By Ozone By Year Round Particle Pollution By Short-Term Particle Pollution #1: Los Angeles-Long Beach, CA #2: Bakersfield, CA #3: Fresno-Madera, CA #4: Visalia-Porterville-Hanford, CA #5: Phoenix-Mesa-Scottsdale, AZ #6: Modesto-Merced, CA #7: San Diego-Carlsbad, CA #8: Sacramento-Roseville, CA #9: New York-Newark, NY-NJ-CT-PA #10: Las Vegas-Henderson, NV-AZ #11: Denver-Aurora, CO #12: Houston-The Woodlands, TX #13: Dallas-Fort Worth, TX-OK #14: El Centro, CA #15: Fort Collins, CO #16: El Paso-Las Cruces, TX-NM #17: Redding-RedContinue reading “Most air polluted cities in California”