Why is the water black in St. Johns River?
Why is the water black in St. Johns River? Johns River's color, sediments and velocity. The St. Johns River is labeled a black-water river because of its deep tea color. The dark water is not from pollution, but rather from the tannic acid that leaches out of the abundance of dried leaves that fall into the swamps and tributaries that flow into the river.
Is it safe to eat fish out of the St. Johns River?
Johns River near the Kerr- McGee hazardous waste site are safe to eat. Pesticides, polychlorin- ated biphenyls (PCBs) and mercury were found in every fish sample ana- lyzed. The Department recom- mends a “Do Not Eat Fish” advisory be issued within the area of the St.
Are there bull sharks in the St. Johns River?
Only the bull shark typically found offshore of Jacksonville can migrate into the local river and swim any distance upstream for very long. Recently a small bull shark was caught near Mandarin. There have been periodic reports of other sharks, usually bulls, being captured in the St. Johns River.
Are there dolphins in the St. Johns River?
The estuarine waters of the St. Johns River in Jacksonville, Florida provide critical habitat for Atlantic bottlenose dolphins (Tursiops truncatus).
Why does river water look dirty?
Sources of turbidity can include soil erosion, waste discharge, urban runoff, eroding stream banks, large numbers of bottom feeding fish, -- which can stir up sediment, excessive growth of algae, microorganisms and land development.