Most Polluted Metropolitan Areas and Counties
Table 1:
People at Risk In 25 U.S. Cities Most Polluted by Short-Term Particle Pollution (24-Hour PM2.5) Table 2:
People at Risk In 25 U.S. Cities Most Polluted by Year-Round Particle Pollution (Annual PM2.5)
Table 3:
People at Risk In 25 Counties Most Polluted by Short-Term Particle Pollution (24-Hour PM2.5)
Table 4:
People at Risk In 25 Counties Most Polluted by Short-Term Particle Pollution (24-Hour PM2.5)
People at Risk In 25 U.S. Cities Most Polluted by Short-Term Particle Pollution (24-Hour PM2.5)
2005 Rank | Metropolitan Statistical Areas |
Total Population |
1 | Los Angeles Long Beach Riverside, CA |
17,262,730 |
2 | Fresno- Madera,CA |
850,325 |
3 | Bakersfield,CA | 713,087 |
4 | Pittsburgh- New Castle,PA |
2,503,738 |
5 | Eugene- Springfield,OR |
330,527 |
6 | Salt Lake City-Ogden- Clearfield,UT |
1,536,187 |
7 | Sacramento- Arden-Arcade- Truckee, CA-NV |
2,115,019 |
8 | Cleveland- Akron- Elyria,OH |
2,944,276 |
9 | Visalia- Porterville,CA |
390,791 |
10 | Birmingham- Hoover-Cullman,AL |
1,150,916 |
11 | Detroit- Warren- Flint,MI |
5,415,338 |
12 | Washington- Baltimore- Northern Virginia,DC- MD-VA-WV |
7,910,633 |
13 | Louisville- Elizabethtown- Scottsburg,KY-IN |
1,323,199 |
13 | Chicago- Naperville- Michigan City,IL-IN-WI |
9,549,014 |
15 | Provo- Orem,UT |
406,851 |
15 | Hanford- Corcoran,CA |
138,564 |
17 | Weirton- Steubenville, WV-OH |
128,569 |
18 | Cincinnati- Middletown- Wilmington,OH-KY-IN |
2,089,089 |
19 | Modesto,CA | 492,233 |
20 | Philadelphia- Camden- Vineland,PA- NJ-DE-MD |
5,922,253 |
20 | San Diego- Carlsbad-San Marcos,CA |
2,930,886 |
22 | Allentown- Bethlehem- Easton, PA-NJ |
768,036 |
23 | San Jose-San Francisco- Oakland,CA |
7,154,350 |
24 | Harrisburg- Carlisle- Lebanon,PA |
640,120 |
25 | New York- Newark- Bridgeport,NY- NJ-CT-PA |
21,766,731 |
People at Risk In 25 U.S. Cities Most Polluted by Year-Round Particle Pollution (Annual PM2.5)
2005 Rank | Metropolitan Statistical Areas |
Total Population |
1 | Los Angeles- Long Beach- Riverside,CA |
17,262,730 |
2 | Bakersfield,CA | 713,087 |
3 | Visalia- Porterville,CA |
390,791 |
4 | Pittsburgh-New Castle,PA |
2,503,738 |
5 | Fresno- Madera,CA |
850,325 |
6 | Detroit-Warren- Flint,MI |
5,415,338 |
7 | Hanford- Corcoran,CA |
138,564 |
8 | Cleveland-Akron- Elyria,OH |
2,944,276 |
9 | Atlanta-Sandy Springs- Gainesville,GA |
4,929,880 |
10 | Weirton- Steubenville, WV-OH |
128,569 |
10 | Cincinnati- Middletown- Wilmington, OH-KY-IN |
2,089,089 |
12 | New York- Newark- Bridgeport, NY-NJ-CT-PA |
21,766,731 |
12 | Chicago- Naperville- Michigan City,IL-IN-WI |
9,549,014 |
14 | St. Louis-St. Charles- Farmington,MO-IL |
2,793,856 |
15 | Canton- Massillon,OH |
407,118 |
15 | Birmingham- Hoover-Cullman,AL |
1,150,916 |
17 | Charleston,WV | 306,836 |
18 | York-Hanover- Gettysburg,PA |
491,375 |
18 | Merced,CA | 231,574 |
18 | Lancaster,PA | 482,775 |
21 | Louisville- Elizabethtown- Scottsburg,KY-IN |
1,323,199 |
22 | Indianapolis- Anderson- Columbus,IN |
1,912,560 |
22 | Columbus- Marion- Chillicothe,OH |
1,900,497 |
24 | Washington- Baltimore- Northern Virginia,DC-MD-VA-WV |
7,910,633 |
24 | Huntington- Ashland,WV-KY-OH |
286,517 |
People at Risk In 25 Counties Most Polluted by Short-Term Particle Pollution (24-Hour PM2.5)
2005 Rank | County | State | Total Population |
1 | Riverside | CA | 1,782,650 |
2 | Fresno | CA | 850,325 |
3 | Kern | CA | 713,087 |
4 | Los Angeles | CA | 9,871,506 |
5 | Allegheny | PA | 1,261,303 |
6 | San Bernardino | CA | 1,859,678 |
7 | Lane | OR | 330,527 |
8 | Orange | CA | 2,957,766 |
9 | Salt Lake | UT | 924,247 |
10 | Sacramento | CA | 1,330,711 |
11 | Cuyahoga | OH | 1,363,888 |
12 | Tulare | CA | 390,791 |
13 | Jefferson | AL | 658,141 |
14 | Klamath | OR | 64,769 |
15 | Wayne | MI | 2,028,778 |
16 | Baltimore City | MD | 628,670 |
17 | Lake | IN | 487,476 |
17 | Jefferson | KY | 699,017 |
19 | Kings | CA | 138,564 |
19 | Utah | UT | 398,059 |
21 | Jefferson | OH | 71,888 |
21 | Cook | IL | 5,351,552 |
23 | Hamilton | OH | 823,472 |
24 | Stanislaus | CA | 492,233 |
25 | Philadelphia | PA | 1,479,339 |
25 | San Diego | CA | 2,930,886 |
People at Risk In 25 Counties Most Polluted by Long-Term Particle Pollution (Annual PM2.5)
2005 Rank | County | ST | Total Population |
1 | Riverside | CA | 1,782,650 |
2 | San Bernardino | CA | 1,859,678 |
3 | Los Angeles | CA | 9,871,506 |
4 | Kern | CA | 713,087 |
5 | Tulare | CA | 390,791 |
6 | Allegheny | PA | 1,261,303 |
7 | Fresno | CA | 850,325 |
8 | Wayne | MI | 2,028,778 |
9 | Orange | CA | 2,957,766 |
10 | Kings | CA | 138,564 |
11 | Cuyahoga | OH | 1,363,888 |
12 | Fulton | GA | 818,322 |
13 | Hamilton | OH | 823,472 |
13 | Jefferson | OH | 71,888 |
15 | Lake | IN | 487,476 |
15 | New York | NY | 1,564,798 |
17 | Madison | IL | 261,689 |
18 | Hancock | WV | 31,742 |
19 | Cook | IL | 5,351,552 |
19 | Jefferson | AL | 658,141 |
19 | Stark | OH | 377,519 |
22 | Scioto | OH | 77,453 |
23 | Kanawha | WV | 195,413 |
24 | Merced | CA | 231,574 |
24 | Lancaster | PA | 482,775 |
24 | York | PA | 394,919 |