King County annual BEACH report

We monitored 10 beaches in King County from Memorial Day to Labor Day in 2021:

  • Alki Beach Park
  • Carkeek Park Beach
  • Dash Point State Park
  • Golden Gardens
  • Lincoln Park
  • Redondo County Park
  • Richey Viewpoint
  • Richmond Beach Saltwater Park
  • Saltwater State Park
  • Seahurst Park

Golden Gardens beach in King 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.  

Public Health – Seattle & King County sampled ten beaches weekly or biweekly in King County during the 2021 season.

See details on each beach below.


Data summary: Bacteria results compared to standards

The chart below summarizes the bacteria levels at King 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  King County beaches (in enterococcus per 100 mL) for 2021.

Beach

GM

STV

Alki Beach Park

20

58

Carkeek Park

27

340

Dash Point State Park

11

17

Golden Gardens

24

151

Lincoln Park

19

47

Redondo County Park

16

42

Richey Viewpoint

24

47

Richmond Beach Saltwater Park

13

23

Saltwater State Park

21

73

Seahurst Park

17

35