The tertiary treatment facility consists of a pump feed station, two alum injected pre-flocculation basins, four dual media filter beads, and an additional secondary chlorine contact chamber. The filter beds contain one foot of anthracite and one foot of sand. The filter's backwash components operate on a level indicator probe.
Water is pumped from the feed pump station through the flocculation basins.
From there it flows over the filter beds and filters down through the media. It then gravity flows to the final chlorine contact chamber. Chlorine is injected with a contact time of no less than 15 minutes at peak flow to destroy all pathogenic bacteria. Destin Water Users reuse water is used for irrigation of public access areas including golf courses, median strips, hospital grounds, condominium landscape areas and individual homes. A majority of these customers have no other source for irrigating their landscapes.