Snohomish County annual BEACH report

We monitored seven beaches in Snohomish County weekly from May 21 – Aug. 31, 2018:

  • 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 2018, 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 21 – Aug. 31, 2018.

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 35 and the statistical threshold value of enterococcus/100 mL is greater than or equal to 276. We issue a public swimming advisory when enterococcus levels reach 104 per 100 mL of water.

Table: Calculated geometric mean and statistical threshold value at Snohomish County beaches (in enterococcus per 100 mL) for 2018

Beach Geometric Mean Statistical Threshold Value
Edmonds Marina Beach Park 13 24
Edmonds Underwater Park 11 18
Howarth Park 14 32
Jetty Island 13 26
Kayak Point County Park 21 139
Mukilteo Lighthouse Park 13 26
Picnic Point County Park 12 19