There are six subregions of the
1. Northeast Subregion
2. Eastside Subregion
3. Sacramento Valley Subregion
4. Westside Subregion
5. Feather River Subregion
6. American River Subregion
All of Butte County's watersheds are located within the Eastside and Feather River subregions.
There are five watersheds that lie within Butte County boundaries:
“Sacramento River Basin Watersheds.”