Snohomish County annual BEACH report

Washington State University (WSU) Snohomish County Extension Beach Watchers sampled six beaches in Snohomish County weekly or bi-weekly during the 2021 season. An additional beach, Kayak Point, was sampled weekly by Stillaguamish Tribe of Indians staff. 

  • Edmonds Marina Beach Park
  • Edmonds Underwater Park
  • Howarth Park
  • Kayak Point County Park
  • Mukilteo Lighthouse Park
  • Picnic Point County Park
  • Jetty Island

Mukilteo Lighthouse Park Beach in Snohomish County

Keeping beaches safe

The Beach Environmental Assessment, Communication & Health (BEACH) Program ensures that marine water is safe to swim and play in and informs the public if water doesn't meet swimming standards. Sampling takes place from Memorial Day to Labor Day. During this time, you can check out current water quality conditions on the swimming map.  

Six beaches in Snohomish County were monitored in 2021 by WSU Snohomish County Extension Beach Watchers. Beaches were monitored weekly, with the exception of Jetty Island, which was sampled four times. An additional beach, Kayak Point, was sampled weekly by Stillaguamish Tribe of Indians staff.

See details on each beach below.


Data summary: Bacteria results compared to standards

The chart below summarizes the bacteria levels at Snohomish County beaches in relation to the EPA swimming standard or saltwater swimming criteria. Beaches are considered unsafe for swimming when the geometric mean of enterococcus/100 mL of water is greater than or equal to 30 and the statistical threshold value of enterococcus/100 mL is greater than or equal to 110. We issue a public swimming advisory when enterococcus levels exceed 104 per 100 mL of water.

Table: Calculated geometric mean and statistical threshold value at Snohomish County beaches (in enterococcus per 100 mL) for 2021.

Beach

GM

STV

Edmonds Marina Beach Park

13

29

Edmonds Underwater Park

16

37

Howarth Park

31

141

Kayak Point County Park

17

49

Mukilteo Lighthouse Park

32

217

Picnic Point County Park

18

71

Jetty Island

10

15