Link: https://www.denver7.com/news/local-news/denver-zip-code-named-the-most-polluted-in-the-country

Using data from ATTOM Data Solutions, RealtyTrac found the 80216 zip code, which includes Elyria-Swansea, Globeville and part of the River North neighborhood (RiNo), has the highest “environmental hazard risk” of more than 8,600 zips codes nationwide.

That risk assessment comes from four different environmental factors: Air quality, the number of pollution-generating facilities in the area, the number of Superfund cleanup sites and the number of brownfield sites, which are former industrial or commercial properties where redevelopment is difficult due to leftover pollution or contamination.

The fact that none of the Cancer alley zip codes show up in the top ten makes me think their criteria is missing something. Maybe they are heavily weighting population density?