Mocrocks domoic acid levels

Visit the Mocrocks beach page for directions, harvest information, and more.

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 Beach, Twin Harbors, Copalis, Kalaloch, and Willapa Spits.

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)
9/9/2021 4
8/26/2021 10
8/18/2021 5
8/5/2021 6
7/27/2021 12
7/14/2021 11
6/29/2021 5
6/17/2021 14
6/2/2021 4
6/2/2021 7
6/2/2021 8
5/19/2021 9
5/19/2021 11
5/19/2021 13
5/10/2021 9
5/10/2021 9
5/10/2021 17
5/3/2021 12
5/3/2021 15
5/3/2021 19
4/26/2021 11
4/26/2021 12
4/26/2021 20
4/18/2021 1
4/18/2021 20
4/18/2021 27
4/7/2021 3
4/6/2021 12
4/6/2021 17
4/1/2021 10
4/1/2021 13
4/1/2021 19
3/24/2021 6
3/24/2021 11
3/24/2021 19
3/10/2021 19
2/23/2021 29
2/8/2021 19
2/8/2021 20
2/8/2021 34
1/28/2021 30
1/28/2021 33
1/28/2021 37
1/11/2021 25
1/11/2021 36
12/28/2020 17
12/12/2020 40
12/1/2020 28
11/16/2020 44
11/1/2020 11
10/28/2020 3
10/21/2020 3
10/8/2020 2
9/21/2020 2
9/10/2020 2
9/2/2020 2
8/23/2020 1
8/17/2020 2
8/8/2020 2
7/26/2020 1
6/28/2020 0.5
6/8/2020 1
5/27/2020 2
5/20/2020 1
5/14/2020 1
5/12/2020 1
4/29/2020 1
4/22/2020 1
4/12/2020 2
4/5/2020 3
3/29/2020 2
3/22/2020 3
3/11/2020 2
2/24/2020 1
2/12/2020 3
1/25/2020 2
1/13/2020 4
12/28/2019 4
12/15/2019 2
11/29/2019 3
11/21/2019 4
11/1/2019 3
10/15/2019 2
10/10/2019 2
9/30/2019 2
9/15/2019 2
8/19/2019 1
8/12/2019 2
8/1/2019 2
7/7/2019 3
6/2/2019 4
5/15/2019 4
5/8/2019 3
4/30/2019 3
4/11/2019 3
4/2/2019 5
3/27/2019 6
3/17/2019 5
3/8/2019 4
2/19/2019 3
2/5/2019 5
1/30/2019 5
1/21/2019 4
1/6/2019 4
12/22/2018 3
12/8/2018 3
11/25/2018 3
11/11/2018 2
10/29/2018 2
10/16/2018 2
10/3/2018 1
9/26/2018 1
9/10/2018 1
8/28/2018 1
7/26/2018 1
7/16/2018 1
6/25/2018 1
5/30/2018 5
5/21/2018 3
4/23/2018 3
4/11/2018 3
4/2/2018 5
3/21/2018 3
3/6/2018 3
2/26/2018 5
2/14/2018 8
2/12/2018 6
1/20/2018 6
1/14/2018 8
12/21/2017 6
12/13/2017 8
12/7/2017 8
11/20/2017 8
11/15/2017 5
11/7/2017 9
10/30/2017 8
10/24/2017 11
10/16/2017 6
10/9/2017 4
10/2/2017 3
9/25/2017 4
9/18/2017 7
9/11/2017 5
9/5/2017 10
8/29/2017 8
8/16/2017 6
8/8/2017 10
7/25/2017 11
7/11/2017 8
6/27/2017 15
5/15/2017 31
5/8/2017 26
5/2/2017 19
4/16/2017 4
4/9/2017 2
4/2/2017 2
3/25/2017 4
3/16/2017 3
2/27/2017 5
2/13/2017 6
1/30/2017 7
1/24/2017 5
1/15/2017 8
1/9/2017 6
12/26/2016 7
12/12/2016 9
12/4/2016 9
11/27/2016 4
11/13/2016 6
11/1/2016 7
10/26/2016 6
10/4/2016 5
9/27/2016 6
9/18/2016 6
9/14/2016 7
9/1/2016 2
8/15/2016 3
8/4/2016 3
7/25/2016 4
6/22/2016 3
5/24/2016 1
4/12/2016 2
3/28/2016 6
3/8/2016 7
2/23/2016 10
2/11/2016 17
2/4/2016 14
