You probably have to separate out "the EPA" (a somewhat loaded term) from the things the EPA did, like ban Lead in drinking water, or eliminate acid rain.
If you break it down to the concrete actions, most of the historical ones are reasonably popular. Even today (well, 2017) "The EPA", unqualified, was reasonably popular:
> Some 39 percent of Americans would like to see the EPA, the nation’s top environmental regulator, “strengthened or expanded,” while another 22 percent hope for it to “remain the same,” according to the poll. Just 19 percent said they would like to see the agency “weakened or eliminated” and the rest said they “don’t know.”
If you break it down to the concrete actions, most of the historical ones are reasonably popular. Even today (well, 2017) "The EPA", unqualified, was reasonably popular:
> Some 39 percent of Americans would like to see the EPA, the nation’s top environmental regulator, “strengthened or expanded,” while another 22 percent hope for it to “remain the same,” according to the poll. Just 19 percent said they would like to see the agency “weakened or eliminated” and the rest said they “don’t know.”
(https://www.reuters.com/article/us-usa-trump-environment/unl...)