Industry today pays for water. In most situations potable water is metered going from mains into relative buildings. For the majority of businesses this is their only source of water as there has been no alternative.
Now there is an alternative source of water available, rainwater.
Typically rainwater is an alternative to public main water for WC’s, vehichle washdown, sprinkler systems, process water and other applications where the water is not used for drinking or bathing.