I RTFA and don't get the controversy. Of course the data used to form regulations should be easily available to everybody. The only reason to use secret data is you want to hide something.
Not trying to troll here, just not seeing the other side.
So you'd be okay with the EPA releasing your personal data if you were part of health impact study? You'd be okay with letting some company dump unknown toxins into your water because the EPA can only regulate what's publicly available and said toxins are guarded by "trade secrets"? How about nuclear waste, where the contents, sources, and locations are all "secret" knowledge?
Do you see where this going?
Any bill regarding the EPA pushed forward by republicans is designed to destroy the EPA. They don't give a single fuck about pollution or destroying the environment. They want to go back to the days where you could set Lake Eerie on fire and getting black lung from living downwind of a coal plant. They want science to die a miserable death in all it's forms.
Always read the fine print. This bill is specifically crafted to remove the EPA's ability to function, with the eventual goal of disbanding it entirely.