What’s the lowest PM 2.5 pollution?¶

If we can figure out the city with the maximum pollution, the city with the minimum pollution should be pretty easy to find as well.

This section uses the same data file that we have been using, but if you want to see all of the data click on the Show button below. Once it appears, you can hide it again by clicking on the Hide button.

Aberdeen, SD :13 :8
Adrian, MI :15 :9
Akron, OH :18 :11
Albany, GA :18 :11
Albany-Lebanon, OR :14 :8
Albany-Schenectady-Troy, NY :13 :8
Albuquerque, NM :12 :7
Alexandria, LA :20 :12
Allegan, MI :14 :9
Allentown-Bethlehem-Easton, PA-NJ :21 :12
Altoona, PA :19 :12
Anchorage, AK :13 :8
Anderson, IN :18 :11
Ann Arbor, MI :16 :10
Appleton, WI :14 :9
Asheville, NC :15 :9
Athens, OH :14 :9
Athens, TN :15 :9
Athens-Clarke County, GA :16 :9
Atlanta-Sandy Springs-Marietta, GA :23 :14
Atlantic City-Hammonton, NJ :14 :8
Augusta-Richmond County, GA-SC :18 :11
Augusta-Waterville, ME :14 :9
Austin-Round Rock, TX :17 :10
Bakersfield, CA :24 :15
Baltimore-Towson, MD :20 :12
Bangor, ME :12 :7
Baraboo, WI :17 :10
Baton Rouge, LA :19 :11
Bay City, MI :13 :8
Beaver Dam, WI :15 :9
Beckley, WV :14 :8
Bellingham, WA :7 :4
Bennington, VT :11 :7
Birmingham-Hoover, AL :20 :12
Bishop, CA :11 :6
Bismarck, ND :11 :6
Bloomington, IN :17 :10
Bloomington-Normal, IL :16 :9
Boise City-Nampa, ID :17 :10
Boone, NC :13 :8
Boston-Cambridge-Quincy, MA-NH :16 :10
Boulder, CO :12 :7
Bowling Green, KY :17 :10
Bradenton-Sarasota-Venice, FL :12 :7
Brainerd, MN :8 :5
Bremerton-Silverdale, WA :7 :4
Bridgeport-Stamford-Norwalk, CT :16 :9
Brigham City, UT :12 :7
Brookings, SD :14 :9
Brownsville-Harlingen, TX :16 :10
Brunswick, GA :13 :8
Buffalo-Niagara Falls, NY :16 :9
Burlington, NC :14 :9
Burlington-South Burlington, VT :12 :7
Butte-Silver Bow, MT :19 :11
Cadillac, MI :10 :6
Cambridge, MD :13 :8
Canton-Massillon, OH :21 :12
Cape Coral-Fort Myers, FL :12 :7
Casper, WY :9 :5
Cedar Rapids, IA :16 :10
Champaign-Urbana, IL :16 :10
Charleston, WV :18 :11
Charleston-North Charleston-Summerville, SC :16 :10
Charlotte-Gastonia-Concord, NC-SC :16 :10
Charlottesville, VA :13 :8
Chattanooga, TN-GA :18 :11
Cheyenne, WY :9 :6
Chicago-Naperville-Joliet, IL-IN-WI :22 :13
Chico, CA :12 :7
Cincinnati-Middletown, OH-KY-IN :23 :14
Clarksburg, WV :16 :10
Clarksville, TN-KY :16 :10
Clearlake, CA :7 :4
Cleveland-Elyria-Mentor, OH :24 :15
Clinton, IA :18 :11
Colorado Springs, CO :12 :7
Columbia, SC :17 :10
Columbia, TN :14 :8
Columbus, GA-AL :19 :11
Columbus, OH :18 :11
Concord, NH :16 :9
Cookeville, TN :14 :9
Corning, NY :11 :7
Corpus Christi, TX :18 :11
Dallas-Fort Worth-Arlington, TX :20 :12
Daphne-Fairhope-Foley, AL :15 :9
Davenport-Moline-Rock Island, IA-IL :18 :11
Dayton, OH :18 :11
Decatur, AL :15 :9
Decatur, IL :17 :10
Deltona-Daytona Beach-Ormond Beach, FL :11 :6
Denver-Aurora-Broomfield, CO :14 :9
Des Moines-West Des Moines, IA :15 :9
Detroit-Warren-Livonia, MI :21 :12
Dickinson, ND :7 :4
Dothan, AL :15 :9
Dover, DE :14 :8
Duluth, MN-WI :11 :6
Durango, CO :7 :4
Durham, NC :14 :8
Durham-Chapel Hill, NC :14 :8
Dyersburg, TN :15 :9
East Stroudsburg, PA :13 :8
Eau Claire, WI :14 :8
El Centro, CA :24 :14
El Dorado, AR :18 :11
El Paso, TX :21 :12
Elizabethtown, KY :20 :12
Elkhart-Goshen, IN :21 :12
Erie, PA :19 :11
Eugene-Springfield, OR :13 :8
Eureka-Arcata-Fortuna, CA :11 :7
Evansville, IN-KY :19 :12
Fairbanks, AK :31 :19
Fairmont, WV :17 :10
Fargo, ND-MN :13 :8
Farmington, NM :8 :5
Fayetteville, NC :15 :9
