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Factors Impacting Bay and Watershed Health

The impact of human activity is overwhelming nature and offsetting cleanup efforts in the Bay and its watershed.

  • Pollutants: The Chesapeake Bay and its tributaries are unhealthy primarily because of pollution from excess nitrogen, phosphorus and sediment entering the water. The main sources of these pollutants are agriculture, urban and suburban runoff, wastewater, and airborne contaminants.
  • Land Use: One of the greatest challenges to restoration is continued population growth and development, which destroys forests, wetlands and other natural areas.
  • Natural Factors: Annual rain and snowfall affect how much water flows in rivers. The levels of pollution entering the Bay each year generally correspond with the volume of water that flows from its tributaries.
  • Other Pressures: There are several other factors that impact the overall health of the ecosystem. These include climate change, invasive species and fisheries harvest.
Assessments
Importance

Everything that happens on land has an impact on the water. The man-made pressures on the Chesapeake Bay and its watershed began more than 400 years ago, when the first European colony was founded at Jamestown, Virginia, and Captain John Smith led expeditions around the estuary.

During the four centuries that followed, the human population swelled, forests were chopped down, industrial activity ensued, fish and shellfish were harvested, towns and cities were built, and toxic chemicals were released into the environment. These factors disrupted the natural functioning of the entire ecosystem and led to a tremendous decline in the Bay’s health.

Today, human activity continues to drive the primary sources of pollution, which are agriculture, urban and suburban lands, wastewater, and air pollution.

Goal

The factors impacting Bay and watershed health are tracked with 12 reporting-level indicators grouped in four priority areas that represent major stressors to the Bay ecosystem:

The indicators are not related to goals at this time.

Additional Information

In Factors Impacting Bay and Watershed Health, the most current monitoring data available are used to provide an assessment of various factors impacting the health of the Bay and its watershed. 

Contact

Nita Sylvester at (800) 968-7229 ext. 711

Source of Data

Chesapeake Bay Program Office

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Last modified: 03/20/2009
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