Shallow Well States (under 150 ft average)
Florida: 50–150 ft (Floridan Aquifer). Louisiana: 50–150 ft (shallow alluvial aquifers). Mississippi: 80–200 ft (Mississippi Embayment). Alabama Coastal Plain: 80–200 ft. These states benefit from productive shallow aquifers near the surface. Low drilling costs result.
Moderate Depth States (150–300 ft average)
Texas (most areas): 150–300 ft. Georgia (South): 100–250 ft. North Carolina (Coastal Plain): 100–250 ft. Iowa: 150–250 ft. Illinois: 150–300 ft. Indiana: 100–250 ft. These states have a mix of sedimentary and crystalline rock formations.
Deep Well States (300–600 ft average)
Virginia (Piedmont): 250–500 ft. North Carolina (Piedmont): 200–450 ft. Georgia (North): 250–600 ft. New England states: 150–500 ft. Tennessee (Appalachian): 200–400 ft. Crystalline rock states require deeper wells to find adequate yield in rock fractures.
Very Deep Well States (600+ ft in some areas)
Wyoming: 300–800+ ft. Nevada: 300–800+ ft. New Mexico: 300–1,000+ ft. Arizona (some areas): 400–1,000+ ft. West Texas: 400–1,000+ ft. Arid Western states often have deep water tables. High drilling costs — $60,000+ for very deep wells is not uncommon.
State Depth Reference Table
Alabama: 80–300 ft | Alaska: varies widely | Arizona: 300–800 ft | Arkansas: 100–300 ft | California: 100–600 ft | Colorado: 100–500 ft | Connecticut: 150–400 ft | Delaware: 50–150 ft | Florida: 50–200 ft | Georgia: 100–600 ft | Idaho: 100–400 ft | Illinois: 150–300 ft | Indiana: 100–250 ft | Iowa: 150–250 ft | Kansas: 100–300 ft | Kentucky: 100–300 ft | Louisiana: 50–200 ft | Maine: 150–400 ft | Maryland: 100–400 ft | Massachusetts: 150–400 ft | Michigan: 100–300 ft | Minnesota: 100–300 ft | Mississippi: 80–200 ft | Missouri: 100–300 ft | Montana: 100–400 ft | Nebraska: 100–300 ft | Nevada: 300–800 ft | New Hampshire: 150–400 ft | New Jersey: 100–300 ft | New Mexico: 300–800 ft | New York: 100–400 ft | North Carolina: 100–500 ft | North Dakota: 100–300 ft | Ohio: 100–250 ft | Oklahoma: 150–400 ft | Oregon: 100–400 ft | Pennsylvania: 100–400 ft | Rhode Island: 100–300 ft | South Carolina: 100–300 ft | South Dakota: 100–400 ft | Tennessee: 100–350 ft | Texas: 150–600 ft | Utah: 200–600 ft | Vermont: 150–400 ft | Virginia: 150–500 ft | Washington: 100–400 ft | West Virginia: 100–350 ft | Wisconsin: 100–300 ft | Wyoming: 200–700 ft