Serving the southwestern United States in solving complex energy, air pollution, and decarbonization challenges since 2001 by leading the effort to advance energy efficiency in the utilities, buildings, transportation, and industrial sectors.

Latest News

December 22 , 2025 · by SWEEP

Progress against the odds: SWEEP’s top 12 energy efficiency wins of 2025

December 22, 2025 | SWEEP Staff ———————————————————- From federal funding cuts to policy rollbacks, it’s without a doubt been...

December 18 , 2025 · by SWEEP

From patchwork to progress: How Colorado sparked the Southwest’s energy code revolution 

December 18, 2025 | Robin Yochum, Buildings Program Associate, SWEEP ———————————————————- Buildings account for nearly 40% of U.S. energy...

December 17 , 2025 · by SWEEP

Colorado regulators approve grid investments  

Plan will allow Xcel Energy to upgrade its electricity distribution system to power more EVs and appliances while containing costs  

December 11 , 2025 · by SWEEP

New analysis shows Colorado can meet emissions reduction goals, save Coloradans money

Study outlines pathways for future Colorado leaders to address the impacts of climate change, like wildfires and drought, hold...

SWEEP Programs

SWEEP promotes the improvement of utility energy efficiency programs, beneficial electrification, sustainable building codes and regulations, and the advancement of clean transportation in the Southwest. In addition, we advocate for energy equity in vulnerable communities and cost savings for homeowners and commuters through data driven decarbonization solutions.

Resources & Publications

Publications, reports, fact sheets, white papers, bill explainers, and other resources authored by SWEEP experts.

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About SWEEP

The Southwest Energy Efficiency Project (SWEEP) is a public-interest organization promoting greater energy efficiency and clean transportation in Arizona, Colorado, Nevada, New Mexico, Utah, and Wyoming. For over two decades, SWEEP’s work has dictated and supported the Southwest region’s forward-thinking progress in advancing energy efficiency and electric vehicles.