http://www2.epa.gov/aboutepa/epa-history
I think it was started by presidential decree. I suppose it can be reversed the same way. Frankly, we need to dispose of most of the alphabet soup agencies. Energy, that has done nothing for independence, Education that has done nothing for education, Rural electric board (oh, give me a break), the DEA, IRS....
The very best president we have had in the last 70 years has been Reagan, he promised to rid the country of the department of education, he made it bigger.