OHA Drinking Water Services
PWS ID: 90872 ---- NORTHWEST ALUMINUM COMPANY ---- INACTIVE
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
206653-I 12/17/2020 12/21/2020 NITRATE EP FOR WELL #1 & #3 EP-AND
1910126701-I 10/29/2019 12/12/2019 NITRATE EP FOR WELL #1 & #3 EP-AND
1910122001-I 10/28/2019 01/31/2020 NITRATE EP FOR WELL #3 EP-BND
201698-I 11/28/2018 11/30/2018 NITRATE EP FOR WELL #1 & #3 EP-AND
201699-I 11/28/2018 11/30/2018 NITRATE EP FOR WELL #3 EP-BND
201700-I 11/28/2018 11/30/2018 NITRATE EP FOR WELL #4 EP-CND
197046-I 03/14/2017 03/16/2017 NITRATE EP FOR WELL #1 & #3 EP-AND
197047-I 03/14/2017 03/16/2017 NITRATE EP FOR WELL #3 EP-BND
197045-I 03/14/2017 03/16/2017 NITRATE EP FOR WELL #4 EP-CND
4401683131-I 12/06/2016 01/12/2017 NITRATE EP FOR WELL #1 & #3 EP-AND
4401683132-I 12/06/2016 01/12/2017 NITRATE EP FOR WELL #3 EP-BND
4401683133-I 12/06/2016 01/12/2017 NITRATE EP FOR WELL #4 EP-CND
194298-I 12/16/2015 12/18/2015 NITRATE EP FOR WELL #1 & #3 EP-AND
194300-I 12/16/2015 12/18/2015 NITRATE EP FOR WELL #3 EP-BND
194299-I 12/16/2015 12/18/2015 NITRATE EP FOR WELL #4 EP-CND
192202-I 12/16/2014 12/18/2014 NITRATE EP FOR WELL #1 & #3 EP-AND
192203-I 12/16/2014 12/18/2014 NITRATE EP FOR WELL #3 EP-BND
192204-I 12/16/2014 12/18/2014 NITRATE EP FOR WELL #4 EP-CND
335201801-I 12/17/2013 01/07/2014 NITRATE EP FOR WELL #1 & #3 EP-AND
335201901-I 12/17/2013 01/07/2014 NITRATE EP FOR WELL #3 EP-BND
335201601-I 12/17/2013 01/07/2014 NITRATE EP FOR WELL #4 EP-CND
2507881-I 03/14/2012 03/28/2012 NITRATE EP FOR WELL #1 & #3 EP-AND
2507882-I 03/14/2012 03/28/2012 NITRATE EP FOR WELL #3 EP-BND
2507883-I 03/14/2012 03/28/2012 NITRATE EP FOR WELL #4 EP-CND
PTI070401-I 09/21/2010 10/12/2010 NITRATE EP FOR WELL #1 & #3 EP-AND
PTH051701-I 09/15/2010 10/12/2010 NITRATE EP FOR WELL #3 EP-BND
PTI051501-I 09/15/2010 10/12/2010 NITRATE EP FOR WELL #4 EP-CND
573-I 12/29/2009 01/04/2010 NITRATE EP FOR WELL #1 & #3 EP-AND
572-I 12/29/2009 01/04/2010 NITRATE EP FOR WELL #3 EP-BND
574-I 12/29/2009 01/04/2010 NITRATE EP FOR WELL #4 EP-CND
300-I 12/17/2008 12/26/2008 NITRATE EP FOR WELL #1 & #3 EP-AND
301-I 12/17/2008 12/26/2008 NITRATE EP FOR WELL #3 EP-BND
302-I 12/17/2008 12/26/2008 NITRATE EP FOR WELL #4 EP-CND
221 10/08/2007 10/12/2007 NITRATE EP FOR WELL #1 & #3 EP-AND
222 10/08/2007 10/12/2007 NITRATE EP FOR WELL #3 EP-BND
223 10/08/2007 10/12/2007 NITRATE EP FOR WELL #4 EP-CND
109 02/22/2006 02/26/2007 NITRATE EP FOR WELL #1 & #3 EP-AND
