Every five years, the U.S. Geological Survey releases data on water usage by state. The data detail the amount of water used for agriculture, municipal and industrial uses (M&I- public or private water utility providers), mining, private industrial wells and thermoelectric generation. The data also provide a look at the sources of water within the state, either surface sources, such as lakes, reservoirs and rivers or ground sources — wells and springs. The release of these data is slow, and data from 2000 have just recently been published. Along with previous reports from 1985, 1990 and 1995, these data provide a time series of water usage in Utah and other states. According to the 2000 data, Utahns used 4.76 billion gallons of water per day. Irrigation remains Utah’s largest use category and the percentage of water used for this purpose is up slightly from 79.2% in 1995.