BOSTON ( MainStreet) -- Relocating to one of the communities on a new list of "America's Least Congested Cities" could be a real breath of fresh air for consumers who suffer from allergies or other breathing problems. "I've been told stories of peoples' lives being infinitely changed for the better by moving to a new city and being able to breathe again," says Bert Sperling of Sperling's Best Places, which recently teamed up with Breathe Right Nasal Strips to compile the list. "Allergies can take a terrible toll on our quality of life." Sperling analyzed the 50 largest U.S. cities for roughly a dozen congestion-producing factors, from ragweed and ozone levels to wind speed and other climate conditions that spread allergens. Here's a rundown of the five communities the study found have the least problems with congestion -- along with a look at each city's local economy and housing market. Home values listed below reflect asking prices on Realtor.com, the National Association of Realtors' official property-listing site. Price ranges refer to all houses, condos and townhouses listed on the site inside a given city and within about 20 miles of its borders.