OHA Drinking Water Services
PWS ID: 90872 ---- NORTHWEST ALUMINUM COMPANY ---- INACTIVE
Lead & Copper Summary Results

Lead and Copper Compliance Actions
  • No lead and copper schedules found.


  • Lead and copper results shown are the 90th percentile summary results. See all detailed results.
    Consumer notice date is the date water customers were notified of their tap results. Consumer notice records are not available prior to 2016.

    Action Levels:  Lead = 0.015 mg/L;  Copper = 1.3 mg/L. Action level exceedances are indicated with bold red text.

    Sample Dates Date
    Received
    Sample
    Count
    Duration Lead
    (mg/L)
    Copper
    (mg/L)
    Consumer
    Notice Date
    Dec 03, 2020 - Dec 03, 2020 Dec 22, 2020 5 6M 0.0001 0.0000
    May 20, 2020 - May 20, 2020 Jun 02, 2020 5 6M 0.0000 0.0011
    Sep 18, 2019 - Sep 18, 2019 Oct 01, 2019 5 3Y 0.0007 0.0040
    Sep 07, 2016 - Sep 30, 2016 Oct 21, 2016 10 3Y 0.0046 0.0071
    Sep 26, 2013 - Sep 26, 2013 Oct 03, 2013 5 3Y 0.0000 0.0120
    Sep 15, 2010 - Sep 15, 2010 Oct 12, 2010 5 3Y 0.0000 0.0093
    Aug 16, 2006 - Sep 27, 2006 Oct 04, 2006 5 3Y 0.0000 0.0320
    Nov 26, 2002 - Jun 10, 2003 Jun 16, 2003 5 3Y 0.0085 0.9250
    Jan 01, 1999 - May 27, 1999 Oct 18, 1999 5 3Y 0.0008 0.0072
    Jan 01, 1996 - Jul 16, 1998 Jul 30, 1998 5 3Y 0.0004 0.0230
    Jan 01, 1997 - Jun 12, 1997 Aug 07, 1997 5 YR 0.0000 0.0200
    Jan 01, 1996 - Jun 13, 1996 Jul 12, 1996 5 YR 0.0000 0.0520
    Jan 01, 1995 - Jun 14, 1995 Jul 05, 1995 5 YR 0.0040 0.0025
    Jan 01, 1994 - Apr 12, 1994 May 09, 1994 10 6M 0.0009 0.0170
    Jul 01, 1993 - Aug 04, 1993 Oct 19, 1993 10 6M 0.0000 0.0790



    More information for this water system: SDWIS ID 799
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