What to Do With Drained, Contaminated Water From a Gas Tank?
Water that has been contamined with gasoline cannot just be flushed down the drain or dumped on the side of the road. It must be handled and disposed of with care, since it contains a hazardous material that is also flammable and explosive. If you have drained water from your gas tank, you will need to treat it and dispose of it as if it were regular gasoline.
