MAPLE VALLEY, Wash. — A recent King County analysis of arsenic at the Cedar Hills Regional Landfill predicted arsenic emissions in a small area that extends into the community may exceed safe ...

The King County Council voted Wednesday to approve the expansion of Cedar Hills Regional Landfill, the county’s only active landfill, to allow operations to continue for up to another 20 years.

In September 2024, the Cedar Hills Landfill hosted one of its seasonal tours. The public is encouraged to register and see with their own eyes how the county’s waste management services operate ...

Back in the 1960s, King County established the Cedar Hills Regional Landfill about 20 miles southeast of Seattle, in an effort to make advances in converting waste to renewable natural gas.

PSCAA is now ordering the King County Solid Waste Division to test the Cedar Hills landfill for arsenic emissions in the air. The regulatory agency, which monitors air quality in King, Kitsap ...

King County’s Solid Waste Division issued a final Environmental Impact Statement for the Cedar Hills Regional Landfill 2020 site development plan and facilities relocation on March 22, ...

In September 2024, the Cedar Hills Landfill hosted one if its seasonal tours. The public is encouraged to register and see with their own eyes how the county’s waste management services operate ...