Fayetteville-Springdale-Rogers, AR-MO :16 :10
Flagstaff, AZ :9 :5
Flint, MI :13 :8
Florence, SC :15 :9
Florence-Muscle Shoals, AL :15 :9
Fort Collins-Loveland, CO :12 :7
Fort Madison-Keokuk, IA-MO :18 :11
Fort Payne, AL :15 :9
Fort Smith, AR-OK :17 :10
Fort Wayne, IN :23 :14
Fresno, CA :74 :45
Gadsden, AL :16 :10
Gainesville, FL :12 :7
Gainesville, GA :16 :9
Gettysburg, PA :18 :11
Gillette, WY :13 :8
Goldsboro, NC :21 :13
Grand Island, NE :13 :8
Grand Junction, CO :12 :7
Grand Rapids-Wyoming, MI :16 :10
Grants Pass, OR :12 :7
Greeley, CO :13 :8
Green Bay, WI :16 :10
Greensboro-High Point, NC :14 :9
Greenville, NC :13 :8
Greenville-Mauldin-Easley, SC :16 :10
Grenada, MS :16 :9
Gulfport-Biloxi, MS :16 :10
Hagerstown-Martinsburg, MD-WV :19 :11
Hammond, LA :15 :9
Hanford-Corcoran, CA :28 :17
Harriman, TN :22 :13
Harrisburg-Carlisle, PA :20 :12
Harrisonburg, VA :15 :9
Hartford-West Hartford-East Hartford, CT :14 :9
Hattiesburg, MS :18 :11
Helena, MT :16 :9
Helena-West Helena, AR :16 :9
Hickory-Lenoir-Morganton, NC :16 :10
Hilo, HI :27 :16
Hobbs, NM :13 :8
Holland-Grand Haven, MI :15 :9
Homosassa Springs, FL :11 :7
Honolulu, HI :12 :7
Hot Springs, AR :18 :11
Houma-Bayou Cane-Thibodaux, LA :13 :8
Houston-Sugar Land-Baytown, TX :21 :13
Huntington-Ashland, WV-KY-OH :19 :11
Huntsville, AL :16 :9
Indianapolis-Carmel, IN :25 :15
Iowa City, IA :16 :10
Jackson, MS :19 :11
Jackson, TN :15 :9
Jackson, WY-ID :11 :6
Jacksonville, FL :13 :8
Jamestown-Dunkirk-Fredonia, NY :13 :8
Jasper, IN :18 :11
Johnstown, PA :19 :12
Juneau, AK :11 :6
Kahului-Wailuku, HI :11 :6
Kalamazoo-Portage, MI :17 :10
Kalispell, MT :13 :8
Kansas City, MO-KS :24 :15
Kapaa, HI :11 :7
Keene, NH :16 :10
Kingsport-Bristol-Bristol, TN-VA :15 :9
Kinston, NC :13 :8
Klamath Falls, OR :18 :11
Knoxville, TN :18 :11
Kokomo, IN :16 :10
La Crosse, WI-MN :14 :8
Laconia, NH :11 :7
Lafayette, IN :24 :14
Lafayette, LA :18 :11
Lake Charles, LA :14 :8
Lake Havasu City-Kingman, AZ :6 :4
Lakeland-Winter Haven, FL :13 :8
Lancaster, PA :21 :13
Lansing-East Lansing, MI :14 :9
Laramie, WY :9 :6
Las Cruces, NM :25 :15
Las Vegas-Paradise, NV :20 :12
Laurel, MS :18 :11
Lawrenceburg, TN :14 :8
Lebanon, NH-VT :11 :7
Lebanon, PA :24 :14
Lewiston-Auburn, ME :13 :8
Lexington-Fayette, KY :16 :10
Lima, OH :17 :10
Lincoln, NE :14 :9
Little Rock-North Little Rock-Conway, AR :19 :12
Logan, UT-ID :15 :9
Los Angeles-Long Beach-Santa Ana, CA :33 :20
Louisville/Jefferson County, KY-IN :22 :13
Lumberton, NC :14 :9
Lynchburg, VA :13 :8
Macon, GA :19 :12
Madera, CA :27 :16
Madison, WI :16 :9
Manchester-Nashua, NH :14 :8
Marshall, MN :12 :7
Marshall, TX :17 :10
McAlester, OK :19 :11
McAllen-Edinburg-Mission, TX :18 :11
Medford, OR :15 :9
Memphis, TN-MS-AR :17 :10
Merced, CA :18 :11
Meridian, MS :17 :10
Miami-Fort Lauderdale-Pompano Beach, FL :14 :8
Michigan City-La Porte, IN :16 :10
Middlesborough, KY :17 :10
Milwaukee-Waukesha-West Allis, WI :18 :11
Minneapolis-St. Paul-Bloomington, MN-WI :17 :10
Missoula, MT :21 :12
Mobile, AL :15 :9
Modesto, CA :25 :15
Monroe, LA :22 :13
Monroe, MI :16 :9
Montgomery, AL :18 :11
Morgantown, WV :15 :9
Mount Vernon, IL :14 :9
Muncie, IN :16 :10
Muscatine, IA :18 :11
Muskegon-Norton Shores, MI :15 :9
Napa, CA :23 :14
Nashville-Davidson--Murfreesboro--Franklin, TN :17 :10
New Castle, IN :15 :9
New Haven-Milford, CT :15 :9
New Orleans-Metairie-Kenner, LA :21 :13
New York-Northern New Jersey-Long Island, NY-NJ-PA :23 :14
Niles-Benton Harbor, MI :14 :9
Nogales, AZ :16 :10
