OHA Drinking Water Services
OR41
PWS ID: 95468 ---- COLUMBIA PACIFIC BIO-REFINERY
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
Jan 01, 2026 DIST-A 1 1 0.26 0.3Y
Oct 01, 2025 DIST-A 1 1 0.27 0.3Y
Jul 01, 2025 DIST-A 1 1 0.31 0.3Y
Apr 01, 2025 DIST-A 1 1 0.22 0.3Y
Jan 01, 2025 DIST-A 1 1 0.41 0.3Y
Oct 01, 2024 DIST-A 1 1 0.22 0.2Y
Jan 01, 2017 DIST-A 1 2 0.27 0.5Y
Dec 01, 2016 DIST-A 1 1 0.56 0.6Y
Nov 01, 2016 DIST-A 1 1 0.54 0.6Y
Oct 01, 2016 DIST-A 1 1 0.55 0.6Y
Sep 01, 2016 DIST-A 1 0 0.6Y
Aug 01, 2016 DIST-A 1 1 0.31 0.6Y
Jul 01, 2016 DIST-A 1 1 0.45 0.6Y
Jun 01, 2016 DIST-A 1 1 0.28 0.6Y
May 01, 2016 DIST-A 1 1 0.34 0.7Y
Apr 01, 2016 DIST-A 1 1 0.6 0.7Y
Mar 01, 2016 DIST-A 1 1 0.98 0.7Y
Feb 01, 2016 DIST-A 1 1 0.76 0.7Y
Jan 01, 2016 DIST-A 1 1 0.96 0.7Y
Dec 01, 2015 DIST-A 1 1 0.68 0.6Y
Nov 01, 2015 DIST-A 1 1 0.49 0.6Y
Oct 01, 2015 DIST-A 1 1 0.69 0.6Y
Sep 01, 2015 DIST-A 1 1 0.64 0.6Y
Aug 01, 2015 DIST-A 1 1 0.63 0.6Y
Jul 01, 2015 DIST-A 1 1 0.71 0.6Y
Jun 01, 2015 DIST-A 1 1 0.78 0.5Y
May 01, 2015 DIST-A 1 1 0.71 0.5Y
Apr 01, 2015 DIST-A 1 0 0.4Y
Mar 01, 2015 DIST-A 1 1 0.43 0.4Y
Feb 01, 2015 DIST-A 1 1 0.67 0.4Y
Jan 01, 2015 DIST-A 1 1 0.51 0.4Y
Dec 01, 2014 DIST-A 1 1 0.86 0.3Y
Nov 01, 2014 DIST-A 1 1 0.46 0.3Y
Oct 01, 2014 DIST-A 1 1 0.31 0.3Y
Sep 01, 2014 DIST-A 1 1 0.44 0.3Y
Aug 01, 2014 DIST-A 1 1 0.35 0.3Y
Jul 01, 2014 DIST-A 1 1 0.09 0.2Y
Jun 01, 2014 DIST-A 1 1 0.14 0.3Y
May 01, 2014 DIST-A 1 1 0.31 0.3Y
Apr 01, 2014 DIST-A 1 1 0.32 0.3Y
Mar 01, 2014 DIST-A 5 1 0.26 0.3Y
Feb 01, 2014 DIST-A 5 6 0.4 0.3Y
Jan 01, 2014 DIST-A 1 1 0.13 0.4Y
Dec 01, 2013 DIST-A 1 1 0.23 0.4Y
Nov 01, 2013 DIST-A 1 1 0.15 0.5Y
Oct 01, 2013 DIST-A 1 1 0.44 0.6Y
Sep 01, 2013 DIST-A 1 0 0.6Y
Aug 01, 2013 DIST-A 1 0 0.7Y
Jul 01, 2013 DIST-A 1 1 0.17 0.7Y
Jun 01, 2013 DIST-A 1 0 0.7Y
May 01, 2013 DIST-A 1 1 0.41 0.8Y
Apr 01, 2013 DIST-A 1 1 0.21 0.8Y
Mar 01, 2013 DIST-A 1 1 0.72 1.0Y
Feb 01, 2013 DIST-A 1 1 1.2 1.0Y
Jan 01, 2013 DIST-A 1 1 0.24 1.0Y
Dec 01, 2012 DIST-A 1 1 1.1 1.1Y
Nov 01, 2012 DIST-A 1 1 1.1 1.0Y
Oct 01, 2012 DIST-A 1 1 0.43 1.0Y
Sep 01, 2012 DIST-A 1 1 1.12 1.1Y
Aug 01, 2012 DIST-A 1 1 0.81 1.1Y
Jul 01, 2012 DIST-A 1 1 0.43 1.2Y
Jun 01, 2012 DIST-A 1 1 1.88 1.4Y
May 01, 2012 DIST-A 1 1 0.54 1.2Y
Apr 01, 2012 DIST-A 5 4 2.3 1.6Y
Mar 01, 2012 DIST-A 5 3 0.87 0.9Y