Water withdrawal data reported under Public Act 399 of 1976, as amended, include information reported through the water supply program at DEQ by all community public water systems that withdraw groundwater. Thermoelectric power generation, industrial/manufacturing, and non-agricultural irrigation facilities with a pumping capacity of more than 70 gallons per minute (100,000 gallons per day averaged over any 30-day period) are required to report to the DEQ under Part 327, P.A. 451 of 1994, as amended. All withdrawals in this data set are defined as groundwater for the purpose of this project. However, some withdrawals reported by non-agricultural irrigators come from combined well and pond sources and include a combination of groundwater and surface water.