Spring Flows

Blue Spring, one of more than a thousand springs in Florida, is the largest spring on the St. Johns River and the 17th largest in Florida in terms of rate of discharge. With an average discharge of 102 million gallons per day, Blue Spring is one of Florida’s 27 first-magnitude springs. The average daily discharge is equivalent to a pool of
water the size of a football field (360 x 160 feet) that is 240 feet deep. The discharge varies based on rainfall and withdrawals of water from the springshed. Blue Spring is a designated manatee refuge, and an important part of the St. Johns River ecosystem.