GREEN WATER
	This is most often caused by too many nutrients and too little water flow.  It is also contributed to by overuse of fertilizer and destruction of rooted plants along the shore and bottom.  When present, these rooted plants use up nutrients and keep algae from growing quickly.
	WEED MAT
	The submerged plaints in canals decompose and float to the surface.  It is primarily seen in the late summer and early fall.  Lee County Hyacinth Control (LCHC) can usually treat the problems.
	BAD ODORS
	The septic field may not be working and leaking into canals leaving a rotten-egg smell.  Low oxygen and too much organic waste could also be a cause, or it could be anaerobic mud turned by storm events.  If this is present after storms, the mud will gradually settle again.
	FILM ON WATER
	Some is natural and normal, and will dissipate with rainfall or time.  Oil and gas could cause this - look near boats, watch for people dumping oil, etc. into storm drains as they lead directly into canals.
	SLUDGE ON TOP OF WATER
	After storms or high winds, this could be algae broken loose from the bottom.  It will gradually settle again. DEBRIS, ETC.  Help us by picking it up with a net and throwing it into your trash or garbage, or call our office.
	FLOATING PLANTS
	Water hyacinths, water lettuce and duckweed may be present in seawater canals.  This is usually due to opening the locks for Lake Okeechobee.  the plants may survive during the rainy season as the river is fresh, but as it turns saltier, they will die.  Call LCHC for treatment.
	DARK WATER
	This could be tannins released from upstream, and should eventually wash out.  If the water is cloudy, then it could be a turbidity problem due to dumping or construction work.  Call ERD to report a possible violation.
	FISH KILLS
	In warm weather, this is often caused by a lack of oxygen and the fish suffocate.  This could also be due to the introduction of toxins (i.e. pesticides) by runoff or dumping.  Call the ERD to report.

 

This brochure was prepared by the Environmental Resources Division of the City of Cape Coral.  Illustrations by Intergraphic Sign & Design, Inc.
The brochure is printed on recycled paper using environmentally friendly inks.