13. Redding-Red Bluff, CA
Besides the ozone ranking (17th), this metropolitan area is ranked 66th for 24-hour particle pollution out of 186 metropolitan areas and 170th for annual particle pollution out of 184 metropolitan areas. Moreover, it is estimated there is 105 of those who are dealing with lung cancer and 14,770 of those with adult asthma.
![25 Most Polluted Cities in the US in 2017](https://imonkey-blog.imgix.net/blog/wp-content/uploads/2017/11/03173916/industry-1761801_1280-750x500.jpg?auto=fortmat&fit=clip&expires=1752710400&width=480&height=319)
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