Hawai‘i

50% by 2030 | Carbon negative by 2045

Relative to 2005 levels

Hawai‘i Pathways to Decarbonization

The 1990-2022 Greenhouse Gas Inventory was published in May 2025

Hawai‘i Climate Change Mitigation and Adaptation Commission

Climate Advisory Team (CAT)

Hawai‘i's Constitution states:

“Each person has the right to a clean and healthful environment, as defined by laws relating to environmental quality, including control of pollution and conservation, protection and enhancement of natural resources. Any person may enforce this right against any party, public or private, through appropriate legal proceedings, subject to reasonable limitations and regulation as provided by law.”

Justice40 Disadvantaged Tracts in Hawai‘i

Hawai‘i Green Infrastructure Authority

40% renewable energy by 2030 | 70% by 2040 | 100% by 2045

Executive Order 25-01 calls for the counties of Hawaiʻi, Kauaʻi, and Maui to achieve 100% renewable electricity production by 2035, and for Oʻahu to reduce its electricity sector emissions 70% below 2005 levels by 2035.

Oʻahu county to achieve 70% reduction by 2035 relative to 2005 levels

The Public Utilities Commission is required to evaluate Hawaii’s RPS every five years and report its findings to the Legislature.

The Department of Business, Economic Development, and Tourism is required to implement a plan to transition the State to a clean energy economy.

State of Hawai‘i Report to the 2024 Legislature on Hawaii’s Renewable Portfolio Standards

Hawaii received a C grade from Freeing the Grid.

The public utilities commission is prohibited from issuing or renewing permits for covered source facilities that burn coal for electricity generation after December 31, 2022.

The statewide energy code for residential construction is 2018 IECC with amendments.

The statewide energy code for commercial building construction is 2018 IECC and ASHRAE 90.1-2016.

The Hawai‘i Appliance Efficiency Standards apply to 10 products.

Hawai‘i will receive $18.1M to develop and adopt a building performance standard through the federal Inflation Reduction Act's Support for Building Energy Codes and Innovative Codes.

Electric utilities are required to achieve a 6,000 gigawatt-hour reduction in electricity use by 2045.

The Public Utilities Commission is required to establish additional interim targets for electricity use reduction by 2035 and 2040.

Hawai‘i has enacted commercial PACE-enabling legislation and has an active program.

The Diesel Replacement Rebate Program provides rebates up to 45% of project cost for the replacement of medium- and heavy-duty diesel vehicles with new, battery-electric equivalents.

30% of the state's light-duty vehicle fleet are ZEVs by 2025 | 60% are ZEVs by 2030 | 100% are ZEVs by 2035

Requires that places of public accommodation with at least 100 parking spaces available for use by the general public have at least one parking space equipped with an electric vehicle charging system. Chargers must be at least a Level 2 charging station that is network-capable.

The EV Charging Stations rebate program offers rebates for the purchase and installation of EV chargers for commercial entities, workplaces, and multifamily dwellings, up to $4,500 for Level 2 and up to $35,000 for direct current (DC) fast chargers.

Net-zero emissions by 2045

The Hawai‘i Carbon Smart Land Management Assistance Pilot Program provides compensation to producers for practices that increase soil health through June 30, 2025.

The Farmer Apprenticeship Mentoring Program (FMAP) aims to improve soil health and support a whole farm system approach to sustainable agriculture.