1) Well Water - Digging a ...
Published by Jay Farmerie
1) Well Water - Digging a well of your own to supply water
2) Waste water discharge from municipality - (Some municipalities well sell your their discharge at reduced costs.
3) Wastewater from inside your own facility
4) Rainwater
5) condensate from HVAC Coils
6) Water softener backwash or fast rinse water
All may require you to look at metallurgies of your system, pretreatment required, extra chemistry needed, collection system, etc.
Do an ROI on the water and treatment and calculate if it is woth it.