Delivering low-emission energy

PG&E delivers some of the nation's cleanest electric power. Nearly 80 percent of the electricity we provide to our customers comes from sources that are greenhouse-gas free. In fact, PG&E's electricity is approximately two-thirds cleaner than the industry average, as measured by PG&E's carbon dioxide emissions rate.

Understanding our energy sources

About 80 percent of the electricity we deliver is a combination of renewable and greenhouse gas-free resources. For example, the power mix delivered in 2017 included:


  • Non-emitting nuclear generation (27 percent)
  • Large hydroelectric facilities (18 percent)
  • Eligible renewable resources, such as wind, geothermal, biomass, solar and small hydro (33 percent).
  • Natural gas/other (20 percent)
  • Unspecified power (2 percent). This electricity is not traceable to specific sources by any auditable contract trail.


PLEASE NOTE: Power mix includes all PG&E-owned generation plus PG&E's power purchases. Data is sourced from PG&E's Power Source Disclosure report, filed in June 2018.


View our 2017 electric power mix

PG&E's 2017 Electric Power Mix Chart


Delivering more renewable energy

We deliver a range of clean energy resources, such as solar, wind, geothermal, biomass and small hydro. We're also integrating innovative technology to make the power grid smarter and more resilient. In 2016, we delivered 32.8 percent of our energy from renewable resources and we are ahead of schedule in meeting the California Renewables Portfolio Standard (RPS) of 33 percent by 2020 mandate. We are also well on our way to meeting the 50 percent RPS by 2030 mandate under Senate Bill 350.


Harnessing the Sun's power

A portion of the solar energy on PG&E's energy grid comes from three solar plants in Fresno County and one Solano county that we own and operate. We add solar energy to our energy supply through significant contracts with third-party developers. Additionally, we support our customers who choose to install their own solar systems. PG&E leads the nation with more than 300,000 private rooftop solar customers connected to the energy grid. Those considering solar can learn more and find resources at Solar Programs.

With PG&E's Solar Choice program, customers have the option to purchase up to 100 percent of their electricity from solar generated within California, without needing to install private rooftop solar panels. This program is a choice if customers want to lower their environmental footprint and promote renewable power generation. Visit Solar Choice.


Managing our hydro operations

We own and operate one of the nation's largest investor-owned hydroelectric systems, which provides you and millions of other PG&E customers with a safe and reliable source of clean energy. Following are facts about our hydro operations:

  • Built along 16 river basins
  • Stretches nearly 500 miles, from Redding to Bakersfield
  • Has a generating capacity of nearly 3,900 MW total from 66 powerhouses
  • Includes a pumped storage facility
  • Relies on nearly 100 reservoirs


Investments in cleaner conventional sources

To ensure that we can meet your future energy needs, we have invested in state-of-the-art conventional generation facilities.


  • Gateway Generating Station. Compared to older fossil-fueled plants, this 580 MW station produces dramatically less carbon dioxide for every megawatt-hour produced. "Dry" cooling technology means the plant uses 97 percent less water.

  • Colusa Generating Station. Serving nearly half a million homes, this 657 MW combined cycle natural gas power plant uses state-of-the-art technology and environmental design.

  • Humboldt Bay Generating Station. Employing technology that produces significantly less sulphur dioxide, nitrogen oxide, and carbon dioxide emissions than the previous facility at the site, this 163 MW generating station eliminates the need for "once-through" cooling, a technique used in older fossil fueled plants.