It’s not always easy to tell if the water you’re drinking is safe. Some ways to check include lab testing and filters. And soon it could include E. coli bacteria. San Diego scientists are developing a new bacteria-based water sensing technology.

At Edison Elementary School in City Heights on a December afternoon, excited school children are grabbing their favorite foods and drinks.

It is well known that what children consume here impacts their brains and bodies. From the teriyaki chicken to the drinking water at the nearby fountain.