OHA Drinking Water Services
OR41
PWS ID: 90872 ---- NORTHWEST ALUMINUM COMPANY ---- INACTIVE
Coliform Summary History

Note: Samples for a given monitoring period are due 10 days after period end date. Therefore the most recent monitoring periods may show zero samples reported. This does not mean the water system is out of compliance.

Number of Samples Reported
Abbreviations: TC+: Total Coliform Positive, EC+: E. Coli Positive
Exclude results older than 2021
Period End Date Routines Required Routines Reported Routine TC+ Routine EC+ Repeats Reported Repeat TC+ Repeat EC+ Period Type
Feb 28, 2021 1 000000MN
Jan 31, 2021 1 000000MN
Dec 31, 2020 1 100000MN
Nov 30, 2020 1 111310MN
Oct 31, 2020 1 100000MN
Sep 30, 2020 1 110330MN
Aug 31, 2020 1 100000MN
Jul 31, 2020 1 100000MN
Jun 30, 2020 1 100000MN
May 31, 2020 1 100000MN
Apr 30, 2020 1 100000MN
Mar 31, 2020 1 100000MN
Feb 29, 2020 1 100000MN
Jan 31, 2020 1 100000MN
Dec 31, 2019 1 100000MN
Nov 30, 2019 1 100000MN
Oct 31, 2019 1 110320MN
Sep 30, 2019 1 100000MN
Aug 31, 2019 1 110320MN
Jul 31, 2019 1 110330MN
Jun 30, 2019 1 100000MN
May 31, 2019 1 100000MN
Apr 30, 2019 1 100000MN
Mar 31, 2019 1 100000MN
Feb 28, 2019 1 100000MN
Jan 31, 2019 1 110300MN
Dec 31, 2018 1 100000MN
Nov 30, 2018 1 110320MN
Oct 31, 2018 1 110330MN
Sep 30, 2018 3 300000MN
Aug 31, 2018 3 330000MN
Jul 31, 2018 3 330530MN
Jun 30, 2018 1 110630QT
Mar 31, 2018 1 100000QT
Dec 31, 2017 1 100000QT
Sep 30, 2017 1 100000QT
Jun 30, 2017 1 100000QT
Mar 31, 2017 1 100000QT
Dec 31, 2016 1 100000QT
Sep 30, 2016 1 100000QT
Jun 30, 2016 1 100000QT
Jan 31, 2016 5 500000MN
Dec 31, 2015 1 310100QT
Sep 30, 2015 1 100000QT
Jun 30, 2015 1 100000QT
Mar 31, 2015 1 100000QT
Dec 31, 2014 1 100000QT
Sep 30, 2014 1 100000QT
Jun 30, 2014 1 100000QT
Mar 31, 2014 1 100000QT
Nov 30, 2013 5 500000MN
Oct 31, 2013 5 510000MN
Sep 30, 2013 1 210310QT
Jun 30, 2013 1 100000QT
Mar 31, 2013 1 100000QT
Dec 31, 2012 1 100000QT
Sep 30, 2012 1 100000QT
Jun 30, 2012 1 100000QT
Mar 31, 2012 1 100000QT
Dec 31, 2011 1 100000QT
Jul 31, 2011 5 000710MN
Jun 30, 2011 1 110000QT
Jan 31, 2011 5 310300MN
Dec 31, 2010 1 110630QT
Sep 30, 2010 1 100000QT
Jun 30, 2010 1 100000QT
Mar 31, 2010 5 400000MN
Jan 31, 2010 5 000440MN
Dec 31, 2009 5 410000MN
Nov 30, 2009 5 110000MN
Aug 31, 2009 5 000000MN
Jun 30, 2009 1 100000QT
Jan 31, 2009 5 500000MN
Oct 31, 2008 5 500000MN
Sep 30, 2008 5 520000MN
Jun 30, 2008 1 000000QT
Mar 31, 2008 1 100000QT
Dec 31, 2007 1 100000QT
Sep 30, 2007 1 100000QT
Jun 30, 2007 1 100000QT
Feb 28, 2007 5 500000MN
Dec 31, 2006 1 100000QT
Sep 30, 2006 1 100000QT
Jun 30, 2006 1 100000QT
Mar 31, 2006 1 100000QT
Oct 31, 2005 5 500000MN
Sep 30, 2005 5 520410MN
Jun 30, 2005 1 100000QT
Mar 31, 2005 1 100000QT
Dec 31, 2004 1 100000QT
Sep 30, 2004 1 100000QT
Jun 30, 2004 1 100000QT
Feb 29, 2004 5 500000MN
Dec 31, 2003 5 500000MN
Nov 30, 2003 5 530000MN
Oct 31, 2003 5 630420MN
Sep 30, 2003 1 110000QT
Jun 30, 2003 1 100000QT
Mar 31, 2003 1 100000QT
Dec 31, 2002 1 100000QT
Sep 30, 2002 1 100000QT
May 31, 2002 5 000000MN
Feb 28, 2002 5 100000MN
Exclude results older than 2021


More information for this water system: SDWIS ID 799
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