Section 64(3)(e) in The U.P. Factories Rules, 1950
(e)The water supply to the washing facilities shall be capable of yielding at least six gallons a day for such person employed in the factory and shall be from a source approved in writing by the Health Officer. Provided that where the Chief Inspector is satisfied that such an yield is not practicable he may by certificate in writing permit the supply of a smaller quantity not being less than one gallon per clay for every person employed in the factory .