King County BEACH report
We sampled 10 beaches weekly or biweekly in King County during the 2025 monitoring season:
- 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
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 and the Department of Ecology sampled 10 beaches weekly or bi-weekly in King County during the 2025 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 2025.
| Beach | GM | STV |
|---|---|---|
| Alki Beach Park | 13 | 19 |
| Carkeek Park | 11 | 14 |
| Dash Point State Park | 12 | 24 |
| Golden Gardens | 10 | 16 |
| Lincoln Park | 14 | 25 |
| Redondo County Park | 14 | 23 |
| Richey Viewpoint | 13 | 26 |
| Richmond Beach Saltwater Park | 12 | 32 |
| Saltwater State Park | 18 | 108 |
| Seahurst Park | 12 | 26 |
Contact information
Contact BEACH: Reach BEACH staff, sign up for our email list, or follow us on social media platforms.