30 Most Polluted States in the US

1 – Nevada

Insider Monkey Score – 9

Nevada is the most polluted state in the US. Wise Voter ranks it as the fourth and U.S News ranks it as the seventh most polluted state.  The major cause of pollution in the state is ground-level ozone which is caused by vehicle combustion and wild fires.

Related articles: 

• 30 Most Polluted Cities in the U.S.
• 25 Most Polluted Countries in the World
• 25 Most Polluted Cities in the World

Disclosure: None. 30 Most Polluted States in the US is originally published at Insider Monkey.