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10 Most Polluted Cities in the U.S.

Cities with the Most Short-Term Particulate Pollution
#1: Bakersfield-Delano, CA
#2: Fresno-Madera, CA
#3: Hanford-Corcoran, CA
#4: Los Angeles-Long Beach-Riverside, CA
#5: Modesto, CA
#6: Pittsburgh-New Castle, PA
#7: Salt Lake City-Ogden-Clearfield, UT
#8: Logan, UT-ID
#9: Fairbanks, AK
#10: Merced, CA

Cities with the Most Ozone Pollution
#1: Los Angeles-Long Beach-Riverside, CA
#2: Visalia-Porterville, CA
#3: Bakersfield-Delano, CA
#4: Fresno-Madera, CA
#5: Hanford-Corcoran, CA
#6: Sacramento–Arden-Arcade–Yuba City, CA-NV
#7: San Diego-Carlsbad-San Marcos, CA
#8: Houston-Baytown-Huntsville, TX
#9: San Luis Obispo-Paso Robles, CA
#10: Merced, CA

Hey, strong showing in all three by Bakersfield, L.A., and Hanford-Corcoran—nice work fellas; way to hustle.

If you’re looking for a silver lining in a report as inherently depressing as this one, at least there’s this: 22 of the 25 most polluted cities showed signs of improvement from last year’s report. And that, ladies and gentlemen, is why we need tough air quality standards and plans to reduce traffic congestion—they work!—and we need them to keep getting stricter and more progressive, until 41 percent of the country isn’t breathing polluted air.

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5:11AM PST on Feb 9, 2014

thank you

10:24AM PDT on Mar 28, 2013

Just imagine living in China!!!

6:11AM PDT on Mar 22, 2013


1:59PM PDT on Mar 21, 2013

Glad that I dont live in any of them, but I have been to number 3 and 6. Also number 10 is my homestate.

11:39AM PDT on Mar 21, 2013

I am surprised that Houston is not in the top 10

6:43AM PDT on Jun 21, 2012

California is not looking very good.

6:21AM PDT on May 14, 2012

Thank you for the info Recevoir mon numéro rio ou mon numéro rio afin de quitter mon opérateur mobile aisément et sans frais

5:12PM PDT on May 7, 2012


12:41PM PDT on May 3, 2012

oh God, that is so sad! the ones who can do something about it should start thinking, if not their health, their children's!!

4:39AM PDT on Apr 30, 2012

I don't think people are so dirty, you have some trips on the wrong side.
A booo to yo,


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