OHA Drinking Water Services
OR41
PWS ID: 93427 ---- COLUMBIA RIVER NITROGEN, LLC
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
Jul 01, 2025 DIST-A 1 1 1.98 1.3Y
Apr 01, 2025 DIST-A 1 1 1.27 1.1Y
Jan 01, 2025 DIST-A 1 1 1.49 1.8Y
Oct 01, 2024 DIST-A 1 1 0.58 2.9Y
Jul 01, 2024 DIST-A 1 1 0.93 3.2Y
Apr 01, 2024 DIST-A 1 1 4.3 3.2Y
Jan 01, 2024 DIST-A 1 1 5.9 2.2Y
Oct 01, 2023 DIST-A 1 1 1.6 1.3Y
Jul 01, 2023 DIST-A 1 1 1.01 1.2Y
Apr 01, 2023 DIST-A 1 1 0.27 1.5Y
Jan 01, 2023 DIST-A 1 1 2.27 2.0Y
Jul 01, 2022 DIST-A 1 1 2.03 1.5Y
Apr 01, 2022 DIST-A 1 1 1.59 1.1Y
Jan 01, 2022 DIST-A 1 1 1.14 1.1Y
Oct 01, 2021 DIST-A 1 1 1.13 1.0Y
Jul 01, 2021 DIST-A 1 1 0.62 1.2Y
Apr 01, 2021 DIST-A 1 1 1.45 1.4Y
Jan 01, 2021 DIST-A 1 1 0.9 1.3Y
Oct 01, 2020 DIST-A 1 1 1.83 1.4Y
Jul 01, 2020 DIST-A 1 1 1.57 1.2Y
Apr 01, 2020 DIST-A 1 1 0.95 1.1Y
Jan 01, 2020 DIST-A 1 1 1.25 1.1Y
Oct 01, 2019 DIST-A 1 1 1.2 1.0Y
Jul 01, 2019 DIST-A 1 1 1.15 0.9Y
Apr 01, 2019 DIST-A 1 1 0.85 0.8Y
Jan 01, 2019 DIST-A 1 1 0.81 0.7Y
Oct 01, 2018 DIST-A 1 1 0.98 0.6Y
Jul 01, 2018 DIST-A 1 1 0.7 0.7Y
Apr 01, 2018 DIST-A 1 1 0.26 0.7Y
Jan 01, 2018 DIST-A 1 1 0.5 0.7Y
Oct 01, 2017 DIST-A 1 1 1.2 0.7Y
Jul 01, 2017 DIST-A 1 1 0.64 0.6Y
Apr 01, 2017 DIST-A 1 1 0.65 0.6Y
Jan 01, 2017 DIST-A 1 1 0.35 0.8Y
Oct 01, 2016 DIST-A 1 1 0.75 1.2Y
Jul 01, 2016 DIST-A 1 1 0.67 1.3Y
Apr 01, 2016 DIST-A 1 1 1.3 1.3Y
Jan 01, 2016 DIST-A 1 1 1.91 1.3Y
Oct 01, 2015 DIST-A 1 1 1.4 1.2Y
Jul 01, 2015 DIST-A 1 1 0.42 0.9Y
Apr 01, 2015 DIST-A 1 1 1.51 1.0Y
Jan 01, 2015 DIST-A 1 1 1.3 0.8Y
Oct 01, 2014 DIST-A 1 1 0.29 0.5Y
Jul 01, 2014 DIST-A 1 1 0.73 0.7Y
Apr 01, 2013 DIST-A 1 1 0.2 0.5Y
Oct 01, 2012 DIST-A 1 1 1.2 0.8Y
Jul 01, 2012 DIST-A 1 1 0.1 1.0Y
Apr 01, 2012 DIST-A 1 1 1.7000 1.4Y
Jan 01, 2012 DIST-A 1 1 0.3000 1.4Y
Oct 01, 2011 DIST-A 1 1 1.8000 1.8Y
Jul 01, 2011 DIST-A 1 1 1.7000 1.8Y
Apr 01, 2011 DIST-A 1 1 1.7000 1.8Y
Jan 01, 2011 DIST-A 1 1 2.0000 1.9Y
Oct 01, 2010 DIST-A 1 1 1.7000 1.6Y
Jul 01, 2010 DIST-A 1 1 2.0000 1.4Y
Jan 01, 2010 DIST-A 1 1 1.0000 1.2Y
Oct 01, 2009 DIST-A 1 1 1.2000 1.2Y
Jul 01, 2009 DIST-A 1 1 1.1800 1Y
Apr 01, 2009 DIST-A 1 1 1.5000 1Y
Jan 01, 2009 DIST-A 1 1 0.9000 2Y
Oct 01, 2008 DIST-A 1 1 1.5000 2Y
Jul 01, 2008 DIST-A 1 1 0.9000 2Y
Apr 01, 2008 DIST-A 1 1 3.0000 2Y
Jan 01, 2008 DIST-A 1 1 1.8000 2Y
Oct 01, 2007 DIST-A 1 1 2.0000 2Y
Jul 01, 2007 DIST-A 1 1 3.0000 1Y
Apr 01, 2007 DIST-A 1 2 0.2000 1Y
Jan 01, 2007 DIST-A 1 1 1.7000 1Y
Oct 01, 2006 DIST-A 1 1 0.9000 1Y
Jul 01, 2006 DIST-A 1 0 1Y
Apr 01, 2006 DIST-A 1 1 1.0000 1Y
Jan 01, 2006 DIST-A 1 1 1.5000 1Y
Dec 01, 2005 DIST-A 5 0 1Y
Oct 01, 2005 DIST-A 5 1 1.0000 1Y
Jul 01, 2005 DIST-A 1 2 1.8000 2Y
Apr 01, 2005 DIST-A 1 0 2Y
Jan 01, 2005 DIST-A 1 1 0.2000 2Y
Oct 01, 2004 DIST-A 1 1 2.5000 2Y
 



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