OHA Drinking Water Services
OR41
PWS ID: 95027 ---- COLUMBIA GORGE DISCOVERY CENTER
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, 2024 DIST-A 1 2 1.19 0.9Y
Oct 01, 2023 DIST-A 1 3 0.76 0.8Y
Jul 01, 2023 DIST-A 1 3 0.5 0.9Y
Apr 01, 2023 DIST-A 1 3 1.0 0.9Y
Jan 01, 2023 DIST-A 1 3 0.97 0.8Y
Oct 01, 2022 DIST-A 1 3 1.01 0.8Y
Jul 01, 2022 DIST-A 1 3 0.5 0.6Y
Apr 01, 2022 DIST-A 1 3 0.69 0.6Y
Jan 01, 2022 DIST-A 1 3 0.85 0.7Y
Oct 01, 2021 DIST-A 1 3 0.49 0.7Y
Jul 01, 2021 DIST-A 1 3 0.5 0.7Y
Apr 01, 2021 DIST-A 1 3 0.8 0.8Y
Jan 01, 2021 DIST-A 1 3 0.91 0.7Y
Oct 01, 2020 DIST-A 1 3 0.78 0.7Y
Jul 01, 2020 DIST-A 1 3 0.6 0.6Y
Apr 01, 2020 DIST-A 1 3 0.54 0.6Y
Jan 01, 2020 DIST-A 1 3 0.76 0.7Y
Oct 01, 2019 DIST-A 1 3 0.60 0.7Y
Jul 01, 2019 DIST-A 1 3 0.67 0.7Y
Apr 01, 2019 DIST-A 1 3 0.67 0.6Y
Jan 01, 2019 DIST-A 1 3 0.79 0.7Y
Oct 01, 2018 DIST-A 1 3 0.53 0.7Y
Jul 01, 2018 DIST-A 1 3 0.47 0.7Y
Apr 01, 2018 DIST-A 1 2 0.9 0.7Y
Jan 01, 2018 DIST-A 1 3 0.86 0.6Y
Oct 01, 2017 DIST-A 1 3 0.54 0.5Y
Jul 01, 2017 DIST-A 1 3 0.35 0.4Y
Apr 01, 2017 DIST-A 1 3 0.58 0.4Y
Jan 01, 2017 DIST-A 1 3 0.46 0.4Y
Oct 01, 2016 DIST-A 1 3 0.39 0.4Y
Jul 01, 2016 DIST-A 1 3 0.23 0.4Y
Apr 01, 2016 DIST-A 1 3 0.36 0.4Y
Jan 01, 2016 DIST-A 1 3 0.56 0.4Y
Oct 01, 2015 DIST-A 1 3 0.53 0.4Y
Jul 01, 2015 DIST-A 1 3 0.29 0.4Y
Apr 01, 2015 DIST-A 1 3 0.36 0.4Y
Jan 01, 2015 DIST-A 1 3 0.59 0.4Y
Oct 01, 2014 DIST-A 1 3 0.2 0.4Y
Jul 01, 2014 DIST-A 1 3 0.5 0.5Y
Apr 01, 2014 DIST-A 1 3 0.4 0.5Y
Jan 01, 2014 DIST-A 1 3 0.52 0.5Y
Oct 01, 2013 DIST-A 1 3 0.4 0.5Y
Jul 01, 2013 DIST-A 1 3 0.59 0.5Y
Apr 01, 2013 DIST-A 1 1 0.54 0.5Y
Jan 01, 2013 DIST-A 1 3 0.57 0.5Y
Oct 01, 2012 DIST-A 1 3 0.5 0.5Y
Jul 01, 2012 DIST-A 1 2 0.43 0.5Y
Apr 01, 2012 DIST-A 1 3 0.5400 0.5Y
Jan 01, 2012 DIST-A 1 3 0.6667 0.5Y
Oct 01, 2011 DIST-A 1 3 0.4633 0.5Y
Jul 01, 2011 DIST-A 1 2 0.4450 0.5Y
Apr 01, 2011 DIST-A 1 3 0.4967 0.5Y
Jan 01, 2011 DIST-A 1 3 0.7867 0.5Y
Oct 01, 2010 DIST-A 1 3 0.3800 0.5Y
Jul 01, 2010 DIST-A 1 3 0.3533 0.5Y
Apr 01, 2010 DIST-A 1 3 0.5367 0.6Y
Jan 01, 2010 DIST-A 1 3 0.8333 0.5Y
Oct 01, 2009 DIST-A 1 3 0.4667 0Y
Jul 01, 2009 DIST-A 1 3 0.4400 0Y
Apr 01, 2009 DIST-A 1 3 0.3633 0Y
Jan 01, 2009 DIST-A 1 3 0.5233 1Y
Oct 01, 2008 DIST-A 1 3 0.5067 1Y
Jul 01, 2008 DIST-A 1 3 0.3800 1Y
Apr 01, 2008 DIST-A 1 1 0.8700 1Y
Jan 01, 2008 DIST-A 1 1 0.2900 0Y
Oct 01, 2007 DIST-A 1 0 0Y
Jul 01, 2007 DIST-A 1 0 0Y
 




More information for this water system: SDWIS ID 4425
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  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA
Corrosion Control has moved to the Lead & Copper page.

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  ::  Certification List

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

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