OHA Drinking Water Services
OR41
PWS ID: 91998 ---- NPS OREGON CAVES NATL MON
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, 2024 DIST-A 1 2 1.5 1.2Y
Jan 01, 2024 DIST-A 1 1 0.89 1.2Y
Dec 01, 2023 DIST-A 1 2 1.3 1.2Y
Nov 01, 2023 DIST-A 1 2 1.4 1.2Y
Oct 01, 2023 DIST-A 1 2 1.5 1.1Y
Sep 01, 2023 DIST-A 1 2 1.5 1.1Y
Aug 01, 2023 DIST-A 1 2 1.5 1.1Y
Jul 01, 2023 DIST-A 1 2 1 1.1Y
Jun 01, 2023 DIST-A 1 2 1 1.1Y
May 01, 2023 DIST-A 1 2 1.5 1.1Y
Apr 01, 2023 DIST-A 1 2 0.9 1.0Y
Mar 01, 2023 DIST-A 4 1 1 1.1Y
Feb 01, 2023 DIST-A 1 2 1 1.1Y
Jan 01, 2023 DIST-A 1 2 1 1.1Y
Dec 01, 2022 DIST-A 1 1 0.5 1.2Y
Nov 01, 2022 DIST-A 1 2 1.26 1.2Y
Oct 01, 2022 DIST-A 1 2 1 1.2Y
Sep 01, 2022 DIST-A 1 2 1.4 1.2Y
Aug 01, 2022 DIST-A 1 2 1.4 1.2Y
Jul 01, 2022 DIST-A 1 2 0.98 1.2Y
Jun 01, 2022 DIST-A 1 2 1 1.2Y
May 01, 2022 DIST-A 1 2 1.0 1.2Y
Apr 01, 2022 DIST-A 1 2 1.3 1.2Y
Mar 01, 2022 DIST-A 1 2 1.6 1.2Y
Feb 01, 2022 DIST-A 1 2 1 1.1Y
Jan 01, 2022 DIST-A 1 2 1.7 1.1Y
Dec 01, 2021 DIST-A 1 2 1 1.0Y
Nov 01, 2021 DIST-A 1 2 0.9 1.0Y
Oct 01, 2021 DIST-A 1 2 0.9 1.0Y
Sep 01, 2021 DIST-A 1 2 1 1.0Y
Aug 01, 2021 DIST-A 1 2 2 0.9Y
Jul 01, 2021 DIST-A 1 2 1.5 0.8Y
Jun 01, 2021 DIST-A 1 2 0.8 0.7Y
May 01, 2021 DIST-A 1 2 0.55 0.7Y
Apr 01, 2021 DIST-A 1 2 0.8 0.7Y
Mar 01, 2021 DIST-A 1 2 1 0.8Y
Feb 01, 2021 DIST-A 1 2 1.1 0.8Y
Jan 01, 2021 DIST-A 1 2 0.5 0.7Y
Dec 01, 2020 DIST-A 1 2 0.5 0.7Y
Nov 01, 2020 DIST-A 1 2 1.0 0.8Y
Oct 01, 2020 DIST-A 1 2 1 0.8Y
Sep 01, 2020 DIST-A 1 1 0.5 0.8Y
Aug 01, 2020 DIST-A 1 2 0.5 0.8Y
Jul 01, 2020 DIST-A 1 2 0.5 0.8Y
Jun 01, 2020 DIST-A 1 3 0.5 0.9Y
May 01, 2020 DIST-A 1 2 1 0.9Y
Apr 01, 2020 DIST-A 1 2 1 0.9Y
Mar 01, 2020 DIST-A 1 1 1 0.9Y
Feb 01, 2020 DIST-A 1 2 0.5 0.9Y
Jan 01, 2020 DIST-A 1 2 0.7 1.0Y
Dec 01, 2019 DIST-A 1 2 1 1.0Y
Nov 01, 2019 DIST-A 1 2 1 1.0Y
Oct 01, 2019 DIST-A 1 2 1 1.1Y
Sep 01, 2019 DIST-A 1 2 0.6 1.1Y
Aug 01, 2019 DIST-A 1 2 1.0 1.2Y
Jul 01, 2019 DIST-A 1 2 1 1.3Y
Jun 01, 2019 DIST-A 1 2 0.9 1.3Y
May 01, 2019 DIST-A 1 2 1 1.3Y
Apr 01, 2019 DIST-A 1 2 1 1.3Y
Mar 01, 2019 DIST-A 1 2 1.6 1.3Y
Feb 01, 2019 DIST-A 1 2 1.2 1.3Y
Jan 01, 2019 DIST-A 1 2 1 1.2Y
Dec 01, 2018 DIST-A 1 2 1.2 1.2Y
Nov 01, 2018 DIST-A 1 2 1.5 1.2Y
Oct 01, 2018 DIST-A 1 2 1.6 1.3Y
Sep 01, 2018 DIST-A 1 2 1.6 1.3Y
