Imperial Valley Water Authority - Comprises all of Mason County and four townships in Tazewell County and has the responsibility of regulating water use and priortizing its uses during times of shortage. Mahomet Aquifer Consortium - MAC was formed in 1998 to study the Mahomet aquifer, a sand and gravel aquifer underlying 15 counties in central Illinois. National Ground Water Association - The mission of NGWA is to enhance the skills and credibility of all ground water professionals, develop and exchange industry knowledge and promote the ground water industry and understanding of ground water resources. National Well Owners Association - A resource for present and future well owners. Comprises information about well installation and maintenance including a listing of well contractors by state.
Site includes current drinking water standards for public supplies.
Water Resources of Illinois - USGS information about Illinois groundwater.