Green Car Congress

AUGUST 22, 2023

The Environmental Protection Agency (EPA) announced a new review of the Ozone National Ambient Air Quality Standards (NAAQS). EPA established the current standards at a level of 70 parts per billion in 2015 and retained them in 2020, after concluding that there was little new information to suggest the need for revision.

Ozone 150

Ozone EPA Standards Pollution 150

Green Car Congress

FEBRUARY 11, 2020

Daily exposure to ground level ozone in cities worldwide is associated with an increased risk of death, according to the largest study of its kind, published in an open-access paper in The BMJ. Ground level ozone is a highly reactive gas commonly found in urban and suburban environments, formed when pollutants react in sunlight.

Ozone 243

Ozone Pollution Global South America 243

Green Car Congress

NOVEMBER 26, 2014

Counties where measured ozone is above proposed range of standards, based on 2011-2013 monitoring data. Earlier this year, EPA staff had recommended the further reduction of this primary ozone standard from the current 75 ppb (parts per billion) to a revised level within the range of 70 ppb to 60 ppb—and preferably below 70 ppb.

Ozone 273

Ozone EPA Standards 2015 273

Green Car Congress

AUGUST 12, 2016

The first peer-reviewed study to directly quantify how emissions from oil and natural gas (O&NG) activities influence summertime tropospheric ozone (O 3 ) pollution in the Colorado Front Range confirms that chemical vapors from oil and gas activities are a significant contributor to the region’s chronic ozone problem.

Ozone 150

Ozone Oil Gas Emissions 150

Green Car Congress

SEPTEMBER 14, 2015

The National Academies have released a third review of the 21 st Century Truck Partnership (21CTP); the review follows the Phase 1 and Phase 2 reviews by the National Research Council in 2008 and 2012 ( earlier post ) and assesses the progress the partnership has made. A pathway to achieve 55% is being developed.

MPG 150

MPG Miles 2009 Fuel 150

Green Car Congress

FEBRUARY 11, 2014

Many of the strategies employed to reduce GHG emissions will also work to meet the national ambient air quality standard for ozone in 2032. Major transportation related policies already in place are: The Low Carbon Fuel Standard (LCFS). Background. —Draft Scoping Plan Update.

Transportation 273

Transportation Emissions California Ozone 273

Green Car Congress

JANUARY 27, 2015

The study exposed laboratory rats 80 hours a week, for up to 30 months, to emissions from a heavy-duty diesel engine meeting 2007 US EPA standards using new filters and other control technology. The ACES results are expected to play an important role in future risk reviews of diesel engines by international and US agencies.

Exhaust 150

Exhaust Diesel Engine 2007 150