An underground reservoir called the Floridan aquifer lies about 1,000 feet ( 300 m ) below the surface of South Florida .
While they are common in the northern portion of Florida , no underground springs feed water into the Everglades system .
An underground reservoir called the Floridan aquifer lies about 1,000 feet ( 300 m ) below the surface of Florida   .
While they are common in the northern portion of Florida , no underground springs feed water into the Everglades system .