Aug 01, 2018 DIST-A 1 2 1.7 1.2Y
Jul 01, 2018 DIST-A 1 2 1 1.2Y
Jun 01, 2018 DIST-A 1 2 1.0 1.2Y
May 01, 2018 DIST-A 1 2 1.0 1.2Y
Apr 01, 2018 DIST-A 1 2 1 1.2Y
Mar 01, 2018 DIST-A 1 2 1.3 1.2Y
Feb 01, 2018 DIST-A 1 2 1 1.1Y
Jan 01, 2018 DIST-A 1 2 0.8 1.1Y
Dec 01, 2017 DIST-A 1 2 1.0 1.1Y
Nov 01, 2017 DIST-A 1 2 2 1.1Y
Oct 01, 2017 DIST-A 1 2 1.6 1.0Y
Sep 01, 2017 DIST-A 1 2 1.3 1.0Y
Aug 01, 2017 DIST-A 1 2 1.6 0.9Y
Jul 01, 2017 DIST-A 1 2 1.1 0.9Y
Jun 01, 2017 DIST-A 1 2 0.5 0.9Y
May 01, 2017 DIST-A 1 2 0.6 0.9Y
Apr 01, 2017 DIST-A 1 2 1 0.9Y
Mar 01, 2017 DIST-A 1 2 1 0.8Y
Feb 01, 2017 DIST-A 1 2 1 0.8Y
Jan 01, 2017 DIST-A 1 2 0.9 0.7Y
Dec 01, 2016 DIST-A 1 2 1.1 0.8Y
Nov 01, 2016 DIST-A 1 2 0.7 0.7Y
Oct 01, 2016 DIST-A 1 2 1 0.7Y
Sep 01, 2016 DIST-A 1 2 0.7 0.7Y
Aug 01, 2016 DIST-A 1 2 0.7 0.7Y
Jul 01, 2016 DIST-A 1 2 1 0.6Y
Jun 01, 2016 DIST-A 1 3 0.5 0.6Y
May 01, 2016 DIST-A 1 2 0.7 0.6Y
Apr 01, 2016 DIST-A 1 2 0.7 0.6Y
Mar 01, 2016 DIST-A 1 2 0.4 0.5Y
Feb 01, 2016 DIST-A 1 2 0.42 0.5Y
Jan 01, 2016 DIST-A 1 2 1.11 0.6Y
Dec 01, 2015 DIST-A 1 0 0.5Y
Nov 01, 2015 DIST-A 1 2 0.53 0.5Y
Oct 01, 2015 DIST-A 1 2 0.61 0.5Y
Sep 01, 2015 DIST-A 1 2 0.5 0.5Y
Aug 01, 2015 DIST-A 1 2 0.6 0.5Y
Jul 01, 2015 DIST-A 1 2 0.42 0.5Y
Jun 01, 2015 DIST-A 1 2 0.37 0.5Y
May 01, 2015 DIST-A 1 2 0.48 0.5Y
Apr 01, 2015 DIST-A 1 2 0.58 0.5Y
Mar 01, 2015 DIST-A 1 2 0.4 0.5Y
Feb 01, 2015 DIST-A 1 3 0.6 0.5Y
Jan 01, 2015 DIST-A 1 2 0.52 0.5Y
Dec 01, 2014 DIST-A 1 2 0.4 0.5Y
Nov 01, 2014 DIST-A 1 1 0.5 0.5Y
Oct 01, 2014 DIST-A 1 2 0.7 0.5Y
Sep 01, 2014 DIST-A 1 1 0.54 0.5Y
Aug 01, 2014 DIST-A 1 1 0.45 0.5Y
Jul 01, 2014 DIST-A 1 1 0.4 0.5Y
Jun 01, 2014 DIST-A 1 2 0.5 0.6Y
May 01, 2014 DIST-A 1 2 0.6 0.6Y
Apr 01, 2014 DIST-A 1 2 0.4 0.6Y
Mar 01, 2014 DIST-A 1 2 0.4 0.6Y
Feb 01, 2014 DIST-A 1 2 0.5 0.6Y
Jan 01, 2014 DIST-A 1 2 0.5 0.6Y
Dec 01, 2013 DIST-A 1 2 0.6 0.6Y
Nov 01, 2013 DIST-A 1 2 0.6 0.6Y
Oct 01, 2013 DIST-A 1 1 0.5 0.6Y
Sep 01, 2013 DIST-A 1 2 0.6 0.7Y
Aug 01, 2013 DIST-A 1 2 0.8 0.7Y
Jul 01, 2013 DIST-A 1 2 0.7 0.7Y
Jun 01, 2013 DIST-A 1 2 0.7 0.6Y
May 01, 2013 DIST-A 1 2 0.5 0.6Y
Apr 01, 2013 DIST-A 1 2 0.6 0.6Y
Mar 01, 2013 DIST-A 1 2 0.7 0.6Y
Feb 01, 2013 DIST-A 1 2 0.6 0.6Y
Jan 01, 2013 DIST-A 1 2 0.7 0.6Y
Dec 01, 2012 DIST-A 1 2 0.7 0.6Y
