Criteria Pollutant Nonattainment Summary Report
Data is current as of March 31, 2024
The NO2 nonattainment area became a maintenance area on September 22, 1998.
The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.
All Carbon Monoxide areas were redesignated to maintenance areas as of September 27, 2010.
Mouse over the underlined number of counties to see the area name; click to see the associated counties. | View Report Footnotes
Download National Dataset:
dbf | xls
| Data dictionary (PDF)
| |
8-Hour Ozone (2015)
|
8-Hour Ozone (2008)
|
PM-2.5 (2012)
|
PM-2.5 (2006)
|
PM-2.5 (1997)
|
PM-10 (1987)
|
SO2 (2010)
|
SO2 (1971)
|
LEAD (2008)
|
| State(s) |
General Area Name |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
2010
Pop. |
No.
Ctys |
Cat./
Class |
| AK |
Fairbanks |
|
|
|
|
|
|
|
|
|
87 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| AZ |
Douglas/Paul Spur (Cochise County) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
17 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| AZ |
Hayden/Miami |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
11 |
2 |
Mod |
5 |
2 |
NonAtt |
5 |
1 |
NonAtt |
5 |
2 |
NonAtt |
| | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
15 |
2 |
Mod |
15 |
1 |
NonAtt |
|
|
|
|
|
|
| AZ |
Nogales |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
30 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| AZ |
Phoenix-Mesa |
3,945 |
3 |
Mod |
3,850 |
2 |
Mod |
|
|
|
|
|
|
|
|
|
3,853 |
2 |
Ser |
|
|
|
|
|
|
|
|
|
| AZ |
Rillito (Pima County) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| AZ |
West Pinal |
|
|
|
|
|
|
|
|
|
52 |
1 |
Mod |
|
|
|
283 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
| AZ |
Yuma |
87 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
101 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| CA |
Amador and Calaveras Cos (Central Mountain Cos) |
46 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| | |
38 |
1 |
Mar |
46 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Chico |
220 |
1 |
Mar |
220 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Imperial County |
175 |
1 |
Mar |
175 |
1 |
Mod |
154 |
1 |
Mod |
154 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Los Angeles-South Coast Air Basin |
15,703 |
4 |
Ext |
15,719 |
4 |
Ext |
15,716 |
4 |
Ser |
15,716 |
4 |
Ser |
15,716 |
4 |
Mod |
|
|
|
|
|
|
|
|
|
9,437 |
1 |
NonAtt |
| | |
1 |
1 |
Ser |
1 |
1 |
Sev5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| | |
1 |
2 |
Mod |
3 |
2 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Mariposa and Tuolumne Cos (Southern Mountain Cos) |
55 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| | |
18 |
1 |
Mod |
18 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Mono County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| CA |
Nevada County (Western Part) |
82 |
1 |
Ser |
82 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Owens Valley |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
7 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
| CA |
Plumas County |
|
|
|
|
|
|
6 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Sacramento Metro |
2,240 |
6 |
Ser |
2,241 |
6 |
Sev5 |
|
|
|
2,206 |
5 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
San Diego |
3,077 |
1 |
Sev5 |
3,095 |
1 |
Sev5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
San Francisco-Bay Area |
6,969 |
9 |
Mar |
6,973 |
9 |
Mar |
|
|
|
6,971 |
9 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
San Joaquin Valley |
95 |
1 |
Ser |
95 |
1 |
Sev5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| | |
3,842 |
8 |
Ext |
3,842 |
8 |
Ext |
3,842 |
8 |
Ser |
3,842 |
8 |
Ser |
3,842 |
8 |
Ser |
126 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
| CA |
San Luis Obispo |
1 |
1 |
Mar |
2 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Searles Valley |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| CA |
Southeast Desert Modified AQMA |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
258 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
| | |
425 |
1 |
Sev5 |
426 |
1 |
Ext |
|
|
|
|
|
|
|
|
|
237 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| | |
867 |
2 |
Sev5 |
868 |
2 |
Sev5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Tuscan Buttes |
0 |
1 |
Mar |
0 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Ventura County |
821 |
1 |
Ser |
823 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CA |
Yuba City |
0 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CO |
Denver-Boulder-Greeley-Ft. Collins-Loveland |
3,331 |
9 |
Mod |
3,330 |
9 |
Sev5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| CT |
Greater Connecticut |
1,629 |
5 |
Mod |
1,629 |
5 |
Ser |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| DC-MD-VA |
Washington |
5,136 |
15 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| GU |
Piti-Cabras |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
6 |
1 |
NonAtt |
1 |
1 |
NonAtt |
|
|
|
| GU |
Tanguisson Power Plant |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
1 |
NonAtt |
|
|
|
| IA |
Muscatine County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
30 |
1 |
NonAtt |
|
|
|
|
|
|
| ID |
Pocatello |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
2 |
Mod |
|
|
|
|
|
|
|
|
|
| IL-IN-WI |
Chicago-Joliet-Napier |
9,075 |
11 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| IN |
Fort Wayne-Huntington-Auburn |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
21 |
1 |
NonAtt |
|
|
|
|
|
|
| KS |
Salina |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
| KY |
Henderson-Webster Counties |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
7 |
2 |
NonAtt |
|
|
|
|
|
|
| KY-IN |
Louisville |
1,061 |
5
[Split] |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| LA |
Evangeline Parish |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
|
|
|
|
|
|
| LA |
New Orleans |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
36 |
1 |
NonAtt |
|
|
|
|
|
|
| MA-NH |
Boston-Worcester-Manchester |
|
|
|
17 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| MD |
Baltimore |
2,663 |
6 |
Mod |
2,663 |
6 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
990 |
2 |
NonAtt |
|
|
|
|
|
|
| MI |
Allegan County |
47 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| MI |
Benton Harbor |
157 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| MI |
Detroit-Ann Arbor |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
