The New York Times published an article on July 28th, titled “Study Shows Rising Risk to Waterways from Fertilizers.” The article states that increased use of fertilizers from homeowners treating their lawns and from farms use of fertilizers on their crops can result in harmful algae blooms in nearby waterways during heavy rainfalls. The rains wash nitrogen and other chemicals off of lawns and farmland into lakes, streams and rivers which pollutes our sources of water for drinking, fishing and recreation.
Climate Change will increase the rate of rainfall according to the article which will increase the amount of chemicals pouring into our waterways. Scientists urge agricultural businesses to rethink their use of fertilizers when their properties are located near lakes, streams and rivers. Eutrophication is a term used to describe the growth of plant life such as algae which occurs when excess nitrogen washes into waterways and cuts off the supply of sunlight and oxygen. The depletion of oxygen in a waterway creates a dead zone in which other forms of life cannot live.
One of the biggest dead zones in the U.S. is the mouth of the Mississippi River which covers an area of 10,000 square miles or about the size of Vermont. Billions of gallons of water laden with chemicals comes coursing down the river from cities and towns in the middle and upper Mississippi River Water Basin. The pictures shown above left to right are of the Caloosahatchee River, Kissimmee River and Lake Okeechobee which are all affected by nitrogen, fertilizer and sewage runoff resulting in Eutrophication and dead zones. The South Florida Water Management District has good information about their efforts to control pollution runoff and protecting our lakes, streams, beaches and other wetlands from pollution.