U.S. Cities - Top Lists

Top 101 counties with the highest Particulate Matter (PM₁₀) Annual air pollution readings in 2005 (µg/m³)

1.	Maricopa County, AZ (Phoenix, Mesa, Glendale), pop. 3,072,149: 74

2.	Pinal County, AZ (Apache Junction, Casa Grande, Florence), pop. 179,727: 59

3.	St. Louis city, MO, pop. 348,189: 57

4.	Santa Cruz County, AZ (Nogales, Tubac, Patagonia), pop. 38,381: 57

5.	Inyo County, CA (Bishop, West Bishop, Lone Pine), pop. 17,945: 55

6.	Sandoval County, NM (Rio Rancho, Corrales, Bernalillo), pop. 89,908: 54

7.	Imperial County, CA (El Centro, Calexico, Brawley), pop. 142,361: 53

8.	Riverside County, CA (Riverside, Moreno Valley, Corona), pop. 1,545,387: 52

9.	El Paso County, TX (El Paso, Socorro, San Elizario), pop. 679,622: 51

10.	San Bernardino County, CA (San Bernardino, Ontario, Fontana), pop. 1,709,434: 51

11.	Jefferson County, AL (Birmingham, Hoover, Bessemer), pop. 662,047: 49

12.	Harris County, TX (Houston, Pasadena, Baytown), pop. 3,400,578: 49

13.	Washoe County, NV (Reno, Sparks, Sun Valley), pop. 339,486: 49

14.	Dona Ana County, NM, pop. 174,682: 48

15.	Douglas County, NE (Omaha, Ralston, Elkhorn), pop. 463,585: 48

16.	Scott County, IA (Davenport, Bettendorf, Eldridge), pop. 158,668: 46

17.	Tulare County, CA (Visalia, Tulare, Porterville), pop. 368,021: 44

18.	Los Angeles County, CA (Los Angeles, Long Beach, Glendale), pop. 9,519,338: 43

19.	Kern County, CA (Bakersfield, Delano, Oildale), pop. 661,645: 43

20.	Lexington County, SC (Seven Oaks, West Columbia, Cayce), pop. 216,014: 42

21.	Kings County, CA (Hanford, Lemoore, Avenal), pop. 129,461: 42

22.	Madison County, IL (Granite City, Alton, Collinsville), pop. 258,941: 41

23.	Bernalillo County, NM (Albuquerque, South Valley, North Valley), pop. 556,678: 41

24.	Cuyahoga County, OH (Cleveland, Parma, Lakewood), pop. 1,393,978: 41

25.	Camden County, NJ (Camden, Pennsauken, Lindenwold), pop. 508,932: 41

26.	Dawson County, NE (Lexington, Cozad, Gothenburg), pop. 24,365: 40

27.	Wayne County, MI (Detroit, Livonia, Dearborn), pop. 2,061,162: 40

28.	Allegheny County, PA (Pittsburgh, Bethel Park, Mount Lebanon), pop. 1,281,666: 40

29.	Clark County, NV (Las Vegas, Paradise, Henderson), pop. 1,375,765: 40

30.	McMinn County, TN (Athens, Etowah, Englewood), pop. 49,015: 39

31.	Adams County, CO (Aurora, Westminster, Thornton), pop. 363,857: 39

32.	Pima County, AZ (Tucson, Casas Adobes, Catalina Foothills), pop. 843,746: 39

33.	Fresno County, CA (Fresno, Clovis, Reedley), pop. 799,407: 39

34.	Northampton County, PA (Bethlehem, Easton, Northampton), pop. 267,066: 38

35.	Pennington County, SD (Rapid City, Rapid Valley, Box Elder), pop. 88,565: 38

36.	Salt Lake County, UT (Salt Lake City, West Valley City, Sandy), pop. 898,387: 37

37.	District of Columbia, DC, pop. 572,059: 36

38.	Cook County, IL (Chicago, Cicero, Arlington Heights), pop. 5,376,741: 36

39.	Cerro Gordo County, IA (Mason City, Clear Lake, Rockwell), pop. 46,447: 36

40.	Franklin County, OH (Columbus, Westerville, Upper Arlington), pop. 1,068,978: 35

41.	Columbiana County, OH (East Liverpool, Salem, Columbiana), pop. 112,075: 35

42.	Yuma County, AZ (Yuma, Fortuna Foothills, San Luis), pop. 160,026: 35

43.	Wyandotte County, KS (Kansas City, Bonner Springs, Edwardsville), pop. 157,882: 35

44.	St. Clair County, IL (Belleville, East St. Louis, O'Fallon), pop. 256,082: 35

45.	Jasper County, MO (Joplin, Carthage, Webb City), pop. 104,686: 34

46.	Cochise County, AZ (Sierra Vista, Douglas, Bisbee), pop. 117,755: 34

47.	Union County, TN (Maynardville, Luttrell, Sharps Chapel), pop. 17,808: 34

48.	West Baton Rouge Parish, LA (Port Allen, Addis, Brusly), pop. 21,601: 34

49.	Jefferson County, OH (Steubenville, Toronto, Wintersville), pop. 73,894: 34

50.	Pottawattamie County, IA (Council Bluffs, Carter Lake, Avoca), pop. 87,704: 33

