(AGENPARL) – mer 18 dicembre 2024 Issued: Dec 18, 2024 (10:00am EST)
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EPA Grants Waiver for California’s Advanced Clean Cars II Regulations
Agency additionally grants waiver for low-NOx regulations for heavy-duty and
off-road vehicles and engines
WASHINGTON – Today, the U.S. Environmental Protection Agency (EPA) is
granting two requests from the California Air Resources Board (CARB) for
waivers to implement and enforce its Advanced Clean Cars II (ACC II)
regulations for light-duty vehicles, and its “Omnibus” low-NOx regulation
for heavy-duty highway and off-road vehicles and engines. Under the Clean Air
Act, California is afforded the ability to adopt emissions requirements
independent from EPA’s regulations to meet its significant air quality
challenges. The state must seek a waiver from EPA for new motor vehicle
emission standards.
After reviewing the information provided by California, reviewing comments
submitted by the public, and applying the limited criteria for waiver review
under the Clean Air Act, EPA determined in each case that it would be
appropriate to grant both waiver requests. The records, included in the waiver
decisions, contain public comments on the programs’ feasibility, including
costs to manufacturers and the lead time provided. EPA’s review found that
opponents of the waivers did not meet their burden to show how either program
is inconsistent with the Clean Air Act.
“California has longstanding authority to request waivers from EPA to
protect its residents from dangerous air pollution coming from mobile sources
like cars and trucks,” said EPA Administrator Michael S. Regan. “Today’s
actions follow through on EPA’s commitment to partner with states to reduce
emissions and act on the threat of climate change.”
The ACC II program is a single coordinated package of requirements for model
year 2026 through 2035 and beyond for on-road light- and medium-duty engines
and vehicles. The ACC II regulations include revisions to both California’s
Low Emission Vehicle (LEV) and Zero Emission Vehicle (ZEV) regulations.
CARB projects that the ACC II program will reduce smog and soot-causing
pollutants – including fine particulate matter (PM2.5) as well as oxides of
nitrogen (NOx) and hydrocarbons (HC), which are precursors of ground-level
ozone – as well as reduce greenhouse gases and toxic air pollutants.
CARB projects that its Low-NOx standards will protect communities from
dangerous NOx pollution that mixes in the atmosphere to form ground-level
ozone, commonly called “smog,” which can lead to costly and harmful health
impacts such as increased illnesses, asthma attacks, lost days of work or
school, and hospitalizations.
EPA has taken public comment on both the ACC II and Low-NOx regulation 
waiver requests from state and local governments, health and environmental
organizations, industry, and other stakeholders. These final decisions are
based on those comments, as well as EPA’s evaluation of CARB’s requests
according to Clean Air Act requirements and other information in the record,
including that submitted by California. EPA maintains a webpage for
information on California waivers and authorizations that sets out EPA’s
administrative process for California waivers and authorization.
EPA continues reviewing additional waiver requests from California and is
working to ensure its decisions are durable and grounded by law.
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