HIGH OZONE DAYS
Ozone Grade: F
Orange Ozone Days: 130
Red Ozone Days: 11
Purple Ozone Days: 1
The western portion of Nevada County, including the Cities of Grass Valley and Nevada City, has failed to meet reasonable health based standards for air quality and have been designated "non-attainment" zones for ozone pollution by the federal government. Ozone pollution is increasing in Western Nevada County and exceeded national standards in2008 on 142 days.
Western Nevada County is the 1st most ozone polluted rural county in the United States. Ozone pollution in Nevada County is significantly worse than in areas commonly associated with air pollution, including New York City; Chicago, Illinois; Washington, DC; Las Vegas, Nevada; and many other US cities.
According to the U.S. Environmental Protection Agency and the American Lung Association, ozone is a powerful respiratory irritant that can lead to shortness of breath, chest pain, wheezing, coughing, and premature death. Repeated exposure to high levels of ozone also leads to reductions in lung function, inflammation of the lung lining and increased respiratory discomfort, and irreversible damage in developing lungs. The U.S. EPA estimates that one out of three residents of Nevada County is at risk of experiencing health problems from ground level ozone.
The majority of Nevada County’s ozone is transported by wind from the Sacramento and San Francisco Bay Areas, and nearly half of all ozone is the result of on-road motor vehicle exhaust.
Quotes from an 06 petition to State Senator.
America's most polluted cities includes us in the Sacramento Area.