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Water Quality Data
COG has been working throughout the region to coordinate the water quality monitoring efforts since the early 1980s. COG's water quality monitoring program is a cooperative water quality monitoring effort with is funded, operated, and maintained by participating agencies and local jurisdictions in the metropolitan Washington region.

We continually update our database and would like to hear from you! Please let us know about your monitoring program. Contact Steve Bieber (202) 962-3219 or Christine Howard (202) 962-3366 for more information.

Potomac Water Quality Monitoring Programs in the COG Region

State Programs

Maryland
Maryland Department of Natural Resources Water Quality Monitoring Program

The District of Columbia
Department of the Environment
District of Columbia Water Quality Monitoring Program

District Department of the Environment

Virginia
Virginia Department of Environmental Quality - Ambient Water Quality Program

Virgina Shallow Water Quality Monitoring Program - Continuous Monitoring

Virginia Shallow Water Quality Monitoring Program - DATAFLOW

Local Government - University -
Non-profit Programs

George Mason University - Gunston Cove Study

Fairfax County Department of Public Works

Broad Run Water Quality Study

National Park Service – Inventory and Monitoring Program

Potomac Fall Line Monitoring at Chain Bridge - Occoquan Watershed Monitoring Laboratory

Great Falls
Continuous Monitoring Data
Generally deployed from April - October to measure water quality parameters every 15 minutes with a YSI probe measuring dissolved oxygen, turbidity, chlorophyll, water temperature, salinity, and pH. Currently used by MDDNR, VADEQ, USGS, St. Mary's College, and GMU (Tidal Occoquan River, Belmont Bay)

Stormwater Information:
Fairfax County Stormwater Planning Division (SWPD)
Department of Public Works & Environmental Services

Additional Water Quality Links:

Harmful Algal Bloom Information

Maryland Water Monitoring Council

Virginia Estuarine & Coastal Observing System

METROPOLITAN WASHINGTON COUNCIL OF GOVERNMENTS

777 North Capitol Street, NE • Suite 300 • Washington, DC 20002
Phone: 202.962.3200 • Fax: 202.962.3201