The district was founded after a severe drought in 1923 proved that a local system of reservoirs was inadequate. The district built a pipeline to the Mokelumne River in the Sierra Nevada. Today, several hundred miles of large diameter pipes bring the water to various reservoirs in the East Bay area. Water is then transported to several treatment plants and delivered to local small reservoirs and tanks, where it is then distributed by gravity to households.
By bypassing the Sacramento Delta, EBMUD can deliver especially high quality water with low salinity. EBMUD has also switched from the use of gaseous chlorine to the use of chloramine, improving the water's taste.
EBMUD was told by its expert that the hydrogen sulfide in Camanche was a result of increased nutrients carried into the reservoir waters by sediments which often result from upstream logging.
EBMUD contends that the trial court erred in finding that it had failed to prove by a preponderance of the evidence that CDF's pattern and practice of assessing cumulative impacts was legally inadequate.
EBMUD argues that it was the prevailing party in the declaratory relief action because the trial court found the Guidelines to be illegal, underground regulations.