Green Car Congress

OCTOBER 1, 2015

issued its final rule revising the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb) from 75 ppb to protect public health. Ground-level ozone forms when nitrogen oxides (NO x ) and volatile organic compounds (VOCs) react in the air. The US Environmental Protection Agency (EPA).

Ozone 150

Ozone EPA Standards District of Columbia 150

Green Car Congress

SEPTEMBER 15, 2020

Under the proposed settlement, lodged with the US District Court for the District of Columbia, Daimler will recall and repair the emissions systems in Mercedes-Benz diesel vehicles sold in the United States between 2009 and 2016 and pay $875 million in civil penalties and roughly $70.3 million in other penalties.

District of Columbia 286

District of Columbia Emissions Diesel Mercedes 286

Green Car Congress

AUGUST 22, 2014

RFG is currently used in 17 states and the District of Columbia. The purpose of the federal RFG program is to improve air quality in certain areas through the use of gasoline that is reformulated to reduce motor vehicle emissions that lead to the formation of ground-level ozone.

EPA 239

EPA Gasoline Ozone District of Columbia 239

Green Car Congress

OCTOBER 15, 2009

State level ozone emissions in the NBP, from 1990 to 2010 (projected). This market-based cap and trade program was created to cost-effectively reduce NO x emissions during the ozone season. Source: EPA. Click to enlarge.

United States 199

United States District of Columbia Ozone 2008 199