2026 Nitrogen Oxides Regulations 
Union of Concerned Scientists
AUGUST 22, 2022
California’s air pollution regulator, the Air Resources Board, is poised to adopt one of the most important steps that the state has ever taken to reduce exposure to air pollution and limit climate changing emissions. The ACCII regulations have several key components that make sure gasoline tailpipe pollution is greatly reduced.
Union of Concerned Scientists
DECEMBER 15, 2022
The EPA is getting ready to finalize a critical regulation limiting emissions of smog-forming nitrogen oxide (NO X ) and soot (or particulate matter, PM 2.5 ) from new heavy-duty trucks. State regulations have strict inducements, so the degree to which EPA aligns with such parameters is important.
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Union of Concerned Scientists
AUGUST 17, 2023
gigawatts of capacity from gas plants are planned to go online from 2023 to 2026. But gas plants also release emissions of nitrogen oxides, more commonly referred to as NOx emissions, that contribute to smog and other pollutants. NOx emissions stick around locally, with major health consequences to nearby residents.
Union of Concerned Scientists
DECEMBER 21, 2023
But while greenhouse gas emissions may be reduced, a delivery fulfilled by a diesel-burning truck may lead to increases in emissions of smog-forming nitrogen oxides and lung-damaging particulate matter. The number of available electric truck models in the US and Canada has surpassed 180.
Union of Concerned Scientists
MARCH 26, 2024
By 2032, new light-duty vehicle climate emissions would decrease by nearly 50 percent (to 85 grams/mile) compared to existing standards that go through 2026. The overall combination of reductions in particulate matter, nitrogen oxides and other air pollutants are expected to deliver $13 billion in annual health benefits.
Union of Concerned Scientists
NOVEMBER 28, 2023
EPA considering a range of alternatives EPA proposed standards that would aim to reduce greenhouse gas tailpipe emissions by about 70 percent compared to today’s vehicles (or about a 60 percent reduction from the 2026 standards currently on the books), to a lab certification level of emissions of 82 grams per mile (g/mi) by 2032.
Union of Concerned Scientists
APRIL 13, 2023
While EPA has projected gasoline vehicles to improve by close to 20 percent between now and 2032 in order to meet its standards, largely the result of standards already on the books through 2026, this could and must be closer to 30-35 percent to be consistent with our urgent need to address climate change.
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