For the report, ATTOM Data Solutions analyzed 8,665 U.S. zip codes with sufficient housing trend data for risk related to four environmental hazards: superfund sites, brownfields, polluters and poor air quality . Median home prices in zip codes in the top environmental hazard risk quintile increased 7.4 percent from a year ago on average ; increased 57.1 percent from 2012 ; and increased 22.2 percent from 2007 .
