The Energy Commission's Power Source Disclosure program provides consumers a detailed view into the sources of energy and associated greenhouse gas emissions their retail suppliers used to power their homes and businesses.

This information is provided through annual Power Content Labels, which resemble nutrition labels, with a breakdown of energy sources such as solar, wind, geothermal, nuclear, large hydroelectric, and natural gas. For comparison, the labels include a summary of California’s energy mix, which is called total system electric generation.

Retail electricity suppliers report their electricity purchases and retail sales to the Energy Commission each year. The reports are used to create the labels for each electricity portfolio offered the prior year. 

Tools and resources are available to help retail suppliers meet reporting requirements.

Power Content Labels
Find the labels for California retail electricity suppliers. Learn how to read the current labels and historical labels.

Resources for Retail Suppliers
Learn about reporting requirements, submittal deadlines, and template forms.

The Power Source Disclosure (PSD) program was established by Senate Bill (SB) 1305 (Stats. 1997, ch. 796) in an effort to provide retail electricity consumers “accurate, reliable, and simple to understand information on the sources of energy that are used to provide electric services.”1 In 2016, the California Energy Commission (Energy Commission) adopted modifications to the regulations to incorporate statutory changes to program rules and reporting requirements as required by Assembly Bill (AB) 162 (Stats. 2009, ch. 313) and AB 2227 (Stats. 2012, ch. 616). AB 1110 (Stats. 2016, ch. 656) modified the PSD Program and Power Content Label by requiring retail suppliers to disclose the greenhouse gas (GHG) emissions intensity (the rate of emissions per unit of electricity) associated with each electricity portfolio beginning in 2020 for the 2019 reporting year. AB 1110 also required the Energy Commission, among other things, to determine a format for disclosing unbundled renewable energy credits (RECs) as a percentage of annual retail sales.

The Power Source Disclosure program plans to initiate a rulemaking to amend its regulations in accordance with Senate Bill 1158 (Becker, Chapter 367, Statutes of 2022), which requires the reporting of hourly data to the Energy Commission starting in 2028, and Assembly Bill 242 (Holden, Chapter 228, Statutes of 2021), which establishes annual deadlines for retail suppliers to post and distribute their power content labels.

Upcoming Events

June 11, 2024 | 10:00 AM - 01:00 PM
Remote Access Only
The California Energy Commission (CEC) will host a rulemaking workshop to solicit feedback on proposed changes to the Power Source Disclosure (PSD) program regulations at California Code of Regulations, Title 20, Division 2, Chapter 3, Article 5 beginning with Section 1391, including changes required by Senate Bill (SB) 1158 (Becker, Chapter 367

Past Events

1 - 4 of 4 events
September 26, 2023 | 10:00 AM - 01:00 PM
Remote Access or In-Person
December 7, 2021 | 09:00 AM - 12:00 PM
Remote Access Only
December 11, 2019 | 10:00 AM - 05:00 PM
First Floor, Art Rosenfeld Hearing Room
October 7, 2019 | 01:30 PM - 05:00 PM
Art Rosenfeld Hearing Room


Power Source Disclosure Program


Power Source Disclosure