Occupational Employment and Wage Estimates United States Bureau of Labor Statistics Provides an entry point to data about national, regional, state, and local economies, including salary and compensation information.
http://www.bls.gov/oes/oes_data.htm

Competitive Wages When deciding pay rates for skilled workers, it may be helpful to keep tabs on the going rates for your industry and area. The U.S. Department of Labor’s Bureau of Labor Statistics website maintains a comprehensive list of median and mean salaries across the United States by occupation, industry, and area.
http://www.bls.gov/bls/blswage.htm