The Hercules outfall canal into Brunswick’s Terry Creek made the Georgia Water Coalition’s Dirty Dozen list this year. The Coalition said the EPA’s approved clean up plan may leave nearby residents at continued exposure risk to toxic chemicals. From 1948 to 1980, Hercules Inc. produced a pesticide marketed as toxaphene. The poison was later found to be toxic to humans as well as insects. A known cancer-causing chemical, it persists in the environment for decades. The U.S. banned its production in the 1980s. In Brunswick 2.5 million pounds of pesticide manufacturing wastes was released into the marsh through the outfall ditch.