OHA Drinking Water Services
OR41
PWS ID: 00937 ---- WELCHES WATER COMPANY
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
Mar 31, 2024 1 000000MN
Feb 29, 2024 1 100000MN
Jan 31, 2024 1 100000MN
Dec 31, 2023 1 100000MN
Nov 30, 2023 1 100000MN
Oct 31, 2023 1 100000MN
Sep 30, 2023 1 100000MN
Aug 31, 2023 1 100000MN
Jul 31, 2023 1 100000MN
Jun 30, 2023 1 100000MN
May 31, 2023 1 100000MN
Apr 30, 2023 1 100000MN
Mar 31, 2023 1 110300MN
Feb 28, 2023 1 100000MN
Jan 31, 2023 1 100000MN
Dec 31, 2022 1 100000MN
Nov 30, 2022 1 100000MN
Oct 31, 2022 1 100000MN
Sep 30, 2022 1 100000MN
Aug 31, 2022 1 100000MN
Jul 31, 2022 1 100000MN
Jun 30, 2022 1 100000MN
May 31, 2022 1 100000MN
Apr 30, 2022 1 100000MN
Mar 31, 2022 1 100000MN
Feb 28, 2022 1 100000MN
Jan 31, 2022 1 100000MN
Dec 31, 2021 1 100000MN
Nov 30, 2021 1 100000MN
Oct 31, 2021 1 100000MN
Sep 30, 2021 1 100000MN
Aug 31, 2021 1 100000MN
Jul 31, 2021 1 100000MN
Jun 30, 2021 1 100000MN
May 31, 2021 1 100000MN
Apr 30, 2021 1 100000MN
Mar 31, 2021 1 100000MN
Feb 28, 2021 1 100000MN
Jan 31, 2021 1 100000MN
Dec 31, 2020 1 100000MN
Nov 30, 2020 1 000000MN
Oct 31, 2020 1 200000MN
Sep 30, 2020 1 000000MN
Aug 31, 2020 1 100000MN
Jul 31, 2020 1 100000MN
Jun 30, 2020 1 100000MN
May 31, 2020 1 200000MN
Apr 30, 2020 1 000000MN
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 100000MN
Sep 30, 2019 1 100000MN
Aug 31, 2019 1 100000MN
Jul 31, 2019 1 100000MN
Jun 30, 2019 1 100000MN
May 31, 2019 1 100000MN
Apr 30, 2019 1 100000MN
Mar 31, 2019 1 100000MN
Feb 28, 2019 1 000000MN
Jan 31, 2019 1 100000MN
Dec 31, 2018 1 100000MN
Nov 30, 2018 1 100000MN
Oct 31, 2018 1 111300MN
Sep 30, 2018 1 100000MN
Aug 31, 2018 1 100000MN
Jul 31, 2018 1 100000MN
Jun 30, 2018 1 100000MN
May 31, 2018 1 100000MN
Apr 30, 2018 1 100000MN
Mar 31, 2018 1 100000MN
Feb 28, 2018 1 100000MN
Jan 31, 2018 1 100000MN
Dec 31, 2017 1 100000MN
Nov 30, 2017 1 100000MN
Oct 31, 2017 1 100000MN
Sep 30, 2017 1 100000MN
Aug 31, 2017 1 100000MN
Jul 31, 2017 1 100000MN
Jun 30, 2017 1 100000MN
May 31, 2017 1 100000MN
Apr 30, 2017 1 100000MN
Mar 31, 2017 1 100000MN
Feb 28, 2017 1 100000MN
Jan 31, 2017 1 100000MN
Dec 31, 2016 1 100000MN
Nov 30, 2016 1 100000MN
Oct 31, 2016 1 100000MN
Sep 30, 2016 1 100000MN
Aug 31, 2016 1 100000MN
Jul 31, 2016 1 100000MN
Jun 30, 2016 1 100000MN
May 31, 2016 1 100000MN
Apr 30, 2016 1 100000MN
Mar 31, 2016 5 500000MN
Feb 29, 2016 1 110410MN
Jan 31, 2016 1 100000MN
Dec 31, 2015 1 100000MN
Nov 30, 2015 1 100000MN
Oct 31, 2015 1 100000MN
Sep 30, 2015 1 100000MN
Aug 31, 2015 1 100000MN
Jul 31, 2015 1 100000MN
Jun 30, 2015 1 100000MN
May 31, 2015 1 100000MN
Apr 30, 2015 1 100000MN
Mar 31, 2015 1 100000MN
Feb 28, 2015 1 100000MN
Jan 31, 2015 1 100000MN
Dec 31, 2014 1 100000MN
Nov 30, 2014 5 500000MN
Oct 31, 2014 5 520000MN
Sep 30, 2014 5 530000MN
Aug 31, 2014 5 530000MN
Jul 31, 2014 1 110420MN
Jun 30, 2014 1 100000MN
May 31, 2014 1 100000MN
Apr 30, 2014 1 100000MN
Mar 31, 2014 1 100000MN
Feb 28, 2014 1 100000MN
Jan 31, 2014 5 500000MN
Dec 31, 2013 5 510400MN
Nov 30, 2013 5 510400MN
Oct 31, 2013 5 510410MN
Sep 30, 2013 1 110440MN
Aug 31, 2013 1 100000MN
Jul 31, 2013 5 500000MN
Jun 30, 2013 1 110410MN
May 31, 2013 1 100000MN
Apr 30, 2013 1 100000MN
Mar 31, 2013 5 500000MN
Feb 28, 2013 5 510300MN
Jan 31, 2013 1 110440MN
Dec 31, 2012 1 100000MN
Nov 30, 2012 1 100000MN