1/26/2016 21
1/20/2016 13
1/14/2016 21
1/7/2016 20
12/30/2015 18
12/15/2015 25
11/23/2015 24
10/27/2015 32
10/7/2015 30
9/27/2015 26
9/9/2015 40
9/1/2015 27
8/26/2015 30
8/11/2015 19
7/29/2015 46
7/15/2015 46
6/30/2015 62
6/23/2015 62
6/16/2015 70
6/1/2015 92
6/1/2015 92
5/27/2015 87
5/27/2015 87
5/18/2015 58
5/18/2015 58
5/11/2015 34
5/7/2015 14
5/4/2015 5
4/30/2015 2
4/22/2015 0.5
3/25/2015 0.5
3/9/2015 0.5
2/22/2015 0.5
2/18/2015 1
2/4/2015 1
1/20/2015 1
1/7/2015 1
12/22/2014 1
12/8/2014 0.1
12/3/2014 1
11/23/2014 1
11/18/2014 1
10/27/2014 1
9/23/2014 0.5
8/12/2014 1
7/27/2014 1
7/14/2014 2
6/25/2014 1
6/25/2014 1
6/10/2014 2
6/10/2014 2
5/19/2014 2
5/19/2014 2
5/13/2014 2
5/13/2014 2
5/4/2014 1
5/4/2014 1
4/25/2014 2
4/25/2014 2
4/21/2014 1
4/21/2014 1
4/15/2014 2
4/15/2014 2
4/7/2014 1
4/7/2014 1
4/1/2014 2
4/1/2014 2
3/19/2014 1
3/12/2014 2
2/27/2014 2
2/20/2014 2
2/1/2014 2
1/28/2014 4
1/21/2014 2
1/9/2014 2
12/18/2013 3
12/5/2013 6
11/21/2013 4
11/4/2013 3
10/9/2013 3
10/7/2013 2
9/28/2013 2
9/23/2013 1
9/23/2013 1
9/16/2013 3
9/16/2013 3
9/4/2013 2
8/28/2013 2
8/19/2013 2
7/11/2013 1
5/15/2013 0.1
5/1/2013 1
4/29/2013 1
4/29/2013 1
4/16/2013 0.5
4/1/2013 1
3/17/2013 0.5
2/27/2013 0.5
2/6/2013 1
1/29/2013 1
1/12/2013 1
1/9/2013 0.5
12/30/2012 1
12/14/2012 1
12/2/2012 1
11/17/2012 1
11/14/2012 1
11/4/2012 1
10/29/2012 2
10/14/2012 1
10/9/2012 1
10/9/2012 2
9/25/2012 2
9/10/2012 1
9/4/2012 1
8/28/2012 1
8/14/2012 0.1
7/31/2012 0.1
6/18/2012 0.5
5/8/2012 0.5
4/24/2012 0.5
3/14/2012 0.1
3/4/2012 0.1
2/9/2012 0.5
1/11/2012 0.5
12/12/2011 0.5
11/2/2011 0.5
10/20/2011 0.1
10/10/2011 0.1
10/7/2011 0.1
9/21/2011 0.1
8/15/2011 0.1
8/3/2011 0.1
6/22/2011 0.1
6/2/2011 0.1
5/19/2011 0.1
5/9/2011 0.1
5/8/2011 0.1
4/26/2011 0.1
4/18/2011 0.5
3/22/2011 0.1
3/9/2011 0.1
3/1/2011 0.5
2/4/2011 0.5
1/31/2011 0.1
1/23/2011 0.1
1/19/2011 0.1
12/21/2010 0.5
11/22/2010 0.5
11/18/2010 0.5
10/22/2010 0.1
10/19/2010 0.1
10/5/2010 0.1
9/30/2010 0.1
9/21/2010 1
9/3/2010 0.5
8/19/2010 1
8/8/2010 1
7/27/2010 1
7/11/2010 2
6/24/2010 2
6/13/2010 2
6/8/2010 1
5/31/2010 1
5/24/2010 1
5/10/2010 2
5/2/2010 1
4/11/2010 1
3/18/2010 2
3/9/2010 1
2/15/2010 2
2/9/2010 3
2/4/2010 2
1/29/2010 4
1/19/2010 2
12/20/2009 2
12/14/2009 2
11/22/2009 3
10/12/2009 5
10/4/2009 5
9/26/2009 6
9/14/2009 7
9/3/2009 7
8/24/2009 7
8/17/2009 4
8/10/2009 8
8/4/2009 5
7/21/2009 0.5
7/8/2009 0.5
6/22/2009 0.5
6/4/2009 0.5
5/27/2009 1
5/19/2009 1
4/30/2009 0.5
4/23/2009 1
4/19/2009 0.5
4/15/2009 0.5
3/22/2009 0.5
3/17/2009 0.5
3/9/2009 0.5
3/2/2009 0.1
2/23/2009 0.5
