Maybe they are concerned in an abstract sense, and definitely they are when it negatively impacts them. The problem is they offer little to no support for EPA, and red states have been gutting their state EPAs (or putting into place shills for mega-polluters) for decades now, because they are "bad for business".

A few years ago I was reading about an issue with the cleanup of a coal fired power plant. The power plant owners collected a cleanup surcharge for the entire life of the plant, and put it into escrow. It was supposed to be used to handle site cleanup after decommissioning. For some reason, the company was allowed to sell the site, escrow, and all liabilities to some random 1-person LLC. This person then spent all the escrow funds paying companies he owned to do none of the work properly, and now the people in the region who are dealing with the effects of this botched cleanup have no recourse. Coal retention ponds are nasty, nasty things and because they weren't properly dealt with, its leaking into the water supply.