Asthma is thought to be aggravated, if not caused by, pollutants and allergens, including dust mites, dander and mold. So it may come as a surprise that New Jerseyans rank relatively low in asthma rates, as compared to the rest of the country. In 2009, 7.7% of adults said they were currently diagnosed with asthma, according to the Centers for Disease Control and Prevention. That compares with 8.8 percent nationally and is less than surrounding states: New York (9.8 percent), Connecticut (9.4), Pennsylvania (9.1) and Delaware (8.8). The states with the highest rates of asthma were Oregon (11.1 percent) and Arizona, Massachusetts and Maine, the last three with 10.8 percent. The lowest were Louisiana (6.3 percent), Texas (6.5) and Minnesota (6.6).