A dark brown plume of sewage spread along the shoreline of Lake Sammamish after a sewer overflow on Sunday, April 12, turning a normally busy stretch of water into something boaters wanted no part of. Video posted online showed discolored water and floating debris drifting near the shore, rattling boaters and park users who watched it fan out along the lake.
In short order, Bellevue officials and public-health authorities told beachgoers, boaters and pet owners to steer clear of the impacted area. The city’s advisory covers the 200 block of W Lake Sammamish Parkway and is set to remain in effect through Sunday, April 19 at 10:15 a.m.
Footage of the overflow, shared by KIRO 7 News, shows a murky plume hugging the nearshore. According to the City of Bellevue’s utilities page, the overflow occurred in the 200 block of W Lake Sammamish Parkway, and Public Health – Seattle & King County advised that people and pets avoid the mapped area until April 19 at 10:15 a.m.
County Monitoring And Water-Quality Context
King County runs a long-term monitoring program on Lake Sammamish, using mid-lake sampling stations to track water clarity, chlorophyll and other key indicators. As outlined by King County, the lake is heavily used for recreation and is routinely tested so officials can spot contamination events like this and issue timely public warnings.
Health Advice For People And Pets
The City of Bellevue, relaying guidance from public-health officials, is blunt about what comes next. The advisory states, “Humans and pets should stay out of the water,” and recommends that anyone who had direct contact with lake water before the notice should shower and keep an eye out for symptoms…