The U.S. EPA classifies lindane as a possible human carcinogen and it is particularly dangerous to the nervous and hormone systems. Lindane stays in the environment for a very long time and travels great distances in air and water currents. In fact, lindane shows up more often than any other pesticide in the arctic region especially in whales and people.
A single use of lindane shampoo can contaminate close to six million gallons of water. This threat to clean drinking water, and the enormous costs of clean-up, prompted California to ban lindane shampoos in 2002.
So using lindane to get rid of lice not only puts our children at risk, it also leads to serious and long-lasting environmental damage, and expensive water clean up costs.