EPA Proposed New Hampshire Emissions Program Exit
The EPA is considering allowing New Hampshire to leave an ozone control zone and end its vehicle inspection program.
Updated on Sept. 23, 2026 in Asthma
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The Environmental Protection Agency published proposals on August 11, 2026, to allow New Hampshire to exit the Ozone Transport Region and remove its vehicle emissions inspection program from federal air quality plans. The change would follow the state's request to end the testing requirement for residents.
Why it matters
The proposal addresses regional air quality management and state oversight of vehicle emissions. It follows projections that nitrogen oxides and other pollutants will continue to decline in the state even without the testing program.
Between 2022 and 2024, all 12 air monitoring sites in New Hampshire recorded ozone levels at or below 65 parts per billion, staying under the federal limit of 70 parts per billion. The EPA's findings also indicated the state does not significantly contribute to ozone issues in downwind regions.
The players
Environmental Protection Agency
The federal agency responsible for setting and enforcing national air quality standards.
Kelly Ayotte
The Governor of New Hampshire who signed legislation to repeal the state's vehicle emissions testing.
The details
The proposal grants the state's request to leave the Ozone Transport Region, provided it commits to the inspection program as a backup measure. Projections suggest that carbon monoxide, volatile organic compounds, and nitrogen oxide emissions will decrease by 2026 without the inspection program. Currently, the EPA has set a deadline of September 25, 2026, for public feedback before finalizing the shift.
Timeline
June 2025: Gov. Kelly Ayotte signed a law repealing the emissions testing program.
December 24, 2025: New Hampshire requested EPA approval to leave the region.
Early 2026: The state's vehicle inspection program ended.
August 11, 2026: The EPA published the proposals.
September 25, 2026: Deadline for public comments on the EPA proposals.
Health Landscape
The potential exit from the Ozone Transport Region marks a significant change in the state's approach to regional air quality management. This follows a long-standing national trend of states seeking localized control over emissions programs based on demonstrated air quality improvements.
Residents should remain aware that the final decision on the vehicle emissions inspection program is not expected until the end of 2026. If you have concerns about how local air quality or shifts in environmental policy affect your respiratory health, consult with your physician.
The takeaway
The EPA is currently weighing whether New Hampshire can exit the regional air quality control zone based on current ozone monitoring data. Residents who have concerns regarding local pollution trends are encouraged to monitor public comment windows and discuss individual health impacts with their doctor.
Further reading
For more information on how air quality affects respiratory health, see our guide on Asthma.
Source note: This article includes information reported by The Daily Caller.
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