1/28/2009 0.5
1/21/2009 0.5
12/29/2008 0.1
12/8/2008 0.5
12/3/2008 0.5
11/23/2008 0.5
11/18/2008 0.5
11/11/2008 0.5
10/29/2008 0.5
10/15/2008 0.1
9/9/2008 0.1
9/1/2008 0.5
8/4/2008 0.5
7/8/2008 0.5
6/2/2008 0.5
5/19/2008 0.1
5/12/2008 0.5
4/27/2008 0.5
4/10/2008 0.5
4/1/2008 0.5
3/4/2008 0.5
2/3/2008 0.5
1/8/2008 0.5
12/10/2007 0.5
11/14/2007 0.5
11/7/2007 0.5
10/24/2007 0.5
10/16/2007 0.1
10/8/2007 0.5
9/23/2007 1
8/29/2007 1
8/27/2007 0.5
8/14/2007 0.1
7/26/2007 1
7/11/2007 0.5
6/19/2007 4
6/5/2007 3
5/9/2007 4
5/2/2007 3
4/24/2007 3
4/12/2007 3
4/4/2007 3
3/13/2007 4
3/7/2007 4
2/27/2007 4
2/13/2007 4
2/3/2007 4
1/28/2007 4
1/23/2007 5
1/15/2007 2
12/19/2006 3
12/10/2006 1
11/27/2006 1
11/20/2006 2
10/30/2006 3
10/22/2006 2
10/18/2006 2
10/10/2006 2
10/2/2006 3
9/25/2006 3
9/11/2006 4
8/30/2006 2
8/21/2006 7
6/8/2006 1
6/1/2006 2
5/18/2006 1
4/23/2006 1
4/14/2006 2
3/20/2006 1
3/13/2006 1
2/15/2006 1
2/8/2006 1
2/1/2006 0.1
1/17/2006 2
1/10/2006 3
12/19/2005 3
12/12/2005 5
11/6/2005 6
10/30/2005 4
10/9/2005 8
10/2/2005 6
9/29/2005 5
9/7/2005 3
8/29/2005 2
8/16/2005 2
7/20/2005 2
6/27/2005 2
5/30/2005 3
5/23/2005 4
5/15/2005 4
5/8/2005 7
5/1/2005 5
4/25/2005 4
4/19/2005 2
4/14/2005 1
3/31/2005 1
3/21/2005 1
2/24/2005 1
2/12/2005 2
1/26/2005 2
1/13/2005 4
12/28/2004 4
12/21/2004 2
12/1/2004 3
11/22/2004 3
11/3/2004 3
10/27/2004 2
10/25/2004 3
10/10/2004 2
10/3/2004 7
9/26/2004 3
9/13/2004 4
8/31/2004 5
8/18/2004 6
8/8/2004 5
5/6/2004 6
4/25/2004 9
4/14/2004 4
4/6/2004 2
4/1/2004 3
3/23/2004 10
3/10/2004 13
3/1/2004 4
2/15/2004 6
2/9/2004 18
2/1/2004 11
1/11/2004 2
1/4/2004 8
12/27/2003 11
12/13/2003 10
12/9/2003 9
11/30/2003 12
11/23/2003 12
11/4/2003 14
10/20/2003 12
10/13/2003 14
10/7/2003 12
9/29/2003 20
9/22/2003 26
9/15/2003 15
9/8/2003 37
9/1/2003 17
8/25/2003 20
8/11/2003 12
7/21/2003 24
5/5/2003 43
4/21/2003 65
4/7/2003 45
3/24/2003 66
3/17/2003 62
2/27/2003 63
2/13/2003 108
1/27/2003 75
1/16/2003 107
12/30/2002 91
12/18/2002 114
12/2/2002 118
11/18/2002 112
11/4/2002 147
10/21/2002 188
10/6/2002 45
9/30/2002 25
8/27/2002 1
5/12/2002 1
4/20/2002 1
3/24/2002 2
2/21/2002 1
1/9/2002 2
12/6/2001 3
11/7/2001 2
10/2/2001 4
9/5/2001 52
8/23/2001 4
7/27/2001 3
6/20/2001 3
5/12/2001 10
4/12/2001 14
3/3/2001 12
2/4/2001 2
1/24/2001 4
12/1/2000 8
11/9/2000 6
10/14/2000 8
9/13/2000 8
8/16/2000 2
7/5/2000 4
5/17/2000 6
4/2/2000 3
3/22/2000 1
2/4/2000 2
1/7/2000 5
12/7/1999 4
11/13/1999 7
10/14/1999 10
9/22/1999 8
8/11/1999 11
7/15/1999 15
6/2/1999 24
5/17/1999 18
4/2/1999 30
3/15/1999 20
2/19/1999 39
1/4/1999 80