Our Waters

Maryland is a unique area in that we have a number of different resources so close together. Making this situation even more complex is the fact that those areas intertwine, and it is the responsibility of the Department of Natural Resources to effectively manage Maryland's bays and streams that lie within and tie into our watershed. This content area is divided into four sections: streams, the Chesapeake Bay, the Coastal Bays and watershed information.

Eyes on the Bay

Eyes on the Bay

DNR performs continuous monitoring at many locations throughout the Chesapeake Bay and its tributaries. Get real time information for your area.

Growing Oysters

Growing Oysters

The Marylanders Grow Oysters Program links private pier owners with oyster reef restoration. Oysters are grown, then placed on protected reefs.

Maryland’s Ocean - Photo by Allen Sklar

Mid-Atlantic Regional Council on the Ocean

Maryland is partnering with its sister states to ensure that our ocean is healthy, resilient, and productive.

Thanks Stream Waders

Stream Waders

DNR thanks all our great volunteers working to help us gather data about the rivers and streams of the State. Get involved with the Maryland Stream Waders!

How Big is the Bay?

The Chesapeake Bay is about 200 miles long. At the Bay Bridge near Annapolis, it is only 4 miles across, but it is 30 miles across at the widest point near the mouth of the Potomac River.

Chesapeake Bay Hotline

Call 1-877-224-7229

to report any of the following

  • Boating accident or reckless activity
  • Fish kill or algal bloom
  • Floating debris that poses a hazard to navigation
  • Illegal fishing activity
  • Public sewer leak or overflow
  • Oil or hazardous material spill
  • Critical area or wetlands violation
  • Suspicious or unusual activity