The Guardian has an interactive map of the United States showing where air pollution is worse. Locally, the area just east of the Hudson River throughout the Hudson Valley has the worst air quality. The Catskill and Albany areas also have worse air quality, and from Copake south along the border with Connecticut is another zone with lower air quality, according to the map based on information from the Center for Air, Climate, & Energy Solutions. The city of Hudson, for instance, has 6.6 micrograms of fine particulate matter per cubic meter on average from 2011-2015, according to the map. The World Health Organization considers 5 micrograms its safe level. See the map where you can plug in your zip code and find results at The Guardian website.