No, the lake is spring fed and doesn't stay cold enough, so cyanobacteria is a problem. Before regulations locked things down, people bought land and built homes right up against the edge of the lake. Many of the houses are little fishing shacks, probably built in the 50s. The septic systems are most likely grandfathered in. The lake is being monitored/studied by the state university, hopefully they'll figure out the source of the issues. I would not recommend swimming there, feels like swimming in warm bathwater mid summer.