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The Chesapeake Bay is a dynamic system with natural variations and human influences

Everything that happens on the land affects the health of the Chesapeake Bay. Human activities (pollution and land use) and natural factors (rainfall, temperature, and other conditions) have a significant influence on the health of the Bay and its watershed, and continually challenge efforts to protect and restore it.

<p>Since 2009, pollution loads of nitrogen, phosphorus, and sediment into the Chesapeake Bay and its tidal rivers are reduced. Source: Chesapeake Bay Program.</p>

Since 2009, pollution loads of nitrogen, phosphorus, and sediment into the Chesapeake Bay and its tidal rivers are reduced. Source: Chesapeake Bay Program.

<p>The number of people living in the Bay watershed continues to increase, and development is reducing forests at the rate of 100 acres per day. Source: Chesapeake Bay Program.</p>

The number of people living in the Bay watershed continues to increase, and development is reducing forests at the rate of 100 acres per day. Source: Chesapeake Bay Program.

<p>Annual rain and snowfall determine how much water flows in rivers. The amount of pollution flowing into the Bay each year generally corresponds with the volume of water that flows from its rivers and the concentration of pollutants in that water. Source: Chesapeake Bay Program.</p>

Annual rain and snowfall determine how much water flows in rivers. The amount of pollution flowing into the Bay each year generally corresponds with the volume of water that flows from its rivers and the concentration of pollutants in that water. Source: Chesapeake Bay Program.

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