(1995) MT9503HR Free Water Home Water Supplies (See also Water Quality) Rainwater Harvesting Systems for Montana Systems and designs for using rainwater to supplement traditional water sources or to use as a standby in emergencies.. (1997) MT9707AG Free Your Home s Health: Household Water Treatment (brochure, 1991) 4419 Free Household Drinking Water Protection and Treatment (1991) EB 102 $3.50 Water Filtering Devices ( 1986) MT8602HR Free Your Home Water Supply: Is It Safe?