from san pablo to san leandro, dan ville to berkley. 4200 miles of pipe in the east bay alone. more than 800 breaks last year. >> the oldest pipes date to the 1800s. >> a district that everybodies about 1-1/2 million people. >> our goal is to make sure that every time you go to your tap and turn on the faucet that clean water comes out every single time. >> the pipes carrying the fresh water is made with all types of materials. everything from cast iron to steel. pvc to asbestos cement a as the pipes age, they break in different times in their life cycles. some of the oldest pipes are lasting longer than those builtly in the 1950s and 60s. all of the pipes are getting so old that the rate of the breaks and leaks is rising faster and faster every year. >> as the pipe gets older, it will tend to leak more unless we do something about it. >> that is why east bay mud has as many as 25 member crews, repairing leaks and other maintenance. another 6 to 11 investigators whose only job is to find and uncover leaks. in addition, another 7 teams do nothing but replace old pipelines. in fa