The recipe for San Francisco’s famously delicious tap water is, gulp, about to change.
Most city spigots, which, since the 1930s, have gushed water from Yosemite’s pristine Hetch Hetchy Reservoir, will start delivering the Sierra supply blended with a splash of local groundwater — by many measures, a far inferior source.
The San Francisco Public Utilities Commission recently began digging in and around Golden Gate Park in hopes of drawing underground flows into the mix within the next two years. The move is designed to increase and diversify the city’s water reserves as California faces its worst drought in a generation.
http://www.sfgate.com/bayarea/article/California-drought-S-F-wants-to-add-this-to-5913205.php