Albion Castle

Why Bear Flag Bakery Is Obsessed With Sourcing Unadulterated Spring Water For Sourdough Bread | Eater SF

"Built in 1870 with two-foot-thick walls and a history as a brewery, Albion Castle has an almost military feel—'you can mount a cannon on the roof and shoot into the Bay'—and on-site cisterns that hold about half a million gallons of glacier-blue San Francisco water that predates the 1913 public-use restrictions. The aquifer is 'mind-boggling' though it has issues (mostly biomaterials); the owner initially allowed Harmon to use the supply and Harmon said the resulting loaves were 'the best bread I'd ever made,' but the partnership ended because it wasn’t worth it for Albion Castle to work with such a small business." - Paolo Bicchieri