Willapa Spits domoic acid levels

The sand spits in Willapa Bay are referred to as the Willapa Spits and are used for commercial harvest.

Domoic acid, a naturally occurring toxin produced by certain types of algae, can be harmful or even fatal to humans if contaminated shellfish is consumed.  The Washington Department of Fish and Wildlife (WDFW) routinely provides razor clams from various ocean beaches to the Washington Department of Health to test for domoic acid. State public health officials have set the maximum threshold for domoic acid levels in razor clams at 20 parts per million.

See domoic acid levels at Long BeachTwin HarborsCopalisMocrocks, and Kalaloch.

On desktop/laptop, move the cursor over a data point to see the exact date and level. To zoom in or out on the chart, use the mouse scroll wheel. Click and drag the graph to pan the data left or right.

On touch devices, tap the data point to see the exact date and level. To zoom in or out on the chart, spread or pinch the chart area. Tap and drag the graph to pan the data left or right.
All domoic acid readings in ascending order of sample date
Sample Date Level (ppm)
9/2/2021 12
8/16/2021 9
8/3/2021 7
7/20/2021 8
6/29/2021 11
6/29/2021 12
6/22/2021 11
6/22/2021 16
6/8/2021 13
6/8/2021 28
6/1/2021 17
6/1/2021 19
5/24/2021 12
5/24/2021 21
5/17/2021 12
5/17/2021 18
5/10/2021 14
5/10/2021 24
4/28/2021 17
4/21/2021 22
4/14/2021 15
4/13/2021 28
4/13/2021 30
4/6/2021 16
3/23/2021 27
3/9/2021 28
7/13/2020 2
6/30/2020 2
6/1/2020 2
5/19/2020 2
5/4/2020 4
4/25/2020 4
4/5/2020 2
3/10/2020 4
6/3/2019 2
5/16/2019 4
4/24/2019 3
4/9/2019 4
3/20/2019 5
3/4/2019 6
7/10/2018 2
6/25/2018 3
6/11/2018 3
5/29/2018 4
5/15/2018 3
4/23/2018 5
4/3/2018 5
3/20/2018 3
3/20/2018 7
3/13/2018 6
3/13/2018 7
3/7/2018 6
3/7/2018 6
2/27/2018 10
2/13/2018 6
2/13/2018 10
2/13/2018 12
8/7/2017 6
8/7/2017 6
8/7/2017 23
7/26/2017 9
7/26/2017 10
6/12/2017 17
6/12/2017 25
6/12/2017 34
5/31/2017 18
4/30/2017 37
4/30/2017 41
4/30/2017 44
4/1/2017 12
4/1/2017 14
4/1/2017 32
3/8/2017 19
3/8/2017 28
3/8/2017 36
2/7/2017 52
7/20/2016 7
7/20/2016 10
7/20/2016 14
7/20/2016 14
6/8/2016 7
6/8/2016 7
6/8/2016 14
6/8/2016 19
5/11/2016 14
5/11/2016 14
5/11/2016 22
5/11/2016 31
4/10/2016 14
4/10/2016 27
4/10/2016 27
4/10/2016 36
3/20/2016 30
3/11/2016 17
2/24/2016 16
2/10/2016 33
9/14/2015 34
9/2/2015 33
8/18/2015 35
8/5/2015 56
7/22/2015 96
7/7/2015 43
6/16/2015 134
6/4/2015 70
5/26/2015 138
5/18/2015 69
5/11/2015 41
5/7/2015 26
5/3/2015 8
4/22/2015 1
4/14/2015 1
4/4/2015 0.1
3/23/2015 1
3/16/2015 1
6/25/2014 3
6/17/2014 2
6/11/2014 3
6/4/2014 3
5/29/2014 4
5/21/2014 3
5/14/2014 3
5/8/2014 2
5/1/2014 1
4/22/2014 4
4/14/2014 4
7/7/2013 1
6/27/2013 1
6/20/2013 1
6/12/2013 1
6/5/2013 1
5/29/2013 1
5/22/2013 1
5/15/2013 1
5/8/2013 1
5/1/2013 1
4/24/2013 1
4/15/2013 1
7/2/2012 1
6/25/2012 1
6/18/2012 0.1
6/11/2012 1
6/4/2012 0.1
5/28/2012 1
5/22/2012 1
5/14/2012 1
5/7/2012 1
5/1/2012 0.1
4/24/2012 0.1
4/13/2012 1
7/12/2011 1
7/5/2011 1
6/28/2011 1
6/20/2011 1
6/14/2011 1
6/7/2011 0.1
5/31/2011 0.1
5/23/2011 1
5/16/2011 1
5/9/2011 1
5/2/2011 1
4/11/2011 1
7/12/2010 1
7/6/2010 1
6/30/2010 1
6/22/2010 1
6/14/2010 2
6/8/2010 1
6/1/2010 2
5/25/2010 2
5/18/2010 1
5/10/2010 1
5/4/2010 1
4/27/2010 1
4/14/2010 1
6/22/2009 1
6/15/2009 1
6/8/2009 2
6/1/2009 2
5/26/2009 2
5/18/2009 1
