Snohomish County annual BEACH report

We monitored seven beaches in Snohomish County weekly from May 20 – Aug. 30, 2019:

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

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.

From Memorial Day through Labor Day in 2019, we sampled 62 public high-use beaches statewide, either weekly or biweekly, for enterococcus, a type of fecal bacteria. High enterococcus levels are linked to swimmer illness.

Snohomish County saltwater swimming beaches

We monitored seven beaches in Snohomish County weekly from May 20 – Aug. 30, 2019.

Find details about each of the Snohomish County beaches 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 2019

Beach Geometric Mean Statistical Threshold Value
Edmonds Marina Beach Park 11 17
Edmonds Underwater Park 14 28
Howarth Park 11 15
Jetty Island <10 <10
Kayak Point County Park 14 30
Mukilteo Lighthouse Park 10 14
Picnic Point County Park 11 16