Environmental compliance regulations vary by region. The Environmental Protection Agency's web site has a wealth of information about region-specific issues. Here is a list of links to web pages of the 10 EPA Regional Offices:

U.S. Environmental Protection Agency Publications.
Search by Keywords and Program Areas to find articles relative to your cleaning needs.
http://cfpub1.epa.gov/npdes/pubs.cfm?program_id=0

EPA Region 1: New England
Region 1 includes New Hampshire, Vermont, Maine, Massachusetts, Rhode Island, Connecticut and 10 Tribal Nations.
http://www.epa.gov/region1/

EPA Region 2: New York/New Jersey and more
Region 2 includes New York, New Jersey, Puerto Rico, US Virgin Islands, and 7 Tribal Nations.
http://www.epa.gov/region2/

EPA Region 3: Mid-Atlantic
Region 3 includes Delaware, District of Columbia, Maryland, Pennsylvania, Virginia and West Virginia.
http://www.epa.gov/region03/index.htm

EPA Region 4: Southeast
Region 4 includes Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina and Tennessee.
http://www.epa.gov/region4/

EPA Region 5: Great Lakes
Region 5 includes Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin and 35 Tribes.
http://www.epa.gov/region5/

EPA Region 6: South Central
Region 6 includes Louisiana, Arkansas, Oklahoma, New Mexico, Texas and 65 Tribes.
http://epa.gov/region6/index.htm

EPA Region 7: Midwest
Region 7 includes Iowa, Kansas, Missouri, Nebraska and 9 Tribal Nations.
http://www.epa.gov/region7/

EPA Region 8: Mountains and Plains
Region 8 includes Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming, and 27 Tribal Nations.
http://www.epa.gov/region8/

EPA Region 9: Pacific Southwest
Region 9 includes Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations.
http://www.epa.gov/region9/

EPA Region 10: Pacific Northwest
Region 10 includes Alaska, Idaho, Oregon, Washington and Native Tribes.
http://www.epa.gov/region10/