Oct 31, 2012 1 100000MN
Sep 30, 2012 1 100000MN
Aug 31, 2012 1 100000MN
Jul 31, 2012 1 100000MN
Jun 30, 2012 1 100000MN
May 31, 2012 1 100000MN
Apr 30, 2012 1 100000MN
Mar 31, 2012 1 100000MN
Feb 29, 2012 1 100000MN
Jan 31, 2012 1 100000MN
Dec 31, 2011 1 100000MN
Nov 30, 2011 1 100000MN
Oct 31, 2011 1 100000MN
Sep 30, 2011 1 100000MN
Aug 31, 2011 1 100000MN
Jul 31, 2011 1 100000MN
Jun 30, 2011 1 100000MN
May 31, 2011 1 100000MN
Apr 30, 2011 1 100000MN
Mar 31, 2011 1 100000MN
Feb 28, 2011 1 100000MN
Jan 31, 2011 1 100000MN
Dec 31, 2010 1 100000MN
Nov 30, 2010 1 100000MN
Oct 31, 2010 1 100000MN
Sep 30, 2010 1 100000MN
Aug 31, 2010 1 100000MN
Jul 31, 2010 1 100000MN
Jun 30, 2010 1 100000MN
May 31, 2010 1 100000MN
Apr 30, 2010 1 100000MN
Mar 31, 2010 1 100000MN
Feb 28, 2010 1 100000MN
Jan 31, 2010 1 100000MN
Dec 31, 2009 1 100000MN
Nov 30, 2009 1 100000MN
Oct 31, 2009 1 100000MN
Sep 30, 2009 1 100000MN
Aug 31, 2009 1 100000MN
Jul 31, 2009 1 100000MN
Jun 30, 2009 1 100000MN
May 31, 2009 1 100000MN
Apr 30, 2009 1 100000MN
Mar 31, 2009 1 100000MN
Feb 28, 2009 1 100000MN
Jan 31, 2009 1 100000MN
Dec 31, 2008 1 100000MN
Nov 30, 2008 1 100000MN
Oct 31, 2008 1 100000MN
Sep 30, 2008 1 100000MN
Aug 31, 2008 1 100000MN
Jul 31, 2008 1 100000MN
Jun 30, 2008 1 100000MN
May 31, 2008 1 100000MN
Apr 30, 2008 1 100000MN
Mar 31, 2008 1 200000MN
Feb 29, 2008 1 100000MN
Jan 31, 2008 1 100000MN
Dec 31, 2007 1 100000MN
Nov 30, 2007 1 100000MN
Oct 31, 2007 1 100000MN
Sep 30, 2007 1 100000MN
Aug 31, 2007 1 100000MN
Jul 31, 2007 1 100000MN
Jun 30, 2007 1 100000MN
May 31, 2007 1 100000MN
Apr 30, 2007 1 100000MN
Mar 31, 2007 1 100000MN
Feb 28, 2007 1 100000MN
Jan 31, 2007 1 100000MN
Dec 31, 2006 1 100000MN
Nov 30, 2006 1 100000MN
Oct 31, 2006 1 100000MN
Sep 30, 2006 1 100000MN
Aug 31, 2006 1 100000MN
Jul 31, 2006 1 100000MN
Jun 30, 2006 1 100000MN
May 31, 2006 1 100000MN
Apr 30, 2006 1 100000MN
Mar 31, 2006 1 100000MN
Feb 28, 2006 1 100000MN
Jan 31, 2006 1 100000MN
Dec 31, 2005 1 100000MN
Nov 30, 2005 1 100000MN
Oct 31, 2005 1 100000MN
Sep 30, 2005 1 100000MN
Aug 31, 2005 1 100000MN
Jul 31, 2005 1 100000MN
Jun 30, 2005 1 100000MN
May 31, 2005 1 100000MN
Apr 30, 2005 1 100000MN
Mar 31, 2005 1 100000MN
Feb 28, 2005 1 100000MN
Jan 31, 2005 1 100000MN
Dec 31, 2004 1 100000MN
Nov 30, 2004 1 100000MN
Oct 31, 2004 1 100000MN
Sep 30, 2004 1 100000MN
Aug 31, 2004 1 100000MN
Jul 31, 2004 1 100000MN
Jun 30, 2004 1 100000MN
May 31, 2004 1 100000MN
Apr 30, 2004 1 100000MN
Mar 31, 2004 1 100000MN
Feb 29, 2004 1 100000MN
Jan 31, 2004 1 100000MN
Dec 31, 2003 1 100000MN
Nov 30, 2003 1 100000MN
Oct 31, 2003 1 100000MN
Sep 30, 2003 1 100000MN
Aug 31, 2003 1 100000MN
Jul 31, 2003 1 100000MN
Jun 30, 2003 1 100000MN
May 31, 2003 1 100000MN
Apr 30, 2003 1 100000MN
Mar 31, 2003 1 100000MN
Feb 28, 2003 1 100000MN
Jan 31, 2003 1 100000MN
Dec 31, 2002 1 100000MN
Nov 30, 2002 1 100000MN
Oct 31, 2002 1 100000MN
Sep 30, 2002 1 100000MN
Aug 31, 2002 1 100000MN
Jul 31, 2002 1 100000MN
Jun 30, 2002 1 100000MN
May 31, 2002 1 100000MN
Apr 30, 2002 1 100000MN
Mar 31, 2002 1 100000MN
Feb 28, 2002 1 100000MN
Jan 31, 2002 1 100000MN
Exclude results older than 2021


More information for this water system: SDWIS ID 3477
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.

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