Drinking Water

The Source

The FKAA delivers approximately 17,000,000 gallons per day of high-quality drinking water to the residents of the Florida Keys. The FKAA’s primary water supply, the Biscayne Aquifer, is a superior source water meeting and exceeding all regulatory drinking water standards prior to treatment. 

To supplement this source the FKAA also utilizes the Floridan Aquifer, a deeper, more brackish aquifer. In emergency situations, the FKAA has the capability of utilizes two seawater plants, one in Marathon and one in Stock Island, to supply additional water.


The water treatment plant is an integrated source facility staffed by state-licensed personnel. Water produced from the FKAA’s primary supply, the Biscayne Aquifer is treated through a lime softening process. 

Water obtained from the Floridan Aquifer is treated through a low-pressure reverse osmosis treatment system and combined with the treated Biscayne water. A disinfectant and fluoride are added prior to distribution.

How Is My Water Treated

How is Our Water Purified Flyer