OHA Drinking Water Services
PWS ID: 00379 ---- JOINT WATER COMMISSION
Excel Spreadsheet

MCL = 10 mg/L; MCL exceedances are indicated with red text.
ND = Not detected at the minimum reporting level.
Nitrate Samples
Sample ID Sample
Date		 Date
Received		 Analyte Name Source Name Source
ID		 Result
(mg/L)		 Comments
22-71086-I 11/02/2022 01/06/2023 NITRATE EP FOR TUALATIN RIVER EP-A0.05
2221620-I 03/31/2022 05/23/2022 NITRATE EP FOR TUALATIN RIVER EP-A0.32
2180746-I 11/03/2021 12/07/2021 NITRATE EP FOR TUALATIN RIVER EP-A0.24
2123196-I 04/07/2021 05/27/2021 NITRATE EP FOR TUALATIN RIVER EP-A0.2
2074464-I 11/04/2020 12/02/2020 NITRATE EP FOR TUALATIN RIVER EP-AND
2021410-I 04/01/2020 05/08/2020 NITRATE EP FOR TUALATIN RIVER EP-A0.3
1981259 11/04/2019 12/17/2019 NITRATE EP FOR TUALATIN RIVER EP-A0.04
1928990A-I 04/24/2019 06/26/2019 NITRATE EP FOR TUALATIN RIVER EP-A0.32
1884309 11/05/2018 12/28/2018 NITRATE EP FOR TUALATIN RIVER EP-A0.04
1809141 02/07/2018 06/05/2018 NITRATE EP FOR TUALATIN RIVER EP-A0.54
1749425 08/29/2017 10/06/2017 NITRATE EP FOR TUALATIN RIVER EP-A0.12
1706889-I 02/13/2017 03/20/2017 NITRATE EP FOR TUALATIN RIVER EP-A0.49
1645047-I 08/02/2016 10/07/2016 NITRATE EP FOR TUALATIN RIVER EP-A0.18
1605265 02/02/2016 03/11/2016 NITRATE EP FOR TUALATIN RIVER EP-A0.52
1535201 08/03/2015 10/02/2015 NITRATE EP FOR TUALATIN RIVER EP-A0.14
1507813-I 02/23/2015 03/30/2015 NITRATE EP FOR TUALATIN RIVER EP-A0.74
1434288-I 08/06/2014 10/28/2014 NITRATE EP FOR TUALATIN RIVER EP-A0.18
1434289-I 08/06/2014 10/28/2014 NITRATE EP FOR TUALATIN RIVER EP-A0.19
1406471 02/12/2014 03/24/2014 NITRATE EP FOR TUALATIN RIVER EP-A0.5
04634783-I 08/19/2013 10/30/2013 NITRATE EP FOR TUALATIN RIVER EP-A0.12
WA20000834774 08/19/2013 10/30/2013 NITRATE EP FOR TUALATIN RIVER EP-A0.06
04604056A-I 02/04/2013 04/22/2013 NITRATE EP FOR TUALATIN RIVER EP-A0.27
04604086A-I 02/04/2013 04/16/2013 NITRATE EP FOR TUALATIN RIVER EP-A0.24
04630033-I 08/06/2012 10/10/2012 NITRATE EP FOR TUALATIN RIVER EP-A0.21
04630040-I 08/06/2012 10/10/2012 NITRATE EP FOR TUALATIN RIVER EP-A0.21
04044-I 02/06/2012 02/29/2012 NITRATE EP FOR TUALATIN RIVER EP-A0.47
04041-I 02/06/2012 02/29/2012 NITRATE EP FOR TUALATIN RIVER EP-A0.42
04628954-I 08/17/2011 09/19/2011 NITRATE EP FOR TUALATIN RIVER EP-AND
104501103-I 02/14/2011 04/27/2011 NITRATE EP FOR TUALATIN RIVER EP-A0.6
104501104-I 02/14/2011 04/27/2011 NITRATE EP FOR TUALATIN RIVER EP-A0.7
1022326-I 08/11/2010 10/14/2010 NITRATE EP FOR TUALATIN RIVER EP-AND
1005314-I 02/22/2010 04/12/2010 NITRATE EP FOR TUALATIN RIVER EP-A0.8
0923929-I 08/27/2009 10/19/2009 NITRATE EP FOR TUALATIN RIVER EP-AND
0904015-I 02/09/2009 03/27/2009 NITRATE EP FOR TUALATIN RIVER EP-A0.6
080430506-I 02/12/2008 08/07/2008 NITRATE EP FOR TUALATIN RIVER EP-A0.6
072261011-I 08/14/2007 08/07/2008 NITRATE EP FOR TUALATIN RIVER EP-A0.5
06045/15I 02/14/2006 03/21/2006 NITRATE EP FOR TUALATIN RIVER EP-A0.8
06045/16I 02/14/2006 03/21/2006 NITRATE EP FOR TUALATIN RIVER EP-A1
05039/15I 02/08/2005 03/14/2005 NITRATE EP FOR TUALATIN RIVER EP-A0.7
04223/14I 08/10/2004 09/09/2004 NITRATE EP FOR TUALATIN RIVER EP-AND
04041/21I 02/10/2004 03/12/2004 NITRATE EP FOR TUALATIN RIVER EP-A0.6
03224/21I 08/12/2003 09/15/2003 NITRATE EP FOR TUALATIN RIVER EP-AND
03042/11I 02/11/2003 03/11/2003 NITRATE EP FOR TUALATIN RIVER EP-A1.1
02225/39I 08/13/2002 10/21/2002 NITRATE EP FOR TUALATIN RIVER EP-AND
02008/42I 01/08/2002 02/15/2002 NITRATE EP FOR TUALATIN RIVER EP-A1
 