51.	Sheridan County, WY (Sheridan, Story, Ranchester), pop. 26,560: 33

52.	Boyd County, KY (Ashland, Westwood, Catlettsburg), pop. 49,752: 33

53.	Mesa County, CO (Grand Junction, Clifton, Redlands), pop. 116,255: 32

54.	Lake County, IN (Gary, Hammond, East Chicago), pop. 484,564: 32

55.	Scioto County, OH (Portsmouth, Wheelersburg, West Portsmouth), pop. 79,195: 32

56.	Buchanan County, MO (St. Joseph, Agency, Rushville), pop. 85,998: 32

57.	Peoria County, IL (Peoria, Peoria Heights, Bartonville), pop. 183,433: 31

58.	Campbell County, WY (Gillette, Wright, Sleepy Hollow), pop. 33,698: 31

59.	Dallas County, TX (Dallas, Garland, Irving), pop. 2,218,899: 31

60.	Kay County, OK (Ponca City, Blackwell, Tonkawa), pop. 48,080: 30

61.	Clark County, IN (Jeffersonville, Clarksville, Sellersburg), pop. 96,472: 30

62.	Roanoke city, VA, pop. 94,911: 30

63.	Muskogee County, OK (Muskogee, Fort Gibson, Haskell), pop. 69,451: 30

64.	Davis County, UT (Layton, Bountiful, Clearfield), pop. 238,994: 30

65.	Converse County, WY (Douglas, Glenrock, Rolling Hills), pop. 12,052: 30

66.	Whitley County, IN (Columbia City, Tri-Lakes, South Whitley), pop. 30,707: 30

67.	Westmoreland County, PA (Greensburg, New Kensington, Lower Burrell), pop. 369,993: 30

68.	Lincoln County, MT (Libby, Eureka, Troy), pop. 18,837: 30

69.	Shelby County, TN (Memphis, Bartlett, Germantown), pop. 897,472: 30

70.	Hudson County, NJ (Jersey City, Union City, Bayonne), pop. 608,975: 30

71.	Hillsborough County, FL (Tampa, Brandon, Town 'n' Country), pop. 998,948: 29

72.	Cass County, NE (Plattsmouth, Eagle, Weeping Water), pop. 24,334: 29

73.	Georgetown County, SC (Georgetown, Murrells Inlet, Pawleys Island), pop. 55,797: 29

74.	Cameron County, TX (Brownsville, Harlingen, San Benito), pop. 335,227: 29

75.	Ramsey County, MN (St. Paul, Maplewood, Roseville), pop. 511,035: 29

76.	Stanislaus County, CA (Modesto, Turlock, Ceres), pop. 446,997: 29

77.	San Joaquin County, CA (Stockton, Lodi, Tracy), pop. 563,598: 29

78.	Marion County, IN (Indianapolis, Lawrence, Beech Grove), pop. 860,454: 28

79.	Cumberland County, ME (Portland, South Portland, Brunswick), pop. 265,612: 28

80.	Muscatine County, IA (Muscatine, West Liberty, Wilton), pop. 41,722: 28

81.	Davidson County, TN (Goodlettsville, Forest Hills, Oak Hill), pop. 569,891: 28

82.	Orange County, CA (Santa Ana, Anaheim, Huntington Beach), pop. 2,846,289: 28

83.	Spokane County, WA (Spokane, Opportunity, Dishman), pop. 417,939: 28

84.	Baltimore city, MD, pop. 651,154: 28

85.	Vanderburgh County, IN (Evansville, Highland, Melody Hill), pop. 171,922: 28

86.	Perry County, IN (Tell City, Cannelton, Troy), pop. 18,899: 28

87.	Philadelphia County, PA (Philadelphia), pop. 1,517,550: 28

88.	Bibb County, GA (Macon, Payne, Lizella), pop. 153,887: 28

89.	San Diego County, CA (San Diego, Chula Vista, Oceanside), pop. 2,813,833: 28

90.	Montgomery County, OH (Dayton, Kettering, Huber Heights), pop. 559,062: 28

91.	Merced County, CA (Merced, Los Banos, Atwater), pop. 210,554: 28

92.	Denver County, CO (Denver), pop. 554,636: 28

93.	Richland County, SC (Columbia, St. Andrews, Dentsville), pop. 320,677: 28

94.	St. Joseph County, IN (South Bend, Mishawaka, Granger), pop. 265,559: 28

95.	Brooke County, WV (Follansbee, Hooverson Heights, Wellsburg), pop. 25,447: 27

96.	Hamilton County, OH (Cincinnati, Norwood, Forest Park), pop. 845,303: 27

97.	Fulton County, GA (Atlanta, Sandy Springs, Roswell), pop. 816,006: 27

98.	La Salle County, IL (Ottawa, Streator, Peru), pop. 111,509: 27

99.	Mecklenburg County, NC (Charlotte, Huntersville, Matthews), pop. 695,454: 27

100.	Webb County, TX (Laredo, Rio Bravo, El Cenizo), pop. 193,117: 27

101.	St. Louis County, MO (Florissant, Chesterfield, University City), pop. 1,016,315: 27

Back to: Top 101 Lists, All U.S. Cities