Water Quality

One of the most important factors in water quality is the source: the purer the source, the better the water. EBMUD's primary water source is Sierra Nevada snowmelt. Before the water comes to your tap, EBMUD takes many steps to ensure its quality. This includes carefully managing and protecting watershed lands and reservoirs, treating the water, sampling and analyzing for water quality, and investigating and correcting consumer concerns.

EBMUD has an extensive water quality program that protects water quality in the watersheds and reservoirs, enhances water quality through treatment and filtration, and maintains that quality through the distribution system to the tap. These efforts assures that all customers get high-quality drinking water that meets or surpasses all state and federal regulatory requirements.

For more detailed information about water quality, please view the links below.

Annual Water Quality Report

EBMUD's water quality report provides information on where customers' water comes from and how water quality compares with regulatory standards.

Laboratory System

EBMUD's laboratory performs hundreds of thousands of analyses annually to ensure the safety of the drinking water supply, and to monitor wastewater treatment and protection of San Francisco Bay.

Water Treatment Plants

EBMUD's six water treatment plants can filter and process more than 375 million gallons of water daily.

Water Quality FAQs

Water quality problems are carefully investigated by the District's Water System Inspectors. To report a problem please call 1-866-40-EBMUD (1-866-403-2683).