PWS ID: 90872 ---- NORTHWEST ALUMINUM COMPANY

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, SOURCE = Coliform source sample*, SODIUM = Sodium*
*Non-alert (water quality notice)
Results:  108 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
COLI7194 12/29/2009 12/30/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/31/2009
COLI6000 12/22/2008 12/24/2008 DIST-A Distribution System COLI COLIFORM, E. COLI Present Present Present12/22/2008
COLI6000 12/22/2008 12/24/2008 DIST-A Distribution System COLI COLIFORM, E. COLI Present Present Present12/22/2008
COLI6000 12/22/2008 12/24/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/22/2008
COLI6000 12/22/2008 12/24/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/22/2008
COLI6000 12/22/2008 12/24/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/22/2008
COLI6000 12/22/2008 12/24/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/22/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, E. COLI Present Present Present12/18/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, E. COLI Present Present Present12/18/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, E. COLI Present Present Present12/18/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, E. COLI Present Present Present12/18/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/18/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/18/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/18/2008
COLI5985 12/17/2008 12/18/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present12/18/2008
COLI8766 12/14/2010 12/15/2010 DIST-A NWAS Lunchroom COLI COLIFORM, TOTAL (TCR) Present Present Present12/16/2010
COLI15035 12/08/2015 12/09/2015 DIST-A personnel sink mens COLI COLIFORM, TOTAL (TCR) Present Present Present12/15/2015
COLI8758 12/13/2010 12/14/2010 DIST-A 2929 west 2nd st COLI COLIFORM, TOTAL (TCR) Present Present Present12/15/2010
COLI7116 11/18/2009 12/02/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present11/19/2009
COLI19482 10/31/2019 11/04/2019 DIST-A 3313 W 2nd St WROB COLI COLIFORM, TOTAL (TCR) Present Present Present11/05/2019
COLI19482 10/31/2019 11/04/2019 DIST-A 3313 W 2nd St MRPB COLI COLIFORM, TOTAL (TCR) Present Present Present11/05/2019
COLI19468 10/28/2019 10/29/2019 DIST-A 3313 W 2nd St WRPB COLI COLIFORM, TOTAL (TCR) Present Present Present11/05/2019
COLI6943 10/13/2009 10/14/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present10/15/2009
COLI20347 10/01/2020 10/02/2020 DIST-A MROB COLI COLIFORM, TOTAL (TCR) Present Present Present10/06/2020
COLI20347 10/01/2020 10/02/2020 DIST-A WRPB COLI COLIFORM, TOTAL (TCR) Present Present Present10/06/2020
COLI20347 10/01/2020 10/02/2020 DIST-A MRPB COLI COLIFORM, TOTAL (TCR) Present Present Present10/06/2020
COLI12247 10/02/2013 10/04/2013 DIST-A guard shack sink COLI COLIFORM, TOTAL (TCR) Present Present Present10/03/2013
COLI20323 09/29/2020 09/30/2020 DIST-A Women's Restroom Personnel Bld COLI COLIFORM, TOTAL (TCR) Present Present Present10/01/2020
COLI19186 08/22/2019 08/23/2019 DIST-A MRPB COLI COLIFORM, TOTAL (TCR) Present Present Present09/30/2019
COLI19186 08/22/2019 08/23/2019 DIST-A MROB COLI COLIFORM, TOTAL (TCR) Present Present Present09/30/2019
COLI12178 09/23/2013 09/25/2013 DIST-A old guard shack security sink COLI COLIFORM, TOTAL (TCR) Present Present Present09/24/2013
COLI12178 09/23/2013 09/25/2013 SRC-AA well #1 SOURCE* COLIFORM, TOTAL (TCR) Present Present Present09/24/2013
COLI5636 09/17/2008 09/18/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present09/22/2008
COLI5636 09/17/2008 09/18/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present09/22/2008
COLI12136 09/15/2013 09/20/2013 DIST-A old guard shack security sink COLI COLIFORM, TOTAL (TCR) Present Present Present09/20/2013
COLI19164 08/19/2019 08/20/2019 DIST-A 3313 W 2nd WRPB COLI COLIFORM, TOTAL (TCR) Present Present Present08/21/2019
