law: Factories Act, 1948 
  18. Drinking water 
  (1) In every factory effective arrangements shall be made to
  
  provide and maintain at suitable points conveniently situated for all workers
  
  employed therein a sufficient supply of wholesome drinking water.
  (2) All such points shall be legibly marked "drinking
  
  water" in a language understood by a majority of the workers employed in
  
  the factory, and no such point shall be situated within 38[six
  
  meters of any washing place, urinal, latrine, spittoon, open drain carrying  sullage or effluent or any other source of contamination]
  
  unless a shorter distance is approved in writing by the Chief Inspector.
  (3) In every factory wherein more than two hundred and fifty
  
  workers are ordinarily employed, provisions shall be made for cooling drinking
  
  water during hot weather by effective means and for distribution thereof.
  (4) In respect of all factories or any class or description of
  
  factories the State Government may make rules for securing compliance with the
  
  provisions of sub-sections (1),(2) and (3) and for the examination by
  
  prescribed authorities of the supply and distribution of drinking water in
  
  factories.