News and Highlights: 2006 - Oregon Department of Fish and Wildlife:

Domoic acid levels close Clatsop Beach to razor clamming

Date:July 13, 2006
ASTORIA State fishery and agricultural officials today announced that Clatsop Beach is closed to razor clamming effective immediately.
The closure is due to recent testing of domoic acid levels by the Oregon Department of Agriculture which revealed amounts above the 20 parts per million (ppm) level that triggers a closure. Domoic acid is a natural toxin produced by algae blooms that can remain in razor clams' edible tissues for many months before being purged.