COLI5493 08/11/2008 08/12/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present08/18/2008
COLI6543 08/04/2009 08/05/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present08/12/2009
COLI6523 07/29/2009 07/30/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present08/03/2009
COLI19019 07/11/2019 07/12/2019 DIST-A 3313 W 2nd St MROB COLI COLIFORM, TOTAL (TCR) Present Present Present08/01/2019
COLI18038 07/30/2018 08/01/2018 DIST-A mens restroom office bldg. COLI COLIFORM, TOTAL (TCR) Present Present Present08/01/2018
COLI18038 07/30/2018 08/01/2018 DIST-A mens restroom personnel bldg. COLI COLIFORM, TOTAL (TCR) Present Present Present08/01/2018
COLI18038 07/30/2018 08/01/2018 DIST-A womens restroom personnel bldg COLI COLIFORM, TOTAL (TCR) Present Present Present08/01/2018
COLI18015 07/23/2018 07/25/2018 DIST-A 3313 w 2nd st. wrpb COLI COLIFORM, TOTAL (TCR) Present Present Present07/24/2018
COLI18015 07/23/2018 07/25/2018 DIST-A 3313 w 2nd st. mrpb COLI COLIFORM, TOTAL (TCR) Present Present Present07/24/2018
COLI18015 07/23/2018 07/25/2018 DIST-A 3313 w 2nd st. mrob COLI COLIFORM, TOTAL (TCR) Present Present Present07/24/2018
COLI6496 07/21/2009 07/22/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present07/23/2009
COLI19003 07/08/2019 07/10/2019 DIST-A Womens Restroom Personnel Bldg COLI COLIFORM, TOTAL (TCR) Present Present Present07/10/2019
COLI19003 07/08/2019 07/10/2019 DIST-A Mens Restroom Personnel Bldg COLI COLIFORM, TOTAL (TCR) Present Present Present07/10/2019
COLI18986 07/02/2019 07/03/2019 DIST-A 3313 W 2nd Ave WRPB COLI COLIFORM, TOTAL (TCR) Present Present Present07/08/2019
COLI17862 06/07/2018 06/08/2018 DIST-A womens restroom sink COLI COLIFORM, TOTAL (TCR) Present Present Present06/11/2018
COLI7364 02/17/2010 02/18/2010 DIST-A guard house nwa 3313 w 2nd COLI COLIFORM, TOTAL (TCR) Present Present Present02/22/2010
COLI18646 01/29/2019 01/31/2019 DIST-A womens rr personnel bldg COLI COLIFORM, TOTAL (TCR) Present Present Present01/30/2019
COLI7203 01/05/2010 01/06/2010 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present01/06/2010
COLI7203 01/05/2010 01/06/2010 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present01/06/2010
COLI7203 01/05/2010 01/06/2010 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present01/06/2010
COLI7203 01/05/2010 01/06/2010 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present01/06/2010
CHEM8839 10/28/2019 02/06/2020 EP-B EP FOR WELL #3 SODIUM* SODIUM 27.420
CHEM8761 10/29/2019 12/19/2019 EP-A EP FOR WELL #1 SODIUM* SODIUM 21.720
COLI18488 12/03/2018 12/06/2018 DIST-A 3313 W 2nd St MROB COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18488 12/03/2018 12/06/2018 DIST-A 3313 W 2nd St WRPB COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18467 11/28/2018 11/30/2018 DIST-A 3313 W. 2nd St. WRPB COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18390 11/05/2018 11/07/2018 DIST-A 3313 W. 2nd St. mrob COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18390 11/05/2018 11/07/2018 DIST-A 3313 W.2nd Ave. mrpb COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18390 11/05/2018 11/07/2018 DIST-A 3313 W. 2nd St. wrpb COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18373 10/30/2018 10/31/2018 DIST-A 3313 W 2nd St. wrpb COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18181 09/06/2018 09/10/2018 DIST-A 3313 w 2nd ave wrpb COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18181 09/06/2018 09/10/2018 DIST-A 3313 w 2nd ave mrpb COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18181 09/06/2018 09/10/2018 DIST-A 3313 w 2nd ave mrob COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18142 08/28/2018 08/29/2018 DIST-A womens restroom personnel bldg COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18142 08/28/2018 08/29/2018 DIST-A mens restroom