A watershed is an area of land that water flows across as it moves
toward a common body of water, such as a stream, river, lake or
coast. You're sitting in one
now! All land is part of a watershed. A watershed can be very large,
draining thousands of square miles to a major river, lake or the
ocean, or very small, draining a few acres to a small pond. Because
water moves downstream in a watershed, any activity on the land
or in the water that affects water quality or quantity at one location
can change the characteristics of the watershed at locations downstream.
This means everyone who lives or works in a watershed needs to take
measures to protect watershed health.