Warren: B
The ozone smog category is just one of the metrics that the ALA uses; they also measure particle pollution and the Garden State does just fine in that category. Most of New Jersey’s counties got A’s or B’s in that category, with the lone exception being Camden County’s C. According to the American Lung Association:
"There are still dozens of days when the air pollution levels are high enough to harm health and trigger asthma attacks, heart attacks and stroke, placing children, older adults, and people living with chronic lung and heart disease at particular risk. Ozone and particle pollution are the nation's most harmful and widespread air pollutants, and both can be deadly. In addition, more exposure to particle pollution is linked to worse health outcomes from COVID-19, including more deaths."