.7Y
Aug 01, 2010 DIST-A 10 10 0.6 0.7Y
Jul 01, 2010 DIST-A 10 10 0.66 0.7Y
Jun 01, 2010 DIST-A 13 13 0.8 0.7Y
May 01, 2010 DIST-A 10 10 0.7 0.7Y
Apr 01, 2010 DIST-A 10 10 0.7 0.7Y
Mar 01, 2010 DIST-A 10 10 0.7 0.7Y
Feb 01, 2010 DIST-A 13 12 0.65 0.7Y
Jan 01, 2010 DIST-A 10 10 0.7 0.7Y
Dec 01, 2009 DIST-A 10 10 0.7 0.7Y
Nov 01, 2009 DIST-A 7 10 0.7 0.7Y
Oct 01, 2009 DIST-A 7 10 0.68 0.6Y
Sep 01, 2009 DIST-A 7 10 0.8 0.6Y
Aug 01, 2009 DIST-A 7 10 0.79 0.6Y
Jul 01, 2009 DIST-A 7 10 0.80 0.6Y
Jun 01, 2009 DIST-A 7 10 0.8 0.6Y
May 01, 2009 DIST-A 7 7 0.5Y
Apr 01, 2009 DIST-A 7 10 0.8 0.6Y
Mar 01, 2009 DIST-A 7 10 0.8 0.6Y
Feb 01, 2009 DIST-A 7 10 0.91 0.6Y
Jan 01, 2009 DIST-A 7 10 0.98 0.6Y
Dec 01, 2008 DIST-A 7 7 0.6Y
Nov 01, 2008 DIST-A 7 7 0.6Y
Oct 01, 2008 DIST-A 7 10 0.6 0.7Y
Sep 01, 2008 DIST-A 7 10 0.9 0.7Y
Aug 01, 2008 DIST-A 7 10 0.8 0.7Y
Jul 01, 2008 DIST-A 7 10 0.7 0.7Y
Jun 01, 2008 DIST-A 7 7 0.7Y
May 01, 2008 DIST-A 7 10 0.7 0.7Y
Apr 01, 2008 DIST-A 7 10 0.7 0.7Y
Mar 01, 2008 DIST-A 7 10 0.7 0.7Y
Feb 01, 2008 DIST-A 7 10 0.9 0.6Y
Jan 01, 2008 DIST-A 7 10 0.8 0.6Y
Dec 01, 2007 DIST-A 7 10 0.85 0.6Y
Nov 01, 2007 DIST-A 7 10 0.9 0.5Y
Oct 01, 2007 DIST-A 7 17 0.7 0.5Y
Sep 01, 2007 DIST-A 7 14 0.6 0.5Y
Aug 01, 2007 DIST-A 7 14 0.6 0.5Y
Jul 01, 2007 DIST-A 7 6 0.5 0.5Y
Jun 01, 2007 DIST-A 7 7 0.4 0.5Y
May 01, 2007 DIST-A 7 7 0.4 0.6Y
Apr 01, 2007 DIST-A 7 7 0.5 0.6Y
Mar 01, 2007 DIST-A 7 7 0.4 0.6Y
Feb 01, 2007 DIST-A 7 7 0.4 0.6Y
Jan 01, 2007 DIST-A 7 7 0.5 0.6Y
Dec 01, 2006 DIST-A 7 7 0.5 0.6Y
Nov 01, 2006 DIST-A 7 7 0.7 0.6Y
Oct 01, 2006 DIST-A 7 7 0.7 0.6Y
Sep 01, 2006 DIST-A 7 7 0.7 0.6Y
Aug 01, 2006 DIST-A 7 7 0.6 0.6Y
Jul 01, 2006 DIST-A 7 7 0.6 0.6Y
Jun 01, 2006 DIST-A 7 7 0.6 0.6Y
May 01, 2006 DIST-A 7 7 0.5 0.5Y
Apr 01, 2006 DIST-A 7 7 0.6 0.5Y
Mar 01, 2006 DIST-A 7 7 0.5 0.5Y
Feb 01, 2006 DIST-A 7 7 0.6 0.5Y
Jan 01, 2006 DIST-A 7 7 0.6 0.5Y
Dec 01, 2005 DIST-A 7 7 0.6 0.5Y
Nov 01, 2005 DIST-A 7 7 0.6 0.5Y
Oct 01, 2005 DIST-A 7 7 0.5 0.5Y
Sep 01, 2005 DIST-A 7 7 0.6 0.5Y
Aug 01, 2005 DIST-A 7 7 0.5 0.5Y
Jul 01, 2005 DIST-A 7 7 0.5 0.5Y
Jun 01, 2005 DIST-A 7 7 0.5 0.5Y
May 01, 2005 DIST-A 7 7 0.5 0.5Y
Apr 01, 2005 DIST-A 7 7 0.4 0.5Y
Mar 01, 2005 DIST-A 7 7 0.5 0.5Y
Feb 01, 2005 DIST-A 7 7 0.5 0.5Y
Jan 01, 2005 DIST-A 10 4 0.3 0.5Y
Dec 01, 2004 DIST-A 7 7 0.5 0.5Y
Nov 01, 2004 DIST-A 7 7 0.5 0.5Y
Oct 01, 2004 DIST-A 7 7 0.5 0.5Y
Sep 01, 2004 DIST-A 7 6 0.6 0.5Y