New Hampshire CO₂ Emissions
New Hampshire emitted 14 million metric tons of energy-related CO₂ in 2024, 0.3% of the US total. That ranks it 47th among the 50 states and the District of Columbia, at 9.7 metric tons per person.
Data year 2024 · Source: U.S. Energy Information Administration, State Energy Data System (June 2026)
How much CO₂ does New Hampshire emit?
New Hampshire produced 14 million metric tons of carbon dioxide from burning fossil fuels in 2024. The United States as a whole emitted 4.78 billion metric tons, so New Hampshire accounts for 0.3% of the national total.
Per person, that is 9.7 metric tons, 31% below the US average of 14.1 metric tons. On that measure New Hampshire ranks 42nd highest of 51.
CO₂ emissions in New Hampshire since 1990
Energy-related emissions in New Hampshire have fallen by 7% since 1990, from 15 million metric tons to 14 million metric tons. Compared with 2005, the baseline year for many US climate targets and marked on the chart, they have fallen by 36%. Emissions peaked in 2004 at 22 million metric tons and are now 38% below that level.
Emissions by sector
Transportation is the largest source of energy-related CO₂ in New Hampshire, at about 51% of the total, followed by residential at 18% and electric power at 15%.
Emissions by fuel
Petroleum produces about 75% of the state’s energy-related CO₂, natural gas 23% and coal 2%.
How New Hampshire compares with other states
These are the states closest to New Hampshire in the 2024 ranking by total emissions. See the full ranking of all states.
| # | State | Total (Mt) | Share of US | Per person (t) |
|---|---|---|---|---|
| 45 | Maine | 15.99 | 0.3% | 11.4 |
| 46 | South Dakota | 15.11 | 0.3% | 16.3 |
| 47 | New Hampshire | 13.60 | 0.3% | 9.7 |
| 48 | Delaware | 11.52 | 0.2% | 11.0 |
| 49 | Rhode Island | 11.05 | 0.2% | 9.9 |
Frequently asked questions
How much CO₂ does New Hampshire emit per year?
New Hampshire emitted 14 million metric tons of energy-related CO₂ in 2024, which is 0.3% of the US total of 4.78 billion metric tons.
What are the CO₂ emissions per person in New Hampshire?
About 9.7 metric tons per person in 2024, 31% below the US average of 14.1 metric tons. That ranks 42nd highest of 51.
Have emissions in New Hampshire fallen since 2005?
They have fallen by 36% since 2005 and fallen by 7% since 1990. Emissions peaked in 2004 at 22 million metric tons and are now 38% below that level.
What is the biggest source of CO₂ in New Hampshire?
Transportation is the largest sector, at about 51% of energy-related emissions, followed by residential at 18%. By fuel, petroleum accounts for 75%.
About the data. Figures are energy-related carbon dioxide emissions: CO₂ from burning coal, natural gas and petroleum, in million metric tons. Emissions from power plants are counted in the state where the electricity is generated, not where it is used. Other greenhouse gases and non-energy sources such as agriculture are not included.
Source: U.S. Energy Information Administration, State Energy Data System, released June 26, 2026. Latest year available: 2024.
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