The Lake County Water Resources and Environmental Health departments, along with Big Valley Rancheria, have issued guidance to community members who draw their drinking water from Clear Lake in light of high cyanotoxin levels in the lake. with individual water systems around Sulphur Bank Mine and the shores of Clear Lake’s Lower and Oaks Arms should be particularly cautious, as recent lake monitoring data showed harmful concentrations of cyanotoxins. Find more information at lakecountyca.gov/1119/cyanobacteria.