personnel bldg COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI18142 08/28/2018 08/29/2018 DIST-A mens restroom office bldg COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI9368 07/07/2011 07/11/2011 DIST-A lunch room COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI9300 06/29/2011 06/30/2011 DIST-A NWA guard house COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI8934 01/26/2011 01/27/2011 DIST-A GUARD HS 3313 W 2ND COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI8801 12/20/2010 12/22/2010 DIST-A GUARD HS 3313 W 2ND COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI8801 12/20/2010 12/22/2010 DIST-A NWAS LUNCH RM 2929 W COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI8801 12/20/2010 12/22/2010 SRC-AA WELL #1 SOURCE* COLIFORM, TOTAL (TCR) Present Present Present
CHEM4472 09/21/2010 10/25/2010 EP-A EP FOR WELL #1 SODIUM* SODIUM 22.120
CHEM4472 09/15/2010 10/25/2010 EP-B EP FOR WELL #3 SODIUM* SODIUM 34.720
CHEM4472 09/15/2010 10/25/2010 EP-C EP FOR WELL #4 SODIUM* SODIUM 22.620
COLI7214 01/07/2010 01/08/2010 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI6976 10/19/2009 10/20/2009 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI5521 08/13/2008 08/20/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI5523 08/13/2008 08/20/2008 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI3931 01/15/2007 01/17/2007 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2416 09/12/2005 09/16/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2411 09/08/2005 09/13/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2401 09/06/2005 09/09/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2322 08/08/2005 08/17/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2327 08/10/2005 08/17/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2327 08/10/2005 08/17/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI2327 08/10/2005 08/17/2005 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI953 01/14/2004 01/20/2004 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI940 01/13/2004 01/15/2004 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI820 11/18/2003 11/24/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI820 11/18/2003 11/24/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI805 11/12/2003 11/17/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI738 10/13/2003 10/29/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI728 10/16/2003 10/27/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI725 10/20/2003 10/24/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI719 10/16/2003 10/22/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI702 10/06/2003 10/15/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
COLI667 09/30/2003 10/07/2003 DIST-A Distribution System COLI COLIFORM, TOTAL (TCR) Present Present Present
CHEM279 11/21/2002 01/21/2003 EP-A ENTRY POINT - WELL #1 CHEM CADMIUM 0.00320.0025 0.005
CHEM279 11/21/2002 01/21/2003 EP-A ENTRY POINT - WELL #1 SODIUM* SODIUM 2620
CHEM279 11/21/2002 01/21/2003 EP-B ENTRY POINT - WELL #3 SODIUM* SODIUM 3520
CHEM279 11/21/2002 01/21/2003 EP-C ENTRY POINT - WELL #4 SODIUM* SODIUM 2220
*Non-alert (water quality notice)


Archived Alerts (SWS database)
Date Source Chemical Results mg/l MCL mg/l
04/30/2002Coliform
01/29/2002Coliform
11/07/1997Coliform
11/05/1997Coliform
06/01/1999AA--WELL #1Sodium35
06/01/1999BA--WELL #3Sodium46
06/01/1999CA--WELL #4Sodium26
05/29/1996A--ENTRY POINT - WELL #1Sodium30.7
05/29/1996B--ENTRY POINT - WELL #3Sodium41.4
05/29/1996C--ENTRY POINT - WELL #4Sodium22.7
05/25/1993AA--WELL #1 - WELL #1Sodium26.1
05/25/1993BA--WELL #3 - WELL #3Sodium36.1
05/25/1993CA--WELL #4 - WELL #4Sodium21.4



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
DBPs :: TOC & Alkalinity :: DBP Sample Sites :: FANLs :: MRDL :: Turbidity :: SWTR :: RAA :: LRAA For SDWIS: 799