Conservation In Action

Does conservation actually work?cnservation

Yes! Conservation is an important operational tool that can generate savings of 1,000 megawatts statewide – equal to the output of two large power plants or enough electricity to power 1 million households.

Previous Success - With Conservation

On July 1st and 2nd, 2013 a Flex Alert was called by the California ISO for Northern California. California businesses, residents, local governments and organizations responded quickly and conserved energy.

The graph below represents the day-ahead forecast for energy demand (dotted purple line) vs. the actual demand on July 2nd, 2013 (solid blue line). Not only did demand drop overall but Californians also did their part to put-off using energy until after peak hours, illustrated by the bump in energy use at 8 pm! (20:00 hrs on the graph)

Energy Outlook, July 2, 2013


Without Conservation

Compare the graph above to a typical non-Flex Alert day, pictured below. On days such as these, when there is no call for conservation, the actual demand (solid blue line) often exceeds day-ahead predictions (dotted purple ine). This is not problematic, unless demand threatens to outstrip supply. When officials become aware of a potentially precarious day, they call a Flex Alert, and Californians work together to bring demand down.

Energy Outlook, June 27, 2013


Demand Response Programs

Demand Response Programs provide incentives and other benefits to business owners and residential homeowners who can reduce their energy use when needed.

Watch PG&E's Demand Response video to understand why demand response programs work to help reduce energy demand when supply is short.

Investor-Owned Utilities – Demand Response Programs

ad-pge-logoPacific Gas and Electric Company (PG&E)

sdgeconnectedlogoSan Diego Gas & Electric Company (SDG&E)

sce logoSouthern California Edison (SCE)


Note: Pacific Power Company and Sierra Pacific Power utilities are not actually part of the California ISO Balancing Authority.


Click on the links below to see utility homepages or Demand Response Programs offered.

Alameda Municipal Power

Anaheim Public Utilities

Azusa Light & Water Department

Banning Electric Department

Biggs City Electric Utility

Burbank Water and Power

CCSF (also called Power Enterprise of San Francisco Public Utilities Commission)

Cerritos, City of Cerritos Electric Utility

City of Industry

Colton Public Utilities

Corona, City of Department of Water and Power

Eastside Power Authority

Glendale Water and Power

Gridley Electric Utility

Healdsburg, City of Electric Department

Hercules Municipal Utility

Imperial Irrigation District (IID)

Kirkwood Meadows Public Utility District

Lassen Municipal Utility District

Lodi Electric Utility

Lompoc, City of, Electric Division

Los Angeles Department of Water & Power (LADWP)

Merced Irrigation District (MeID)

Modesto Irrigation District (MID)

Moreno Valley Utility (MVU)

Needles, City of (Public Utility Authority)

Palo Alto, City of

Pasadena Water and Power

Pittsburg, City of

Port of Oakland

Port of Stockton

Power and Water Resources Pooling Authority (PWRPA)

Rancho Cucamonga Municipal Utility

Redding Electric Utility

Riverside, City of, Public Utilities Department

Roseville Electric

Sacramento Municipal Utility District (SMUD)

Shasta Lake, City of

Shelter Cove Resort Improvement District (RID)

Silicon Valley Power (SVP)

Trinity Public Utility District (PUD)

Truckee Donnor Public Utility District (TDPUD)

Turlock Irrigation District (TID)

Ukiah, City of, Electric Utilities Division

Vernon, City of

Victorville Municipal Utilities Services


The energy grid is a highly complex network of generating facilities, voltage transformers, and distribution lines. Browse the articles below to get a better sense of where we get our power, how it gets to you, and how demand response efforts can lighten the load.

California's Electric Grid:  This overview explains California's energy grid from generator to light bulb. Learn about the relationship between generating stations, power utilities, and the grid operators who balance supply with demand.

Peak Demand:  Peak power demand is the most important variable in ensuring reliable power across the grid, and planning for the future. Find out how power demand fluctuates throughout the day and seasons, and why reducing power usage at peak periods is critical to the grid.

Helpful Resources:

The 2014 SUMMER LOADS AND RESOURCES ASSESSMENT by the California ISO (pdf 68 pages) provides an analysis of the upcoming summer supply and demand outlook in the California Independent System Operator balancing authority.