Is the Chesapeake Bay Suffocating?
The Chesapeake Bay, like humans, needs oxygen to thrive. The excessive presence of nitrogen and phosphorus in the water has slowly suffocated fish and shellfish as well as supported the growth of algae, preventing sufficient sunlight from reaching the underwater grasses. These grasses serve as natural filters of phosphorous and nitrogen and have been dying, creating so-called “Dead Zones.” Moreover, prior to the presence of almost 14 million people in the Bay watershed, forests and wetlands served to absorb much of this excess. However, as farms, cities, suburbs and towns gradually replaced this natural sponge, the Bay’s health declined.
Because of the Chesapeake’s size (it’s America’s largest estuary), its tidal relationship to the Atlantic Ocean, and multiple Federal and state environmental regulations, its watershed is difficult to control. It includes six states as well as Washington, D.C., and is crossed by many rivers and streams into which tons of pollutants containing phosphorous, nitrogen, and other harmful substances are dumped.
The Susquehanna River provides nearly half of the Bay’s fresh water, 41% of its nitrogen, 25% of its phosphorus and 27% of its sediment load. The River’s upper riparian states (New York and Pennsylvania) are densely populated. Their wastewater treatment plants, agricultural, urban and suburban runoff, collect eventually behind Maryland’s 90-year-old Conowingo Dam. The sediment trapped behind the dam contains large amounts of nitrogen and phosphorus and other potential pollutants. During its existence, the dam has prevented considerable poisons from entering the Bay. However, its storage capacity has largely been filled.
The Susquehanna is not the only river with streams contributing to the Chesapeake’s water pollution. Delaware, Maryland, Virginia, and West Virginia’s rural and agricultural areas (particularly poultry farms), water treatment plants, and road systems also produce serious amounts of contaminant run-off—largely nitrogen and phosphorous.
Exelon Corporation, owner of the hydropower-generating Conowingo Dam, has been portrayed by many as the principal villain in polluting the bay. That is not true. If the dam did not exist, no containment of pollution-filled sediment would have taken place and more contaminants would have reached the Bay.
The solution to the Chesapeake’s pollution problems lies with the Federal Government, the District of Columbia and the six states in the Chesapeake Bay’s watershed, and most importantly, the actual private and public polluters. While the past ten years have seen substantial attention paid to improving the Chesapeake’s water quality and some progress has definitely been made, the Bay is still struggling to breathe.
Common Sense for the Eastern Shore




