Community Choice Aggregation

What Is It?


Community Choice Aggregation (CCA) is a tool that allows communities to pool energy demand of their residents and businesses in order to purchase electricity on their behalf. By pooling a large number of energy purchases into a single bundle, a CCA allows members to influence what kind of energy they buy, who they buy it from, and at what cost. A CCA is a market-based approach that is supported by its own revenue and is not reliant on taxpayer funds. There are currently six states (California, Illinois, Ohio, Massachusetts, New Jersey and Rhode Island) that have laws that allow communities to form CCAs.

Case Studies


Marin Energy Authority, California

The Marin Energy Authority (MEA) is the not-for-profit public agency formed by the County of Marin and all of Marin's cities and towns that administers the Marin Clean Energy (MCE) program. Marin Clean Energy is focused on delivering renewable electricity from various sources under contract. Residents that opt-in to the program can choose either 50% or 100% renewable electricity. For residential customers, cost are about the same with MCE residential customers paying about $0.91 per month more. For commercial customers, overall bills are slightly lower than under the existing utility. (more information)

Oak Park CCA, Illinois

The Village of Oak Park is bundling all of the electricity demand from local residents and businesses. They have contracted with a power supplier for 100% renewable electricity at rates that are 25% below what they had been under the utility. The estimated savings for electricity consumers in the town is $4.5 million over two years. The program went into effect on Jan. 1, 2012. (more information)

Cape Light Compact, Massachusetts

The Cape Light Compact is one of the longest serving CCAs in the nation. It is a public entity that was formed in 1997 to advance the interests of consumers in the newly restructured electricity industry in Massachusetts. Cape Light Compact serves 200,000 customers in 21 towns on Cape Cod and Martha's Vineyard. (more information)

CleanPowerSF, California

CleanPowerSF is the City of San Francisco's CCA program. It offers consumers an alternative to the local utility’s standard electricity offer with 100% renewable energy. Rates are higher than the standard utility offer, though CleanPowerSF aims to reduce prices over time as more renewable energy supplies come online. The program will be administered by the San Francisco Public Utilities Commission (SFPUC), the City's water, sewer and municipal power utility. CleanPowerSF is currently awating rate approval by the SFPUC. (more information)

Sonoma Clean Power, California

Sonoma Clean Power (SCP) is the new, locally controlled electricity provider in Sonoma County. SCP provides residential and business customers across the county the option of using power generated by renewable sources, like solar, wind and geothermal at competitive rates. SCP has launched with a standard product of 33% renewable power, matching California's Renewables Portfolio Standard (RPS) requirements years in advance. Sonoma Clean Power will reduce the amount of greenhouse gas emissions associated with electricity use in Sonoma County by an estimated 3.1 million tons over 20 years. SCP is a non-profit agency, independently run by the Sonoma County cities that have joined the program, including Sonoma, Santa Rosa, Cotati, Windsor, Cloverdale and Sebastopol, and the County, which represents unincorporated communities. (more information)

San Diego Energy District, California

The San Diego Energy District Foundation (a non-profit institution) was founded in 2011 to develop a Local Energy Cooperative, or CCA for the San Diego area. The CCA is not yet operational, but the Foundation has set goals of offering local residents and businesses a choice of either 50 or 100% renewable electricity, with at least half of that coming from locally sited solar panels on rooftops, parking lots and brownfields. The San Diego Energy District Foundation announced funding and initiation for the Technical and Feasibility Study authorized by the City of San Diego. (more information)


Chicago Municipal Aggregation Program, Illinois

In 2012, the voters of the City of Chicago authorized the City to aggregate and purchase electricity for residential and small business ratepayers. The City negotiated a new deal with its supplier that includes an increase in wind power from two in-state wind farms, in addition to getting rid of coal and nuclear from its portfolio. Chicago's electrical aggregation has led to a 16% reduction in carbon emissions according to a report released by the Perfect Power Institute at the Illinois Institute of Technology. (more information)

More Information