A watershed is an area of land that contributes water to a lake, river, or stream. All of Frisco flows into the Trinity River from 3 watersheds. The majority of the city, 76.7%, flows into the Elm Fork of the Trinity.

Our stormwater does not go to a treatment plant; it flows into lakes which are used for the drinking water supply of other cities who provide drinking water to 5.3 million people.
Watersheds of Frisco
How You Can Help
The rain water that flows across your property can pick up pollutants which can effect the drinking water quality of our neighboring cities downstream. Find out how you can help prevent stormwater pollution.