5/11/2009 2
4/30/2009 1
4/23/2009 2
6/25/2008 1
6/17/2008 1
6/4/2008 1
5/27/2008 1
5/19/2008 1
5/12/2008 1
5/4/2008 1
4/21/2008 1
6/20/2007 1
6/14/2007 3
6/6/2007 5
5/31/2007 5
5/23/2007 5
5/15/2007 4
5/7/2007 4
4/30/2007 4
4/30/2007 5
4/30/2007 5
4/23/2007 4
4/23/2007 4
4/23/2007 5
7/7/2006 5
6/22/2006 3
6/15/2006 4
6/8/2006 2
6/1/2006 3
5/25/2006 4
5/18/2006 4
5/11/2006 4
5/3/2006 4
5/3/2006 5
5/3/2006 6
4/24/2006 3
4/24/2006 5
4/24/2006 7
8/17/2005 5
8/8/2005 7
8/1/2005 3
7/25/2005 5
7/18/2005 9
7/9/2005 10
7/9/2005 10
6/28/2005 12
6/28/2005 15
6/28/2005 15
6/22/2005 7
6/22/2005 10
6/21/2005 9
5/23/2005 8
5/23/2005 23
5/23/2005 29
5/12/2005 13
5/12/2005 16
5/12/2005 19
5/6/2005 14
5/6/2005 22
5/6/2005 25
8/20/2004 8
8/13/2004 6
8/5/2004 7
7/30/2004 5
7/22/2004 1
7/22/2004 1
7/15/2004 2
7/15/2004 5
6/21/2004 4
6/10/2004 3
6/3/2004 3
5/26/2004 5
5/20/2004 4
5/12/2004 3
5/12/2004 3
5/12/2004 8
5/4/2004 3
5/4/2004 3
5/4/2004 6
9/1/2003 13
9/1/2003 17
8/31/2003 16
8/24/2003 10
8/24/2003 12
8/24/2003 18
8/11/2003 8
8/11/2003 15
8/11/2003 19
8/9/2003 12
8/9/2003 13
8/9/2003 21
8/1/2003 3
8/1/2003 5
8/1/2003 7
7/16/2003 1
7/16/2003 1
7/16/2003 2
5/8/2003 33
5/8/2003 44
5/8/2003 88
6/25/2002 4
6/17/2002 4
6/8/2002 4
6/8/2002 5
5/28/2002 4
5/28/2002 8
5/20/2002 3
5/20/2002 6
5/12/2002 4
5/12/2002 4
5/7/2002 3
5/7/2002 5
5/7/2002 11
4/26/2002 6
4/26/2002 6
4/26/2002 6
8/24/2001 12
8/24/2001 13
8/23/2001 11
8/13/2001 7
8/13/2001 10
8/12/2001 5
8/4/2001 7
8/4/2001 8
8/4/2001 8
7/26/2001 2
7/26/2001 2
7/26/2001 6
7/19/2001 3
7/19/2001 6
7/19/2001 10
7/12/2001 6
7/12/2001 11
7/12/2001 19
7/6/2001 8
7/6/2001 10
7/6/2001 16
6/27/2001 13
6/27/2001 14
6/27/2001 22
6/19/2001 5
6/19/2001 15
6/19/2001 19
6/12/2001 6
6/12/2001 11
6/12/2001 15
6/6/2001 7
6/6/2001 16
6/6/2001 20
5/30/2001 12
5/30/2001 14
5/30/2001 18
5/1/2001 13
5/1/2001 19
5/1/2001 30
4/10/2001 18
4/10/2001 26
4/10/2001 28
7/13/2000 3
7/13/2000 3
7/13/2000 4
7/5/2000 3
7/5/2000 3
7/5/2000 4
6/29/2000 3
6/29/2000 4
6/29/2000 4
6/21/2000 5
6/21/2000 7
6/21/2000 9
6/15/2000 5
6/15/2000 7
6/15/2000 9
6/8/2000 8
6/8/2000 9
6/8/2000 11
6/3/2000 7
6/3/2000 9
6/3/2000 16
5/24/2000 7
5/24/2000 8
5/24/2000 8
5/16/2000 7
5/16/2000 7
5/16/2000 9
5/11/2000 8
5/11/2000 9
5/9/2000 7
5/9/2000 13
5/1/2000 8
5/1/2000 9
5/1/2000 11
4/10/2000 6
4/10/2000 8
4/10/2000 11
6/16/1999 0.1
6/16/1999 1
5/12/1998 0.1
4/28/1998 0.1
4/13/1998 0.1
4/3/1998 0.1
4/3/1998 0.1
3/27/1998 0.1
3/27/1998 0.1
5/12/1997 1
5/12/1997 1
5/12/1997 2
5/5/1997 0.1
5/5/1997 1
5/5/1997 2
4/23/1997 0.1
4/23/1997 1
4/23/1997 1
4/14/1997 1
4/14/1997 1
4/14/1997 2
4/5/1997 1
4/5/1997 2
4/5/1997 3
7/5/1996 1
7/5/1996 2
7/5/1996 2
6/28/1996 2
6/28/1996 2
6/28/1996 3
6/15/1996 2
6/15/1996 2
6/15/1996 3
6/6/1996 5
6/6/1996 6
6/6/1996 6
5/29/1996 4
5/29/1996 4
5/29/1996 5
5/19/1996 3
5/19/1996 4
5/19/1996 5
7/24/1995 5
7/24/1995 6
7/24/1995 6
7/16/1995 4
7/16/1995 5
7/16/1995 5
7/1/1995 5
7/1/1995 5
7/1/1995 8
6/18/1995 8
6/18/1995 8
6/18/1995 10
6/11/1995 7
6/11/1995 8
6/11/1995 9
5/29/1995 6
5/29/1995 6
5/29/1995 11
5/16/1995 14
5/16/1995 15
5/16/1995 16
8/8/1994 1
8/8/1994 2
8/8/1994 2
8/3/1994 2
8/3/1994 3
8/3/1994 4
7/24/1994 2
7/24/1994 4
7/24/1994 4
7/18/1994 6
7/18/1994 6
7/18/1994 7
7/13/1994 5
7/13/1994 6
7/13/1994 7
6/29/1994 4
6/29/1994 6
6/29/1994 6
4/6/1992 20
4/6/1992 47
3/9/1992 21