Spokane Regional Health District (SRHD) issued a harmful algae bloom (HAB) alert for West Medical Lake on August 2, 2026, after tests showed toxic cyanobacteria levels.
SRHD advises against all recreation at the lake until further notice, citing potential health risks including rashes, diarrhea, and liver issues from exposure or ingestion. The alert will remain in place until testing confirms toxin levels are safe, with weekly monitoring continuing. Signs at the lake will be updated once levels are acceptable.
Residents are urged to avoid stagnant water, dead fish, or algae-heavy areas, and to report suspected blooms via the Washington State Toxic Algae website.