The toxic algae blooms that kill aquatic life and degrade the water quality on the lake have grown, fed by phosphorus-laden runoff of rain and snowmelt from farms, roads and parking lots and discharges from municipal wastewater treatment plants. The U.S. Environmental Protection Agency this month set a new pollution reduction goal for the Vermont side of the Lake Champlain and state officials said they were already working on long-term plans to meet those goals by keeping pollutants from rivers and streams that feed the lake. The toxin it produces can cause vomiting, diarrhea or liver damage in extreme cases. The lost tax revenue — about $8,000 — "is not going to make us or break us" because of other property valuations and a tax increase, said Assistant Select Board Chairman Matt Crawford.