 Senior staff who helped organize the Environmental Protection Agency in 1970 recall that International Paper was one of the first companies to call upon the brand new agency, because it was being pushed by both New York and Vermont with regard to a discharge of pollution into Lake Champlain.Agricultural and urban runoff from the watershed or drainage basin is the primary source of excess phosphorus, which exacerbates algae blooms in Lake Champlain.The most problematic blooms have been cyanobacteria, commonly called blue-green algae, in the northeastern part of the Lake, primarily Missisquoi Bay.