Many residents have commented this winter on the offensive odor originating in the lagoon in many areas. This odor problem is usually worst in the warm summer months when biological activity is at a peak. This winter, however, has seen unusually widespread reports. The odor itself is not from releases of sewage but poorly maintained septic systems may be contributing to the problem. The odor is partially caused by the decomposition of organic materials (such as dead algae) in the bottom sediments. Anaerobic means "without oxygen" and these conditions often occur in bottom sediments, particularly in the black "muck" associated with run-off from developed areas. As this "muck" continues to cover the bottom of the lagoon, these anaerobic zones expand. Since there is no oxygen, the rotting vegetation does not oxidize. Instead the Decomposition causes sulfur to be released as hydrogen sulfide which has a "rotten egg" odor. Dead algae and seagrass that accumulated on the shoreline also release a wide range of gases that contain sulfur and can be offensive to the nose but ordinarily not otherwise harmful.

   Don't Just Hold Your Nose - Do Something!

   What can you do to "stop the stink"? If we reduce nutrient inputs into the lagoon, we can minimize algal growth and the resulting decomposition problems. If you are on septic, convert when you get the chance to sewer. In the meantime have the tank inspected at least every three years and pumped out as needed. Minimize fertilizer use to twice a year, using only slow release fertilizers and avoiding water soluble products that wash away with the first rain. Even if you live miles away, canals may transport fertilizers and pesticides from your lawn to the lagoon.