Safe disposal of gasoline varies among states and municipalities; at a minimum, people should place gasoline in sealed, labeled containers and check with local recycling, waste management or environmental service companies to dispose of gas in safe and legal manners. The best way to get rid of old gasoline is to use it for cars and other gas-powered appliances, notes the Erie County Recycling Commission. Gasoline is flammable and difficult to get rid of, which makes reconditioning and reusing old gasoline ideal.
Gasoline can usually be restored for use even if it has water and is very old, states the Erie County Recycling Commission. The exception is contaminated gasoline. Old gasoline is restored by pouring the remains through a funnel lined with a filter into a second container. The process can be repeated until the gasoline comes out clean, without particles or sludge. After letting the filter dry, people can combine one part reconditioned gasoline with five parts of new gasoline.
Gasoline that is contaminated with antifreeze, coolant and other chemicals should never be reconditioned. People should also avoid putting gasoline in the trash or pouring into bodies of water and sewers. Doing so may result in legal consequences and cause environmental damage, notes Marathon Petroleum. Until it is reconditioned or disposed of, gasoline should be stored in tight, sealed containers in room temperatures. It should be placed in a garage or nonliving area and sheltered from children, pets and flammable substances.