Nov 01, 2012 DIST-A 1 2 0.6 0.6Y
Oct 01, 2012 DIST-A 1 2 0.7 0.6Y
Sep 01, 2012 DIST-A 1 2 0.7 0.6Y
Aug 01, 2012 DIST-A 1 2 0.6 0.6Y
Jul 01, 2012 DIST-A 1 2 0.6 0.6Y
Jun 01, 2012 DIST-A 1 2 0.4 0.6Y
May 01, 2012 DIST-A 1 2 0.5 0.6Y
Apr 01, 2012 DIST-A 1 2 0.7 0.6Y
Mar 01, 2012 DIST-A 1 2 0.6 0.6Y
Feb 01, 2012 DIST-A 1 2 0.5 0.6Y
Jan 01, 2012 DIST-A 1 2 0.5 0.6Y
Dec 01, 2011 DIST-A 1 2 0.6 0.6Y
Nov 01, 2011 DIST-A 1 2 0.8 0.6Y
Oct 01, 2011 DIST-A 1 2 0.5500 0.6Y
Sep 01, 2011 DIST-A 1 2 0.7500 0.6Y
Aug 01, 2011 DIST-A 1 2 0.7500 0.6Y
Jul 01, 2011 DIST-A 1 2 0.3500 0.6Y
Jun 01, 2011 DIST-A 1 2 0.6 0.6Y
May 01, 2011 DIST-A 1 2 0.5000 0.6Y
Apr 01, 2011 DIST-A 1 2 0.6250 0.6Y
Mar 01, 2011 DIST-A 1 2 0.7500 0.6Y
Feb 01, 2011 DIST-A 1 2 0.5500 0.6Y
Jan 01, 2011 DIST-A 1 2 0.7000 0.6Y
Dec 01, 2010 DIST-A 1 2 0.6 0.6Y
Nov 01, 2010 DIST-A 1 2 0.4 0.6Y
Oct 01, 2010 DIST-A 1 2 0.7 0.6Y
Sep 01, 2010 DIST-A 1 2 0.5 0.6Y
Aug 01, 2010 DIST-A 1 2 0.7 0.6Y
Jul 01, 2010 DIST-A 1 2 0.6 0.5Y
Jun 01, 2010 DIST-A 1 2 0.6 0.5Y
May 01, 2010 DIST-A 1 2 0.5 0.5Y
Apr 01, 2010 DIST-A 1 2 0.6 0.5Y
Mar 01, 2010 DIST-A 1 2 0.6 0.5Y
Feb 01, 2010 DIST-A 1 2 0.5 0.5Y
Jan 01, 2010 DIST-A 1 2 0.6 0.5Y
Dec 01, 2009 DIST-A 1 2 0.6 0.5Y
Nov 01, 2009 DIST-A 1 2 0.4 0.4Y
Oct 01, 2009 DIST-A 1 2 0.5 0.4Y
Sep 01, 2009 DIST-A 1 2 0.6 0.4Y
Aug 01, 2009 DIST-A 1 1 0.4Y
Jul 01, 2009 DIST-A 1 3 0.8 0.5Y
Jun 01, 2009 DIST-A 1 2 0.5 0.4Y
May 01, 2009 DIST-A 1 1 0.4Y
Apr 01, 2009 DIST-A 1 2 0.5 0.5Y
Mar 01, 2009 DIST-A 1 2 0.6 0.5Y
Feb 01, 2009 DIST-A 1 2 0.5 0.5Y
Jan 01, 2009 DIST-A 1 2 0.6 0.5Y
Dec 01, 2008 DIST-A 1 1 0.5Y
Nov 01, 2008 DIST-A 1 3 0.4 0.6Y
Oct 01, 2008 DIST-A 1 2 0.7 0.6Y
Sep 01, 2008 DIST-A 1 2 0.5 0.6Y
Aug 01, 2008 DIST-A 1 2 0.4 0.6Y
Jul 01, 2008 DIST-A 1 2 0.7 0.6Y
Jun 01, 2008 DIST-A 1 2 0.5 0.6Y
May 01, 2008 DIST-A 1 2 0.5 0.6Y
Apr 01, 2008 DIST-A 1 2 0.6 0.6Y
Mar 01, 2008 DIST-A 1 2 0.6 0.6Y
Feb 01, 2008 DIST-A 1 2 0.6 0.7Y
Jan 01, 2008 DIST-A 1 2 0.6 0.7Y
Dec 01, 2007 DIST-A 1 2 0.5 0.7Y
Nov 01, 2007 DIST-A 1 2 0.6 0.7Y
Oct 01, 2007 DIST-A 1 2 0.7 0.6Y
Sep 01, 2007 DIST-A 1 1 0.7 0.6Y
Aug 01, 2007 DIST-A 1 2 0.8 0.6Y
Jul 01, 2007 DIST-A 1 2 0.7 0.6Y
Jun 01, 2007 DIST-A 1 2 0.6 0.6Y
May 01, 2007 DIST-A 1 2 0.5 0.6Y
Apr 01, 2007 DIST-A 1 2 0.8 0.6Y
Mar 01, 2007 DIST-A 1 2 0.8 0.6Y