254 |
1 |
NonAtt |
|
|
|
|
|
|
| | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
52 |
1 |
NonAtt |
|
|
|
|
|
|
| MI |
Muskegon |
147 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| MN |
Minneapolis-St. Paul |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
9 |
1 |
NonAtt |
| MO |
Iron, Dent, and Reynolds Counties |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
3 |
NonAtt |
| MO |
New Madrid County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
|
|
|
|
|
|
| MO-IL |
St. Louis |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
|
|
|
|
|
|
| | |
2,488 |
8 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5 |
1 |
NonAtt |
| MT |
Billings/Laurel |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
7 |
1 |
NonAtt |
|
|
|
| MT |
Lame Deer |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| MT |
Polson (Lake County) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| MT |
Ronan (Lake County) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| NV |
Las Vegas |
1,892 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| NY |
Jamestown |
|
|
|
135 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| NY |
St. Lawrence County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
12 |
1 |
NonAtt |
|
|
|
|
|
|
| NY-NJ-CT |
New York-N. New Jersey-Long Island |
20,217 |
24 |
Mod |
20,217 |
24 |
Sev5 |
|
|
|
|
|
|
|
|
|
1,586 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| OH |
Canton-Massillon |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
6 |
1 |
NonAtt |
| OH |
Cleveland-Akron-Elyria |
2,780 |
7 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| OR |
Klamath Falls |
|
|
|
|
|
|
|
|
|
47 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| PA |
Clearfield and Indiana Counties |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
93 |
2 |
NonAtt |
|
|
|
|
|
|
| PA |
Lancaster |
|
|
|
519 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| PA |
Pittsburgh-New Castle |
|
|
|
2,356 |
7 |
Mar |
1,223 |
1 |
Mod |
21 |
1 |
Mod |
21 |
1 |
Mod |
|
|
|
15 |
1 |
NonAtt |
|
|
|
18 |
1 |
NonAtt |
| | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
127 |
1 |
NonAtt |
5 |
1 |
NonAtt |
|
|
|
| PA |
Reading |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
29 |
1 |
NonAtt |
| | |
|
|
|
411 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
19 |
1 |
NonAtt |
| PA |
Warren County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
18 |
1 |
NonAtt |
|
|
|
|
|
|
| PA-NJ |
Allentown-Bethlehem-Easton |
|
|
|
712 |
3 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| PA-NJ-DE-MD |
Philadelphia-Wilmington-Atlantic City |
|
|
|
197 |
1 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| | |
7,437 |
16 |
Mod |
7,437 |
16 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| PR |
Arecibo |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
32 |
1 |
NonAtt |
| PR |
Guayama-Salinas |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
23 |
1 |
NonAtt |
|
|
|
|
|
|
| PR |
San Juan |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
275 |
5 |
NonAtt |
|
|
|
|
|
|
| TN |
Johnson City-Kingsport-Bristol |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
15 |
1 |
NonAtt |
|
|
|
|
|
|
| TX |
Dallas-Fort Worth |
6,202 |
9 |
Mod |
6,280 |
10 |
Sev5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| TX |
Fairfield |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4 |
2 |
NonAtt |
|
|
|
|
|
|
| TX |
Houston-Sugar Land-Baytown |
5,773 |
6 |
Mod |
5,892 |
8 |
Sev5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| TX |
Howard County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
|
|
|
|
|
|
| TX |
Hutchinson County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
15 |
1 |
NonAtt |
|
|
|
|
|
|
| TX |
Mount Pleasant |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
|
|
|
|
|
|
| TX |
Navarro County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
1 |
NonAtt |
|
|
|
|
|
|
| TX |
San Antonio |
1,715 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| TX |
Tatum |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2 |
2 |
NonAtt |
|
|
|
|
|
|
| TX-NM |
El Paso-Las Cruces |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| | |
813 |
2 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
649 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
| UT |
Provo |
516 |
1 |
Mar |
|
|
|
|
|
|
518 |
1 |
Ser |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| UT |
Salt Lake City |
1,616 |
4 |
Mod |
|
|
|
|
|
|
1,665 |
5 |
Ser |
|
|
|
|
|
|
|
|
|
1,030 |
1 |
NonAtt |
|
|
|
| UT |
Tooele County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
58 |
1 |
NonAtt |
|
|
|
| UT |
Uinta Basin |
47 |
2 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| VA |
Giles County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
|
|
|
|
|
|
| WA |
Whatcom County |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
1 |
NonAtt |
|
|
|
|
|
|
| WI |
Milwaukee-Racine |
1,648 |
5 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| WI |
Sheboygan |
68 |
1 |
Mod |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| WV-OH |
Parkersburg-Marietta |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4 |
2 |
NonAtt |
|
|
|
|
|
|
| WY |
Upper Green River Basin |
|
|
|
11 |
3 |
Mar |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The area population is displayed in 1000's. 'Cat.' is Category.
Area Name:
The "State(s) Area Name" column contains a common or general name for the nonattainment areas on the row, but may not reflect the exact name of any area on the row. This column cannot be exact since the nonattainment area for one pollutant may not contain the same counties, cities, or states as the nonattainment area for another pollutant on the same row. to see the area name or click on them to see the associated counties. The abbreviations listed in the "State(s)" column reflect all states identified in row. However, some states on a row may be nonattainment for some pollutants and not for others in the general area.
Split Area:
'Split' in the No. Ctys column indicates that the multi-state area has states that have been redesignated but the area does not become a maintenance area until all states in the area are redesignated. The whole area population is displayed in this report. Clicking on a "Split" No. Ctys will display information for the state(s) that have not been redesignated.
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