The Metropolitan Water District of Southern California is a regional wholesaler that provides water for 26 member public agencies to deliver either directly or through their sub-agencies to nearly 19 million people living in Los Angeles, Orange, Riverside, San Bernardino, San Diego, and Ventura counties. The district imports water from the Colorado River and Northern California to supplement local supplies, and helps its members develop increased water conservation, recycling, storage, and other resource-management programs

Drinking water treatment and distribution 

Recycled water

Metropolitan owns and operates an extensive water system including: the Colorado River Aqueduct, 16 hydroelectric facilities, nine reservoirs, 819 miles of large-scale pipes and five water treatment plants. Four of these treatment plants are among the 10 largest plants in the world. In fact, Metropolitan is the largest distributor of treated drinking water in the United States. The District imports water from the Feather River in Northern California and the Colorado River to supplement local supplies. It also helps its member agencies develop water recycling, storage and other local resource programs to provide additional supplies and conservation programs to reduce regional demands.

-Largest treatment plant is the Jensen plant, with a capacity of 750 mgd

-Also have 16 hydroelectric facilities, with the largest being Yorba Linda at 5.1 mw

System Processes

Types of Water Treatment:

• Ozone
• Conventional (along with large sedimentation basins) and direct filtration

Types of Monitoring (Quality & Quantity):

• Operates 5 different treatment plants
  • Robert B. Diemer Treatment Plant with a treatment capacity of 520 million gallons a day
  • Joseph Jensen Treatment Plant with a treatment capacity of 750 million gallons a day
  •  Henry J. Mills Treatment Plant with a treatment capacity of 220 million gallons a day
  • Robert A. Skinner Treatment Plant with a treatment capacity of 630 million gallons a day
  • F. E. Weymouth Treatment Plant with a treatment capacity of 520 million gallons a day

Digital Networks in use (SCADA, AMI/AMR, Billing, BMS):

• SCADA

Cloud-Based Tools in use:

• InVizion: InVizion software provides planners and analysts with an organization tool from which to start planning, tracking, forecasting, reporting, and conducting what-if and decision-making analyses- without manipulation of spreadsheets or cumbersome user-interfaces

Some key capital programs are set up to increase infrastructure reliability.

• Colorado River Aqueduct Reliability - Projects under this program will replace or refurbish facilities on the Colorado River Aqueduct system in order to reliably convey water to Southern California.

• Treatment Plant Reliability - Projects under this program will replace or refurbish components at Metropolitan's five water treatment plants in order to reliably meet treated water demands and comply with all applicable water quality regulations.

• Distribution System Reliability - Projects under this program will replace or refurbish existing facilities within Metropolitan's distribution system, including reservoirs, pressure control structures, hydroelectric power plants, and pipelines in order to reliably meet water demands.

• Prestressed Concrete Cylinder Pipe Rehabilitation - Projects under this program will refurbish or replace Prestressed Concrete Cylinder Pipe lines to maintain water deliveries without unplanned shutdowns.

• System Reliability – Projects under this program will improve or modify facilities throughout Metropolitan's service area in order to utilize new processes and/or technologies, and to improve facility safety and overall reliability. These include projects related to Metropolitan's Supervisory Control and Data Acquisition (SCADA) system and other Information Technology projects.  

Conservation programs:

•  bewaterwise.com is the website providing information on rebates, water saving incentives programs, grants , surveys etc.
• The watering index is a scientifically based number (uses ET data) used to help save considerable amount of water by guiding the amount of water used by sprinkler system with weather change.