The Trinity Aquifer is a key water source for the San Antonio and Hill Country area, and its health plays a key role in the health of another important water source, the Edwards Aquifer, which provides water for more than 2 million people. Protecting the Trinity and understanding how it functions and interacts with the Edwards Aquifer is of growing importance as drought and higher demand combine to make water supply an ongoing problem in Texas, experts say.

Read more from Liz Teitz and Wesley Ratko with San Antonio Express-News here.