Norwich-New London, CT :13 :8
Ogden-Clearfield, UT :15 :9
Oklahoma City, OK :16 :10
Omaha-Council Bluffs, NE-IA :19 :12
Orlando-Kissimmee, FL :12 :7
Owensboro, KY :18 :11
Oxnard-Thousand Oaks-Ventura, CA :16 :10
Paducah, KY-IL :17 :10
Palm Bay-Melbourne-Titusville, FL :10 :6
Parkersburg-Marietta-Vienna, WV-OH :17 :10
Pascagoula, MS :15 :9
Pendleton-Hermiston, OR :12 :7
Pensacola-Ferry Pass-Brent, FL :14 :8
Peoria, IL :16 :10
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD :28 :17
Phoenix-Mesa-Scottsdale, AZ :26 :16
Pittsburgh, PA :25 :15
Pittsfield, MA :14 :9
Platteville, WI :15 :9
Pocatello, ID :15 :9
Ponca City, OK :17 :10
Portland-South Portland-Biddeford, ME :15 :9
Portland-Vancouver-Beaverton, OR-WA :12 :7
Portsmouth, OH :16 :10
Poughkeepsie-Newburgh-Middletown, NY :13 :8
Prescott, AZ :7 :4
Prineville, OR :14 :9
Providence-New Bedford-Fall River, RI-MA :18 :11
Provo-Orem, UT :14 :8
Pueblo, CO :11 :7
Quincy, IL-MO :16 :10
Raleigh-Cary, NC :16 :9
Rapid City, SD :11 :6
Reading, PA :19 :11
Red Bluff, CA :14 :8
Redding, CA :10 :6
Reno-Sparks, NV :15 :9
Richmond, VA :15 :9
Richmond-Berea, KY :15 :9
Riverside-San Bernardino-Ontario, CA :34 :21
Riverton, WY :13 :8
Roanoke, VA :15 :9
Rochester, MN :13 :8
Rochester, NY :14 :9
Rock Springs, WY :13 :8
Rockford, IL :16 :9
Rocky Mount, NC :13 :8
Rome, GA :18 :11
Russellville, AR :14 :9
Rutland, VT :15 :9
Sacramento--Arden-Arcade--Roseville, CA :15 :9
Salinas, CA :10 :6
Salisbury, NC :16 :9
Salt Lake City, UT :15 :9
San Antonio, TX :14 :9
San Diego-Carlsbad-San Marcos, CA :24 :14
San Francisco-Oakland-Fremont, CA :16 :10
San Jose-Sunnyvale-Santa Clara, CA :16 :10
San Luis Obispo-Paso Robles, CA :16 :10
Santa Barbara-Santa Maria-Goleta, CA :14 :9
Santa Cruz-Watsonville, CA :10 :6
Santa Fe, NM :8 :5
Santa Rosa-Petaluma, CA :14 :8
Sault Ste. Marie, MI :14 :8
Savannah, GA :17 :10
Scottsbluff, NE :9 :6
Scranton--Wilkes-Barre, PA :14 :8
Seaford, DE :14 :8
Seattle-Tacoma-Bellevue, WA :16 :10
Sheridan, WY :14 :8
Shreveport-Bossier City, LA :26 :16
Sierra Vista-Douglas, AZ :11 :7
Sioux City, IA-NE-SD :16 :10
Sioux Falls, SD :14 :9
Somerset, KY :16 :10
South Bend-Mishawaka, IN-MI :21 :13
Spartanburg, SC :16 :10
Spokane, WA :12 :7
Springfield, IL :16 :10
Springfield, MA :15 :9
Springfield, MO :17 :10
Springfield, OH :17 :10
St. Cloud, MN :14 :8
St. George, UT :11 :7
St. Joseph, MO-KS :20 :12
St. Louis, MO-IL :22 :13
State College, PA :19 :11
Stockton, CA :21 :12
Syracuse, NY :12 :7
Talladega-Sylacauga, AL :17 :10
Tallahassee, FL :14 :9
Tampa-St. Petersburg-Clearwater, FL :13 :8
Terre Haute, IN :19 :12
Texarkana, TX-Texarkana, AR :18 :11
Thomasville-Lexington, NC :17 :10
Toledo, OH :17 :10
Topeka, KS :14 :9
Torrington, CT :9 :6
Trenton-Ewing, NJ :15 :9
Truckee-Grass Valley, CA :10 :6
Tucson, AZ :10 :6
Tulsa, OK :16 :10
Tupelo, MS :16 :10
Tuscaloosa, AL :16 :9
Ukiah, CA :12 :7
Valdosta, GA :14 :9
Vallejo-Fairfield, CA :15 :9
Vernal, UT :12 :7
Virginia Beach-Norfolk-Newport News, VA-NC :14 :8
Visalia-Porterville, CA :25 :15
Warner Robins, GA :16 :10
Washington-Arlington-Alexandria, DC-VA-MD-WV :19 :12
Waterloo-Cedar Falls, IA :16 :10
Watertown, SD :18 :11
Weirton-Steubenville, WV-OH :20 :12
Wenatchee, WA :17 :10
Wheeling, WV-OH :20 :12
Wichita, KS :16 :9
Wilmington, NC :14 :9
Winchester, VA-WV :16 :10
Winston-Salem, NC :15 :9
Worcester, MA :15 :9
Yakima, WA :17 :10
York-Hanover, PA :20 :12
Youngstown-Warren-Boardman, OH-PA :23 :14
Yuba City, CA :12 :7
Yuma, AZ :14 :9

