Responsibility for enforcement of equal employment requirements for federal construction contractors, which has been spread among 15 government agencies, is being consolidated in five agencies effective today, the Department of Housing and Urban Development announced.

HUD will share responsibility for enforcement with the Defense Department, the Environmental Protection Agency, the General Services Administration and the Energy Research and Development Administration.

HUD is taking over functions previously performed by the Veterans Administration and the departments of Commerce and Health, Education and Welfare. Some 67 equal employment officers from various agencies are being reassigned to the five agencies.

Federal law prohibits contractros and subcontractors on federal projects from discriminating on the basis of race, color, sex, religion or national origin. There have been 15 disbarments of contractors since the program began in 1965.

In the latest two, in August, the Ingersoll Milling Machine Co. of Rockford, Ill., and Anastasi Brothers Corp., a Philadelphia firm described as one of the nation's largest masonry contractors, were barred by the Labor Department because of alleged discrimination against minorities.

The government charged that an average of less than 16 per cent of the bricklayers employed by Anastasi on New Haven, Conn., hospital construction project were members of minority groups, when the area labor force called for between 26 and 39 per cent. Anastasi also allegedly laid off minority workers before others and refused to participate in minority training programs. Anastasi held a $50,000 masonry subcontract on the federally assisted construction project.

Ingersoll was debarred ffom federal contract work for alleged discrimination against women and minorities, the agency said.

Labor Secretary Ray Marshall said the deberment of Anastasi Brothers, the second such action under the Carter administration, was "yet another indication of my determination to guarantee equal employment opportunity on federal and federally assisted contract work."