GAMA: Ground-Water Ambient Monitoring and Assessment
Sierran Regional Study Unit
The Sierra Regional Study Unit consists of 1 study area encompassing the entire Sierra Nevada (note: the Tahoe/Martis, Central Sierra, and Southern Sierra Study Units are included in the area of the Sierran Regional Study Unit). Portions of 23 of the 58 counties in the State of California are within the study unit (county boundaries indicated by dashed lines) Press release: USGS scientist to discuss two Sierra Nevada groundwater studies |