Last September 2021, unsafe levels of anatoxin-a were found in Pass Lake’s water in Deception Pass State Park.
 
After months of rehabilitation, Pass Lake in Deception Pass State Park is now safe for anglers.

The toxin called anatoxin-a is found in blue green algae and an excess of it makes water levels unfit for use in leisure activities within the Deception Pass State Park.

After great effort from the park staff via modifications and improvement in water flow, it has now been tested at only 0.182 micrograms per liter.

As such, Pass Lake’s water is now considered safe to use for fishing and paddling.