OHA Drinking Water Services
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT

Alerts indicate water quality tests with analytical results greater than the detection limit or one-half of the maximum allowable contaminant level which may require some follow-up actions by Drinking Water Services. See the Contacts link for reports on follow-up actions. Alerts are not water quality violations. Violations for this water system can be found here.

Alert Type Abbreviations:  CHEM = Chemical, COLI = Coliform, LCR = Lead and copper 90th percentile
Results:  45 alerts found for this water system.Show response time
Water Quality Alerts
Alert ID Sample
Date
Alert
Date
Source
ID
Source Name Alert
Type
Contaminant Result Alert
Level
MCL Contact
Report
COLI19288 09/19/2019 09/20/2019 DIST-A 93 COLI COLIFORM, TOTAL (TCR) Present Present Present09/20/2019
COLI18941 06/19/2019 06/20/2019 DIST-A #121 COLI COLIFORM, TOTAL (TCR) Present Present Present06/20/2019
COLI18926 06/12/2019 06/13/2019 DIST-A sample station #145 COLI COLIFORM, TOTAL (TCR) Present Present Present06/13/2019
COLI18926 06/12/2019 06/13/2019 DIST-A sample station #95 COLI COLIFORM, TOTAL (TCR) Present Present Present06/13/2019
COLI17960 07/10/2018 07/11/2018 DIST-A 144 COLI COLIFORM, TOTAL (TCR) Present Present Present07/11/2018
COLI17948 07/03/2018 07/06/2018 DIST-A site unknown COLI COLIFORM, TOTAL (TCR) Present Present Present07/04/2018
COLI16790 06/06/2017 06/07/2017 DIST-A ss#115 COLI COLIFORM, TOTAL (TCR) Present Present Present06/07/2017
CHEM7421 10/26/2016 11/23/2016 LCR LEAD 90TH % VALUE 0.01740.0155 12/12/2016
COLI15917 09/07/2016 09/08/2016 DIST-A #48 COLI COLIFORM, TOTAL (TCR) Present Present Present09/08/2016
COLI12691 03/25/2014 03/26/2014 DIST-A ss #52 COLI COLIFORM, TOTAL (TCR) Present Present Present03/26/2014
CHEM6173 11/18/2013 01/15/2014 LCR LEAD 90TH % VALUE 0.01590.0155 01/15/2014
COLI11664 05/15/2013 05/16/2013 DIST-A sample station #69 COLI COLIFORM, E. COLI Present Present Present05/16/2013
COLI11664 05/15/2013 05/16/2013 DIST-A sample station #69 COLI COLIFORM, TOTAL (TCR) Present Present Present05/16/2013
COLI11327 12/17/2012 12/18/2012 DIST-A ss 58 COLI COLIFORM, TOTAL (TCR) Present Present Present12/18/2012
COLI11226 11/28/2012 11/29/2012 DIST-A 58 COLI COLIFORM, TOTAL (TCR) Present Present Present11/29/2012
COLI9855 10/24/2011 10/26/2011 DIST-A #11 COLI COLIFORM, TOTAL (TCR) Present Present Present10/25/2011
COLI9779 10/11/2011 10/14/2011 DIST-A ss 80 COLI COLIFORM, TOTAL (TCR) Present Present Present10/12/2011
COLI9687 09/13/2011 09/26/2011 DIST-A #69 COLI COLIFORM, TOTAL (TCR) Present Present Present09/14/2011
COLI8964 02/07/2011 02/08/2011 DIST-A ss #7 COLI COLIFORM, TOTAL (TCR) Present Present Present02/08/2011
COLI8669 11/18/2010 11/22/2010 DIST-A 58 COLI COLIFORM, TOTAL (TCR) Present Present Present11/19/2010
COLI7922 07/19/2010 07/20/2010 DIST-A ss #64 COLI COLIFORM, TOTAL (TCR) Present Present Present07/21/2010
COLI6818 09/22/2009 09/23/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present09/24/2009
COLI6818 09/22/2009 09/23/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present09/24/2009
COLI5503 08/13/2008 08/14/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present08/14/2008
COLI4903 12/17/2007 12/18/2007 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/18/2007
COLI4697 10/16/2007 10/17/2007 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI4638 10/03/2007 10/05/2007 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI4036 03/21/2007 03/22/2007 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
CHEM2376 11/02/2006 03/16/2007 LCR LEAD 90TH % VALUE 0.0170.0155
COLI2900 03/21/2006 03/23/2006 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2323 08/08/2005 08/19/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
CHEM1620 01/27/2003 05/27/2005 DIST-A Distribution System CHEM TOTAL HALOACETIC ACIDS (HAA5) 0.0630.06 0.06
CHEM1620 01/27/2003 05/27/2005 DIST-A Distribution System CHEM TOTAL HALOACETIC ACIDS (HAA5) 0.060.06 0.06
CHEM1620 01/27/2003 05/27/2005 DIST-A Distribution System CHEM TOTAL HALOACETIC ACIDS (HAA5) 0.0630.06 0.06
CHEM1580 11/09/2001 05/11/2005 LCR LEAD 90TH % VALUE 0.020.0155
CHEM1580 11/05/1998 05/11/2005 LCR LEAD 90TH % VALUE 0.0190.0155
CHEM1273 06/10/1992 03/21/2005 LCR COPPER 90TH % VALUE 1.411.35
CHEM1273 09/14/2000 03/21/2005 LCR LEAD 90TH % VALUE 0.0220.0155
CHEM1273 05/10/2001 03/21/2005 LCR LEAD 90TH % VALUE 0.0170.0155
CHEM1273 12/08/1992 03/21/2005 LCR LEAD 90TH % VALUE 0.0290.0155
CHEM1273 05/12/1999 03/21/2005 LCR LEAD 90TH % VALUE 0.0210.0155
CHEM1273 06/10/1992 03/21/2005 LCR LEAD 90TH % VALUE 0.0280.0155
COLI1381 08/09/2004 08/17/2004 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI1098 04/05/2004 04/13/2004 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
CHEM288 01/21/2003 01/23/2003 LCR LEAD 90TH % VALUE 0.0170.0155


Archived Alerts (SWS database)
Date Source Chemical Results mg/l MCL mg/l
05/20/2002Coliform
02/05/2001Coliform
09/12/2000Coliform
03/23/1998Coliform
12/01/1997Coliform
09/08/1997Coliform
12/11/1995Coliform
11/27/1995Coliform
10/23/1995Coliform
10/17/1994Coliform
10/10/1994Coliform
09/19/1994Coliform
11/29/1993Coliform
11/15/1993Coliform
11/12/1993Coliform
11/10/1993Coliform



For further information on this public water system, click on the area of interest below:
System Info :: Report for Lenders :: Alerts :: Violations :: Compliance & Enforcement :: Contacts & Advisories :: Site Visits :: Public Notice
Coliform Summary :: Coliform Results :: Sampling Schedule for Coliform :: Groundwater/GWUDI Source Details :: Plan Review :: Annual Fee
Chemical Group Summary :: Latest Chemical Results :: Entry Point Detects :: Single Analyte Results 
Chemical Schedule Summary :: Chemical Schedule Details
Lead & Copper :: Corrosion Control (LCR) :: Nitrate :: Arsenic :: Radionuclides :: GWR 4-Log :: LT2 :: Cyanotoxins :: PFAS
DBPs :: TOC & Alkalinity :: DBP Sample Sites :: FANLs :: MRDL :: Turbidity :: SWTR :: RAA :: LRAA For SDWIS: 4065