GEOLOGY

Detailed explanation-1: -The water authority has intakes in Lake Huron, Lake St. Clair, and the Detroit River. Most other Michigan residents get their water from groundwater sources, about half through a public water supply and the other half through private wells.

Detailed explanation-2: -Summary of Where Does Groundwater Come From? Groundwater is an integral part of the water system, which means that the story starts with precipitations. Rain or snow falls, and the precipitation infiltrates the soil and eventually percolates to the water table, where it earns the title groundwater.

Detailed explanation-3: -The reason: Despite all that surface water, nearly half of Michigan’s residents get their supplies from underground. The state has the most household wells in the U.S. Collectively, the Great Lakes region is believed to have enough groundwater to fill another Lake Huron. But it isn’t evenly distributed or accessible.

Detailed explanation-4: -Most modern groundwater can be found in tropical and mountainous regions, according to the map. Some of the largest deposits are in the Democratic Republic of Congo, Indonesia and along the Rockies in the US.