Jefferson County annual BEACH report

We monitored four beaches in Jefferson County from May 20 through Aug. 30, 2019:

  • Chetzemoka Park
  • Fort Worden State Park
  • Herb Beck Marina
  • Oak Bay County Park

Beach at Fort Worden State Park 

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.

Jefferson County saltwater swimming beaches

We monitored four beaches in Jefferson County weekly from May 20 – Aug. 30, 2019.

Find details about each of the Jefferson County beaches below:


Data summary: Bacteria results compared to standards

The chart below summarizes the bacteria levels at Jefferson 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 Jefferson County beaches
(in enterococcus per 100 mL) for 2019

Beach Geometric Mean Statistical Threshold Value
Chetzemoka Park 11 16
Fort Worden State Park 19 55
Herb Beck Marina 21 91
Oak Bay County Park 19 226