Ogeechee Riverkeeper works on all of the streams flowing out to Ossabaw Sound and St. Catherine’s Sound.

The Ogeechee River system drains more than 5,000 square miles of land and includes four sub-watersheds: Upper Ogeechee, Lower Ogeechee, Ogeechee Coastal and the Canoochee watersheds.

The Ogeechee River itself is approximately 245 miles long.

The freshwater streams in this river system are known as blackwater streams due to their dark, tea-colored water. The tannins from the swamps stain the water the tea-color and make the water more acidic than other streams. This acidity reduces the amount of vegetation that can grow naturally in the rivers, and also affects the mercury uptake by fish.