Yes
This will work as long as the actual minimum is less than 500.
No
If the actual minimum is greater than 500 this won't work.

Can you now write the code to get the city with the smallest PM 10 value? Change the lines that start with a comment (a #) below.

The same city has the minimum PM 2.5 and the minimum PM 10.
Check your program for PM 10.
The two cities are in different states, but are both in the east.
You didn't run the first program to find the minimum PM 2.5, did you?
The two cities are in different states, but are both in the west.
Two different cities have the minimum values, but they are both in the west.

        csp-18-5-4: csp-18-5-3: The following program prints the minimum PM 2.5 pollution found, but the code is mixed up.  Drag the blocks of statements from the left column to the right column and put them in the right order.  Then click on Check Me to see if you are right. You will be told if any of the lines are in the wrong order or have the wrong indention.# read all the lines
in_file = open("uspoll.txt","r")
lines = in_file.readlines()
in_file.close()

# initialize the variables
minCity = ''
min25 = 500
---
# loop through the lines
for line in lines:
---
    # split at :
    values = line.split(":")
---
    # get the PM 2.5 pollution
    new25 = float(values[2])
---
    # if current <  min
    if new25 < min25:
---
        # save new min info
        minCity = values[0]
        min25 = new25
---
# print the smallest PM 2.5 value
print("Smallest PM 2.5 ",min25," in ",minCity)

Next Section - What’s the average PM 2.5 pollution?