Each of the 18.4 million people that live in the region affects the Bay: consuming resources, altering the landscape and polluting the air and water.

Experts predict the watershed’s population will increase to over 22 million by the year 2050.


In 2020, an estimated 18.4 million people lived in the Chesapeake Bay watershed: a 0.23% increase from 2019. Experts predict the watershed’s population will increase to over 22 million by the year 2050.


The increase observed in the watershed's population between 1950 and 2019

The decline in the health of the Chesapeake Bay is linked to the rise in the watershed's population, and a survey of stewardship actions in our region found many residents are not doing everything they can to protect clean water. Fifteen percent of residents, for example dispose of used cooking oil or grease down the drain, which can clog pipes and block wastewater from exiting their home's plumbing. Thirty percent of residents use pesticides in and around their homes, 35 percent use herbicides to control weeds in their yards and 36 percent use fertilizers on their lawns. These chemicals can add toxics to the water and make animals sick. As the population rises, the impacts of these actions will grow.

Urban and suburban development has a bigger and more serious impact on the environment than population growth. During the second half of the twentieth century, trends indicated a rise in the sprawling suburbs, large lots and big houses that replaced forests, farms and other valuable lands and led to an increase in polluted rivers and streams. More recent trends suggest a potential and promising resurgence of growth in urban areas, which often already have roads, sewer systems and other infrastructure to support a rising population without generating a rise in impervious surfaces, stormwater runoff or wastewater pollution.