Archived Nitrate Samples
Sample ID Sample
Date		 Date
Received		 Analyte Name Source Name Source
ID		 Result
0122643 08/14/2001 10/01/2001 Nitrate WTP FOR TUALATIN RIVER AND
0122644 08/14/2001 10/01/2001 Nitrate TUALATIN RIVER AAND
01038/05 02/06/2001 03/12/2001 Nitrate WTP FOR TUALATIN RIVER A1
01038/06 02/06/2001 03/12/2001 Nitrate TUALATIN RIVER AA1
00221/97 08/08/2000 12/22/2000 Nitrate EP N.FORK OF TRASK RIVER FEEDS WTP BND
00221/96 08/08/2000 12/22/2000 Nitrate NORTH FORK OF TRASK RIVER - MIDDLE FORK BAND
00053/10 02/22/2000 12/22/2000 Nitrate EP N.FORK OF TRASK RIVER FEEDS WTP B0.8
00053/09 02/22/2000 12/22/2000 Nitrate NORTH FORK OF TRASK RIVER - MIDDLE FORK BA0.8
355/20 12/21/1999 01/31/2000 Nitrate EP N.FORK OF TRASK RIVER FEEDS WTP B0.7
355/19 12/21/1999 01/31/2000 Nitrate NORTH FORK OF TRASK RIVER - MIDDLE FORK BA0.6
990113CC*A 01/13/1999 03/18/1999 Nitrate WTP FOR TUALATIN RIVER A0.42
980715CX2A 07/15/1998 08/06/1998 Nitrate WTP FOR TUALATIN RIVER A0.21
980715CX*A 07/15/1998 08/06/1998 Nitrate WTP FOR TUALATIN RIVER A0.21
980128BU*A 01/28/1998 02/18/1998 Nitrate WTP FOR TUALATIN RIVER A0.48
980128BV*A 01/28/1998 03/16/1998 Nitrate WTP FOR TUALATIN RIVER A0.49
970724CC*A 07/24/1997 03/17/1998 Nitrate WTP FOR TUALATIN RIVER A0.22
970115AR*B 01/15/1997 04/24/1997 Nitrate EP N.FORK OF TRASK RIVER FEEDS WTP B0.4
970115ARBA 01/15/1997 04/24/1997 Nitrate NORTH FORK OF TRASK RIVER - MIDDLE FORK BA0.41
26080-1 03/05/1996 05/10/1996 Nitrate WTP FOR TUALATIN RIVER A0.6
25611-1 12/20/1995 01/17/1996 Nitrate WTP FOR TUALATIN RIVER A0.36
23536-2 04/27/1995 06/07/1995 Nitrate WTP FOR TUALATIN RIVER AND
23259-2 03/29/1995 06/07/1995 Nitrate WTP FOR TUALATIN RIVER A0.5
21039-1 08/11/1994 02/17/1995 Nitrate WTP FOR TUALATIN RIVER A1
19047-1 01/18/1994 03/09/1994 Nitrate STANDARD ENTRY POINT A0.84
18871-1 12/28/1993 02/07/1994 Nitrate STANDARD ENTRY POINT A1.7
30202-8 02/01/1993 03/08/1994 Nitrate STANDARD ENTRY POINT A1.07
-1974131 04/14/1992 05/22/1992 Nitrate TUALATIN RIVER A0.6
-1974132 05/01/1991 06/18/1991 Nitrate TUALATIN RIVER A1
-1974133 05/23/1990 06/20/1990 Nitrate TUALATIN RIVER A0.33
-1974134 04/11/1989 05/16/1989 Nitrate TUALATIN RIVER A0.56
-1974135 04/27/1988 06/03/1988 Nitrate TUALATIN RIVER A0.49
-1974136 05/19/1987 06/25/1987 Nitrate TUALATIN RIVER A0.42
-1974137 07/16/1986 07/16/1986 Nitrate TUALATIN RIVER AND
 



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: 3889
Information by county:
Inventory :: Surface Water Systems :: Water System Surveys :: Outstanding Performers :: Plan Reviews :: System Scores :: Exceedances
Alerts :: Violations :: Compliance & Enforcement :: Significant Deficiencies :: Cross Connection ASRs :: Treatment Plant Inspections :: Fluoride
Water Advisories :: Contact Reports :: Cyanotoxins :: PFAS :: Post-wildfire VOCs :: Public Notices
Inventory List for all Oregon Drinking Water Systems in Excel or printable screen format
Lab Help: Tools for Laboratories :: Staff/Partner Login
Introduction :: Data Search Options :: Water System Search :: DWS Home