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 unsafe level for domoic acid in razor clams at 20 parts per million and above.

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.

Show last 12 mos. Show historical data

All domoic acid readings in descending order of sample date
Sample Date	Level (ppm)
12/16/2024	2
12/2/2024	1
11/18/2024	2
11/5/2024	2
10/21/2024	2
10/7/2024	2
10/1/2024	2
9/24/2024	2
9/12/2024	2
9/5/2024	3
8/28/2024	4
8/22/2024	3
8/14/2024	2
8/7/2024	4
7/25/2024	7
7/9/2024	4
6/27/2024	4
6/11/2024	4
6/6/2024	4
6/2/2024	4
5/27/2024	8
5/13/2024	7
5/1/2024	4
4/27/2024	7
4/13/2024	5
3/31/2024	4
3/18/2024	6
2/24/2024	5
2/12/2024	5
1/28/2024	8
1/15/2024	5
12/29/2023	10
12/17/2023	8
11/30/2023	9
11/17/2023	8
11/3/2023	11
10/23/2023	12
10/8/2023	11
10/8/2023	12
10/8/2023	12
10/1/2023	9
10/1/2023	16
10/1/2023	17
9/24/2023	9
9/24/2023	20
9/24/2023	21
9/14/2023	15
9/14/2023	16
9/14/2023	17
9/3/2023	16
9/3/2023	18
9/3/2023	20
8/28/2023	10
8/28/2023	14
8/28/2023	15
8/19/2023	20
8/19/2023	24
8/19/2023	24
8/14/2023	17
8/3/2023	30
7/21/2023	4
7/4/2023	5
6/22/2023	8
6/1/2023	7
5/23/2023	5
5/14/2023	8
4/26/2023	5
4/12/2023	8
3/31/2023	7
3/12/2023	11
2/24/2023	18
2/15/2023	18
2/1/2023	17
2/1/2023	18
2/1/2023	19
1/26/2023	15
1/26/2023	16
1/25/2023	14
1/19/2023	13
1/19/2023	14
1/19/2023	26
1/4/2023	17
1/4/2023	20
1/4/2023	20
12/19/2022	22
12/19/2022	23
12/19/2022	28
12/4/2022	19
12/4/2022	21
12/4/2022	23
11/21/2022	20
11/21/2022	25
11/21/2022	26
11/14/2022	24
11/14/2022	26
11/14/2022	26
11/6/2022	17
11/6/2022	18
11/6/2022	19
11/1/2022	16
11/1/2022	16
11/1/2022	20
10/18/2022	12
10/18/2022	13
10/18/2022	17
10/13/2022	7
10/13/2022	12
10/13/2022	20
10/4/2022	13
10/4/2022	16
10/4/2022	19
9/25/2022	18
9/25/2022	19
9/25/2022	22
9/14/2022	17
9/14/2022	21
9/14/2022	22
9/5/2022	11
9/5/2022	14
9/5/2022	15
8/30/2022	19
8/22/2022	10
8/22/2022	12
8/22/2022	13
8/14/2022	16
8/8/2022	13
8/1/2022	11
7/18/2022	0.5
6/29/2022	0.5
6/20/2022	1
6/1/2022	1
5/18/2022	1
5/4/2022	0.5
4/19/2022	1
4/6/2022	3
3/22/2022	1
3/3/2022	1
2/16/2022	8
2/2/2022	3
1/19/2022	2
1/4/2022	4
12/19/2021	2
12/5/2021	3
11/21/2021	2
11/6/2021	3
10/23/2021	2
10/10/2021	4
9/25/2021	5
9/21/2021	5
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