America's Cleanest Cities, 2011

Here are the Five Cleanest Cities in America:

No. 5: Las Vegas, NV

No. 5: Las Vegas, Nev.
Metropolitan Statistical Area (MSA): Las Vegas-Paradise, Nev.
Air quality rank: 40
Water quality rank: 12
Superfund rank: 7
Pounds of on-site toxic releases (2009): 1.3 million

No. 4: Orlando, FL

No. 4: Orlando, Fla.
MSA: Orlando-Kissimmee, Fla.
Air quality rank: 15
Water quality rank: 16
Superfund rank: 19
Pounds of on-site toxic releases (2009): 1.6 million

No. 3: Raleigh, NC

No. 3: Raleigh, N.C.
MSA: Raleigh-Cary, N.C.
Air quality rank: 41
Water quality rank: 1
Superfund rank: 24
Pounds of on-site toxic releases (2009): 492,000

No. 2: Little Rock, AR

No. 2: Little Rock, Ark.
MSA: Little Rock-North Little Rock-Conway, Ark.
Air quality rank: 31
Water quality rank: 2
Superfund rank: 11
Pounds of on-site toxic releases (2009): 439,000

No. 1: McAllen, TX

No. 1: McAllen, Texas
MSA: McAllen-Edinburg-Mission, Texas
Air quality rank: 5
Water quality rank: 19
Superfund rank: 1
Pounds of on-site toxic releases (2009): 446 pounds