Washington Dept. of Fish and Wildlife RAZOR CLAMS
* Introduction
* Regulations
* Clam Population Sampling
* Domoic Acid
* Recreational Fishery
* How to Dig
Razor Clams
* How to Prevent Wastage

Domoic Acid Levels: Twin Harbors 1996-2007

Back to Current Domoic Acid Levels

Long Beach Twin Harbors Copalis Mocrocks Kalaloch Willapa Spits

1996-1999
Sample
Date
Level
(ppm)
6/09/96
 3.0
12/11/96
 2.0
4/05/97
 1.0
10/1/97
0.0
1/15/98
0.0
6/12/98
0.0
7/29/98
 9.0
8/11/98
 8.0
9/04/98
 12.0
9/21/98
47.0
10/05/98
107.0
10/19/98
 108.0
11/02/98
 81.0
11/18/98
 100.0
12/03/98
 48.0
12/17/98
 51.0
1/04/99
 48.0
1/18/99
 27.0
2/01/99
 48.0
2/18/99
 52.0
3/01/99
 48.0
3/15/99
 40.0
4/02/99
 36.0
5/17/99
 22.0
6/15/99
 10.0
7/19/99
 9.0
8/11/99
 21.0
9/23/99
 13.0
10/06/99
 11.0
10/13/99
 6.0
10/24/99
 22.0
10/31/99
 7.0
11/07/99
 15.0
11/10/99
 15.0
11/13/99
 16.0
11/21/99
 10.0
12/05/99
 6.0
12/12/99
 5.0
12/19/99
 7.0
200-2001
Sample
Date
Level
(ppm)
1/17/2000
 6.0
2/15/2000
 19.0
3/22/2000
 4.0
4/03/2000
 3.0
4/12/2000
 5.0
6/08/2000
 10.0
7/16/2000
 5.0
8/16/2000
 2.0
9/12/2000
 2.0
9/25/2000
 5.0
10/11/2000
 4.0
10/14/2000
 3.0
10/20/2000
 4.0
11/01/2000
 3.0
11/16/2000
 5.0
11/30/2000
 4.0
1/24/2001
 3.0
2/04/2001
 3.0
3/11/2001
 24.0
4/12/2001
 18.0
4/22/2001
 20.0
4/30/2001
 19.0
5/07/2001
 19.0
6/11/2001
 10.0
7/25/2001
 7.0
8/16/2001
 5.0
8/30/2001
 8.0
9/11/2001
 8.0
9/18/2001
 9.0
10/04/2001
 5.0
10/10/2001
 6.0
10/30/2001
 5.0
11/07/2001
 4.0
12/06/2001
 5.0
12/17/2001
 4.0
12/26/2001
 2.0
2002-2003
Sample
Date
Level
(ppm)
1/14/02
3.0
1/24/02
5.0
2/21/02
2.0
3/24/02
3.0
4/21/02
4.0
5/06/02
4.0
6/17/02
2.0
7/14/02
3.0
9/30/02
16.0
10/06/02
60.0
10/21/02
113.0
11/04/02
52.0

11/18/02

48.0
12/02/02
70.0
12/17/02
63.0
12/30/02
44.0
1/16/03
60.0
1/28/03
59.0
2/13/03
61.0
2/27/03
69.0
3/24/03
63.0
4/07/03
22.0
4/14/03
36.0
4/21/03
32.0
5/05/03
38.0
5/20/03
29.0
6/01/03
33.0
6/16/03
 15.0
7/01/03
 27.0

7/15/03

10.0

8/11/03

17.0

8/25/03

17.0

9/03/03

19.0

9/08/03

21.0

9/15/03

12.02

9/22/03

9.0

9/29/03

18.0

10/06/03

9.0

10/13/03

10.0

10/20/03

5.0

11/12/03

2.0

11/23/03

4.0

12/08/03

7.0

12/14/03

12.0

12/23/03

4.0
2004
Sample
Date
Level
(ppm)

1/04/04

11.0

1/11/04

17.0

1/18/04

16.0

2/03/04

10.0

2/09/04

14.0

2/15/04

5.0

3/10/04

10.0

3/22/04

8.0

4/05/04

5.0

4/14/04

6.0

4/25/04

5.0

5/02/04

3.0

5/03/04

3.0
5/18/04
4.0
6/21/04
2.0
7/06/04
1.0
7/20/04
1.0
8/04/04
8.0
8/09/04
7.0
8/30/04
3.0
9/13/04
5.0
9/27/04
4.0
10/03/04
5.0
10/11/04
5.0
10/27/04
5.0
11/03/04
4.0
11/23/04
5.0
12/01/04
5.0
12/21/04
4.0
12/28/04
7.0
2005
Sample
Date
Level
(ppm)
1/13/05
6.0
1/26/05
6.0
2/12/05
5.0
2/24/05
3.0
3/06/05
2.0
3/23/05
9.0
3/31/05
3.0
4/14/05
3.0
4/20/05
9.0
4/21/05
6.0
4/23/05
12.0
5/01/05
18.0
5/02/05
10.0
5/06/05
8.0
5/27/05
5.0
6/09/05
5.0
7/11/05
6.0
7/28/05
2.0
8/09/05
4.0
8/22/05
2.0
9/06/05
6.0
9/19/05
2.0
10/02/05
9.0
10/09/05
11.0
10/09/05
11.0
11/06/05
9.0
12/12/05
3.0
12/19/05
1.0
2006
Sample
Date
Level
(ppm)
1/10/06
1.0
1/17/06
1.0
1/30/06
2.0
2/08/06
5.0
2/15/06
4.0
3/13/06
1.0
3/20/06
2.0
4/14/06
2.0
4/23/06
4.0
5/15/06
4.0
5/30/06
2.0
6/12/06
2.0
6/30/06
2.0
7/11/06
4.0
7/17/06
3.0
7/24/06
5.0
7/31/06
3.0
8/14/06
5.0
8/28/06
3.0
9/11/06
2.0
9/25/06
2.0
10/02/06
2.0
10/22/06
1.0
10/30/06
1.0
11/20/06
2.0
11/27/06
2.0
12/18/06
2.0
2007
Sample
Date
Level
(ppm)
12/18/06
2.0
1/15/07
1.0
1/28/07
4.0
2/03/07
4.0
2/28/07
4.0
3/07/07
4.0
4/04/07
3.0
4/12/07
3.0
4/26/07
3.0
5/04/07
4.0
5/21/07
3.0
6/12/07
3.0
6/18/07
4.0
7/03/07
1.0
7/30/07
1.0
8/13/07
NTD
8/27/07
1.0
9/25/07
<1.0
10/08/07
<1.0
10/16/07
<1.0
11/07/07
<1.0
11/14/07
<1.0
     

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