Section 2(58) in The Delhi Municipal Corporation Act, 1957
(58)"trade effluent" means any liquid either with or without particles of matter in suspension therein, which is wholly or in part produced in the course of any trade or industry carried on at trade premises, and in relation to any trade premises means any such liquid as aforesaid which is so produced in the course of any trade or industry carried on at those premises, but does not include domestic sewage;
