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rd!m!mI Acre-Ioot- 325,851 gallons or enough water to cover an acre of land 1 foot deep. An average California household uses between one-half and one acre-foot of water per year. One million gallons a day (mgd) equals 1,120 acre- feef a year. Biosollds - stabilized sludge removed from wastewater, treated by digestion. Colorado River - The water source supplying up to 5.3 million acre-feet of Colorado River Water into southern California annually. Developed Water - water that is controlled and managed (dammed, pumped, di- verted, stored in reservoirs or channeled in aqueducts) for multiple uses. Disinleclion - the inactivation of waterborne bacteria, viruses and protozoa using chlorine, ultra-violet light or ozone. Gray Water - Water typically collected from clothes washers, bathtubs, bathroom sinks and piped through a separate set of pipes for reuse on site for landscape irrigation (subsurface) and other non-potable uses. Gray water is not water from toilets, kitchen sinks or dishwashers. Groundwater - waler that has seeped beneath the earth's surface and is stored in the pores and spaces between alluvial materials (sand, gravel or clay). Non-potable water - water not suitable for human consumption. Treated nonpotable water is used for numerous purposes except drinking and cooking. Primary treatment - the initial level of waste- water treatment involving the removal of about 60 percent of the solids through a physical process of sedimentation. 10 Potable Water - water that undergoes several advanced treatment processes and is consid- ered suitable for drinking and cooking under the U.S. Safe Drinking Water regulations. Reverse osmosis (RO) - a process used in desalination of seawater, brackish water and wastewater treatment, which forces water through a membrane to filter out sodium, chloride and other contaminants. Sea water barrier - the injection of water into the ground to prevent sea water from intruding into groundwater supplies along coastal areas. Secondary treatment- a biological water treat- ment process involving oxidation of organic matter and sedimentation of suspended particles following primary treatments. May also be followed by disinfection, depending on the type of disposal or reuse contemplated. State Water Project (SWP) - state.owned and operated water project, which delivers 2.4 million acre-feet of water annually to the Bay Area, Central Valley, North Bay, Central Coast and Los Angeles. Surface water - water that remains on the earth's surface, in rivers, streams, lakes, oceans and reservoirs. Tertiary Treatment - secondary-treated waste. water that is filtered through sand or other granular media to remove fine suspended sediments and disinfected. Title 16 - federal funding provided for water recycling projects. Title 22 - state guidelines for how treated and recycled water is discharged and used in California. The standards also require the Department of Heaith Services to develop and enforce water and bacteriological treatment standards for water recycling and reuse. Wastewater - used water discharged from homes, businesses, cities, industry and agriculture.