The EPA launched [1]a new "Rulemaking Gateway [2]" to improve the public's ability to search, understand, and comment on the rules being considered by the agency. This new website complements the government-wide www.regulations.gov [3], which recently was redesigned.
Links:
[1] http://blog.epa.gov/blog/
[2] http://yosemite.epa.gov/opei/RuleGate.nsf/
[3] http://www.regulations.gov/search/Regs/home.html#home