Feb 01, 2007 DIST-A 1 2 0.7 0.6Y
Jan 01, 2007 DIST-A 1 2 0.5 0.6Y
Dec 01, 2006 DIST-A 1 2 0.5 0.6Y
Nov 01, 2006 DIST-A 1 2 0.5 0.6Y
Oct 01, 2006 DIST-A 1 1 0.6 0.6Y
Sep 01, 2006 DIST-A 1 2 0.6 0.6Y
Aug 01, 2006 DIST-A 1 2 0.7 0.6Y
Jul 01, 2006 DIST-A 1 2 0.5 0.6Y
Jun 01, 2006 DIST-A 1 2 0.7 0.6Y
May 01, 2006 DIST-A 1 2 0.5 0.6Y
Apr 01, 2006 DIST-A 1 2 0.8 0.6Y
Mar 01, 2006 DIST-A 1 2 0.7 0.6Y
Feb 01, 2006 DIST-A 1 2 0.5 0.6Y
Jan 01, 2006 DIST-A 1 2 0.5 0.6Y
Dec 01, 2005 DIST-A 1 2 0.6 0.6Y
Nov 01, 2005 DIST-A 1 2 0.6 0.6Y
Oct 01, 2005 DIST-A 1 2 0.6 0.6Y
Sep 01, 2005 DIST-A 1 2 0.7 0.6Y
Aug 01, 2005 DIST-A 1 2 0.7 0.6Y
Jul 01, 2005 DIST-A 1 2 0.6 0.6Y
Jun 01, 2005 DIST-A 1 2 0.7 0.6Y
May 01, 2005 DIST-A 1 2 0.5 0.6Y
Apr 01, 2005 DIST-A 1 2 0.5 0.6Y
Mar 01, 2005 DIST-A 1 2 0.6 0.7Y
Feb 01, 2005 DIST-A 1 2 0.6 0.7Y
Jan 01, 2005 DIST-A 1 2 0.6 0.7Y
Dec 01, 2004 DIST-A 1 2 0.6 0.7Y
Nov 01, 2004 DIST-A 1 2 0.6 0.7Y
Oct 01, 2004 DIST-A 1 2 0.8 0.7Y
Sep 01, 2004 DIST-A 1 2 0.8 0.7Y
 




More information for this water system: SDWIS ID 3151
System Info  ::  Report for Lenders  ::  Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Contacts & Advisories  ::  Site Visits  ::  Public Notice
Coliform Summary  ::  Coliform Results  ::  Coliform Schedules  ::  LT2  ::  GW/GWUDI Source Details  ::  Plan Review  ::  Annual Fee
Chemical Summary  ::  Chemical Results  ::  Chemical Schedules  ::  Chemical Schedule Summary  ::  Arsenic RAA  ::  Cyanotoxins  ::  PFAS
Lead & Copper  ::  Corrosion Control (LCR)  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA
Something missing? The new Chemical Results page replaces many pages, including arsenic and nitrate.

Information for all water systems:
Water System Inventory  ::  Water System Surveys  ::  Outstanding Performers  ::  Treatment Plant Inspections  ::  Treatment  ::  Plan Reviews
Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Deficiencies  ::  System Scores  ::  Exceedances  ::  Public Notices  ::  Service Lines
Water Advisories  ::  Contact Reports  ::  Cyanotoxins  ::  PFAS  ::  Post-wildfire VOCs  ::  Fluoride

Introduction  ::  Data Search Options  ::  Water System Search  ::  DWS Home  ::  DWS Rules

Need help? Email Drinking Water Services for assistance.Staff/Partner Login