NGWA's ground water-use compilations are a convenient resource for the industry market information you want to know.
Ground water facts
Ground water withdrawal in the United States
U.S. water wells in place by state and end use
Ground water's role in states' economic vitality
Ground water use for America (PDF)
The recently issued “Ground-Water Availability in the United States (USGS Circular 1323)” also provides useful regional information for state and local agencies, along with providing the building blocks for a national assessment of this resource.