Table 2b: People at Risk In 25 Most Ozone-Polluted Cities

2007 Rank1	Metropolitan Statistical Areas	Total Population2	Under 183	65 and Over3	Pediatric Asthma4,8	Adult Asthma5,8	Chronic Bronchitis6,8	Emphysema7,8
1	Los Angeles-Long Beach-Riverside, CA	17,629,607	4,921,801	1,781,348	438,040	916,542	510,446	202,486
2	Bakersfield, CA	756,825	232,363	67,288	20,680	37,686	20,780	7,858
3	Visalia-Porterville, CA	410,874	134,343	38,049	11,957	19,900	11,028	4,302
4	Fresno-Madera, CA	1,020,372	311,230	99,900	27,699	51,057	28,344	11,176
5	Houston-Baytown-Huntsville, TX	5,380,661	1,513,625	432,961	134,713	261,308	154,239	56,816
6	Merced, CA	241,706	79,143	21,318	7,044	11,676	6,437	2,448
7	Dallas-Fort Worth, TX	6,160,046	1,700,462	520,804	151,341	300,888	177,236	65,615
8	Sacramento--Arden-Arcade--Truckee, CA-NV	2,187,694	561,213	256,759	49,948	117,608	66,352	27,913
9	Baton Rouge-Pierre Part, LA	689,693	169,445	71,763	15,081	30,912	21,005	8,358
10	New York-Newark-Bridgeport, NY-NJ-CT-PA	21,903,623	5,337,060	2,790,776	474,998	1,421,500	681,921	296,377
11	Washington-Baltimore-Northern Virginia, DC-MD-VA-WV	8,125,656	2,040,180	835,307	181,576	518,499	247,738	99,659
12	Philadelphia-Camden-Vineland, PA-NJ-DE-MD	6,372,799	1,560,212	831,328	138,859	384,921	199,063	87,763
13	Hanford-Corcoran, CA	143,420	40,411	10,597	3,597	7,337	3,951	1,324
13	Modesto, CA	505,505	150,921	50,172	13,432	25,566	14,234	5,657
15	Phoenix-Mesa-Scottsdale, AZ	3,865,077	1,053,835	436,359	93,791	205,219	113,406	46,717
16	Charlotte-Gastonia-Salisbury, NC-SC	2,120,745	543,952	224,209	48,412	102,362	63,862	25,759
17	Las Vegas-Paradise-Pahrump, NV	1,751,028	456,783	191,310	40,654	90,888	52,272	21,243
17	Milwaukee-Racine-Waukesha, WI	1,708,563	428,583	210,102	38,144	116,405	52,838	22,862
19	St. Louis-St. Charles-Farmington, MO-IL	2,840,179	689,139	362,685	61,333	180,965	88,845	38,796
20	El Centro, CA	155,823	47,199	16,035	4,201	7,813	4,335	1,731
20	Kansas City-Overland Park-Kansas City, MO-KS	1,942,169	488,350	221,928	43,463	118,884	59,449	24,834
20	Beaumont-Port Arthur, TX	383,530	96,678	50,496	8,604	19,743	11,862	5,260
20	Chicago-Naperville-Michigan City, IL-IN-WI	9,661,840	2,544,703	1,051,356	226,479	503,654	289,114	118,463
24	Grand Rapids-Muskegon-Holland, MI	1,315,319	351,496	144,064	31,283	87,591	39,147	16,094
25	Atlanta-Sandy Springs-Gainesville, GA-AL	5,249,121	1,387,694	419,991	123,505	281,445	152,989	55,288
25	Cleveland-Akron-Elyria, OH	2,931,774	700,675	415,219	62,360	176,254	93,335	42,751

(1) Cities are ranked using the highest weighted average for any county within that metropolitan statistical area.
(2) Total Population represents the at-risk populations for all counties within the respective Combined Statistical Area or Metropolitan Statistical Area.
(3) Those 18 & under and 65 & over are vulnerable to PM_2.5 and are, therefore, included. They should not be used as population denominators for disease estimates.
(4) Pediatric Asthma estimates are for those under 18 years of age and represent the estimated number of people who had asthma in 2005, based on national rates (NHIS) applied
to county population estimates (U.S. Census).
(5) Adult Asthma estimates are for those 18 years and older and represent the estimated number of people who had asthma during 2005, based on state rates (BRFSS) applied to
county population estimates (U.S. Census).
(6) Chronic Bronchitis estimates are for adults 18 and over who had been diagnosed in 2005, based on national rates (NHIS) applied to county population estimates (U.S. Census).
(7) Emphysema estimates are for adults 18 and over who have been diagnosed within their lifetime, based on national rates (NHIS) applied to county population estimates
(U.S. Census).
(8) Adding across rows does not produce valid estimates, i.e. summing pediatric and adult asthma and/or emphysema and chronic bronchitis.