This Sub-class includes the collection, purification and distribution of water to household, industrial and commercial users. Units in this Sub-class are primarily engaged in one or more of the following: •collection of rain water •purification of water for water supply purposes •treatment of water for industrial or other purposes •desalting of sea or ground water to produce water as the principal product of interest •distribution of water through mains •desalination of water
•treatment of wastewater in order to prevent pollution, see 37000 (long-distance) transport of water via pipelines, see 49300