"[Since] 2009, the U.S. Environmental Protection Agency (EPA) has proposed and promulgated numerous regulations to implement the pollution control statutes enacted by Congress. [...] Some, both within Congress and outside of it, have accused the agency of reaching beyond the authority given it by Congress and ignoring or underestimating the costs and economic impacts and overestimating the benefits of proposed and promulgated rules. [...] Environmental groups and other supporters of the agency disagree that EPA has overreached. Many of them believe that the agency has, in fact, moved in the right direction, including taking action on significant issues that had been long delayed or ignored in the past. [...] EPA has stated that critics' focus on the cost of controls obscured the benefits of new regulations, which, it estimates, far exceed the costs. [...] This report provides background information on EPA regulatory activity during the Obama Administration to help address these issues. It examines major or controversial regulatory actions taken by or under development at EPA from January 2009 to late 2016, providing details on the regulatory action itself, presenting an estimated timeline for completion of rules not yet promulgated [...] [and] providing EPA's estimates of costs and benefits, where available. The report also discusses factors that affect the time frame in which regulations take effect, including statutory and judicial deadlines, public comment periods, judicial review, and permitting procedures, the net results of which are that existing facilities are likely to have several years before being required to comply with most of the regulatory actions under discussion."
CRS Report for Congress, R41561
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html