A recent study by King County scientists revealed that Lake Washington’s water quality has improved significantly from 1998 to 2022, despite a population increase of over 350,000 in the surrounding area. Key findings include a 50% decrease in spring algae blooms and a 3-foot increase in summer underwater visibility. Experts attribute these improvements to various environmental protections, such as stormwater management and transitioning from septic systems to regional sewers. King County Executive Girmay Zahilay praised community efforts and emphasized the importance of ongoing initiatives to protect the lake, which serves as a vital resource for many.