110 02/22/2006 02/26/2007 NITRATE EP FOR WELL #3 EP-BND
111 02/22/2006 02/26/2007 NITRATE EP FOR WELL #4 EP-CND
A50809CI-1 08/08/2005 08/30/2005 NITRATE EP FOR WELL #1 & #3 EP-AND
A50809CI-2 08/08/2005 08/30/2005 NITRATE EP FOR WELL #3 EP-BND
A50809CI-3 08/08/2005 08/30/2005 NITRATE EP FOR WELL #4 EP-CND
A40708BO-2 07/07/2004 08/06/2004 NITRATE EP FOR WELL #1 & #3 EP-AND
A40708BO-3 07/07/2004 08/06/2004 NITRATE EP FOR WELL #3 EP-BND
A40708BO-4 07/07/2004 08/06/2004 NITRATE EP FOR WELL #4 EP-CND
A30611M-1 06/10/2003 06/20/2003 NITRATE EP FOR WELL #1 & #3 EP-AND
A30611M-2 06/10/2003 06/20/2003 NITRATE EP FOR WELL #3 EP-BND
A30611M-3 06/10/2003 06/20/2003 NITRATE EP FOR WELL #4 EP-CND
A21122AH-1I 11/21/2002 01/15/2003 NITRATE EP FOR WELL #1 & #3 EP-AND
A21122AG-1I 11/21/2002 01/15/2003 NITRATE EP FOR WELL #3 EP-BND
A21122AK-1I 11/21/2002 01/15/2003 NITRATE EP FOR WELL #4 EP-CND
 

Archived Nitrate Samples
Sample ID Sample
Date
Date
Received
Analyte Name Source Name Source
ID
Result
A01010ACAA 10/09/2000 10/17/2000 Nitrate WELL #1 AAND
A01010ACBA 10/09/2000 10/17/2000 Nitrate WELL #3 BAND
A01010ACCA 10/09/2000 10/17/2000 Nitrate WELL #4 CAND
990602SAA 06/01/1999 09/20/1999 Nitrate WELL #1 AAND
990602SBA 06/01/1999 09/20/1999 Nitrate WELL #3 BAND
990602SCA 06/01/1999 09/20/1999 Nitrate WELL #4 CAND
980716APAA 07/14/1998 07/30/1998 Nitrate WELL #1 AAND
980716APBA 07/14/1998 07/30/1998 Nitrate WELL #3 BAND
980716APCA 07/14/1998 07/30/1998 Nitrate WELL #4 CAND
9709-048-2 09/09/1997 10/01/1997 Nitrate ENTRY POINT - WELL #1 AND
9709-048-3 09/09/1997 10/01/1997 Nitrate ENTRY POINT - WELL #3 BND
9709-048-4 09/09/1997 10/01/1997 Nitrate ENTRY POINT - WELL #4 CND
9605-163-1 05/29/1996 07/30/1996 Nitrate ENTRY POINT - WELL #1 A0.02
9605-163-2 05/29/1996 07/30/1996 Nitrate ENTRY POINT - WELL #3 B0.02
9605-163-3 05/29/1996 07/30/1996 Nitrate ENTRY POINT - WELL #4 CND
4249 05/10/1995 05/26/1995 Nitrate WELL #1 AAND
4255 05/10/1995 05/26/1995 Nitrate WELL #3 BAND
4284 05/10/1995 05/26/1995 Nitrate WELL #4 CAND
3722 07/28/1994 03/15/1995 Nitrate WELL #1 AAND
3723 07/28/1994 03/15/1995 Nitrate WELL #3 BAND
3726 07/28/1994 03/15/1995 Nitrate WELL #4 CAND
10862 03/24/1993 11/10/1993 Nitrate WELL #3 - WELL #3 BAND
10902 03/08/1993 11/10/1993 Nitrate WELL #4 - WELL #4 CAND
10813 02/22/1993 11/10/1993 Nitrate WELL #1 - WELL #1 AAND
-1902378 06/17/1980 06/17/1980 Nitrate WELL #1 AAND
 




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