The Washington Dept. of Ecology completed the final environmental assessment of a proposal to use the pesticide imidacloprid to control burrowing shrimp.

Click on the words above “The Washington Dept. of Ecology completed the final…” to see this entire post.

The supplemental environmental review found:


  • Significant impacts to sediment quality and benthic invertebrates.
  • Adverse impacts to juvenile worms and crustaceans in the areas treated with imidacloprid and the nearby areas covered by incoming tides.
  • Concern about non-lethal impacts to invertebrates in the water column and sediment.
  • New information shows a risk of impacts from imidacloprid even at low concentrations.
  • Likely indirect impacts to fish and birds if food sources are disrupted.
  • Little known direct risk to fish, birds, marine mammals, and human health.
  • Increased uncertainty about long-term, non-lethal, and cumulative impacts.
  • Continued knowledge gaps about imidacloprid.

Read more here.

This matters to everyone, not just Washingtonians. Nearly a quarter of the oysters grown in the US are grown in Willapa Bay and Grays Harbor.

These oysters are shipped all over, including to growers on Tomales Bay.

Read more about imidacloprid, the neurotoxin Washington growers want to spray in local waters to kill native shrimp here.

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