Utah Nonattainment/Maintenance Status for Each County by Year for All Criteria Pollutants
Data is current as of August 31, 2024
Listed by County, NAAQS, Area. The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.
* The 1997 Primary Annual PM-2.5 NAAQS (level of 15 µg/m3) is revoked in attainment and maintenance areas for that NAAQS.
For additional information see the PM-2.5 NAAQS SIP Requirements Final Rule, effective October 24, 2016.
(81 FR 58009)
Important Notes
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| Data dictionary (PDF)
| County |
NAAQS |
Area Name |
Nonattainment in Year |
Redesignation
to Maintenance |
Classification |
Whole or/
Part County |
Population
(2010) |
State/
County
FIPS Codes |
| UTAH |
| Box Elder County |
PM-2.5 (2006) |
Salt Lake City, UT |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
Serious |
Part |
49,057 |
49/003 |
| Cache County |
PM-2.5 (2006) |
Logan, UT-ID |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
|
|
|
|
| 06/18/2021 |
Moderate |
Part |
112,675 |
49/005 |
| Davis County |
1-Hour Ozone (1979)-NAAQS revoked |
Salt Lake City, UT |
| 08/18/1997 |
Moderate |
Whole |
306,479 |
49/011 |
| Davis County |
8-Hour Ozone (2015) |
Northern Wasatch Front, UT |
| / / |
Moderate |
Whole |
306,479 |
49/011 |
| Davis County |
PM-2.5 (2006) |
Salt Lake City, UT |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
Serious |
Whole |
306,479 |
49/011 |
| Duchesne County |
8-Hour Ozone (2015) |
Uinta Basin, UT |
| / / |
Marginal |
Part |
15,338 |
49/013 |
| Salt Lake County |
1-Hour Ozone (1979)-NAAQS revoked |
Salt Lake City, UT |
| 08/18/1997 |
Moderate |
Whole |
1,029,655 |
49/035 |
| Salt Lake County |
8-Hour Ozone (2015) |
Northern Wasatch Front, UT |
| / / |
Moderate |
Whole |
1,029,655 |
49/035 |
| Salt Lake County |
Carbon Monoxide (1971) |
Salt Lake City, UT |
| 03/22/1999 |
Not Classified |
Part |
186,440 |
49/035 |
| Salt Lake County |
PM-10 (1987) |
Salt Lake County, UT |
| 92 |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
00 |
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
|
|
|
|
|
| 03/27/2020 |
Moderate |
Whole |
1,029,655 |
49/035 |
| Salt Lake County |
PM-2.5 (2006) |
Salt Lake City, UT |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
Serious |
Whole |
1,029,655 |
49/035 |
| Salt Lake County |
Sulfur Dioxide (1971) |
Salt Lake County, UT |
| 92 |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
00 |
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
|
Whole |
1,029,655 |
49/035 |
| Tooele County |
8-Hour Ozone (2015) |
Northern Wasatch Front, UT |
| / / |
Moderate |
Part |
54,857 |
49/045 |
| Tooele County |
PM-2.5 (2006) |
Salt Lake City, UT |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
Serious |
Part |
54,958 |
49/045 |
| Tooele County |
Sulfur Dioxide (1971) |
Tooele County, UT |
| 92 |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
00 |
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
|
Part |
58,218 |
49/045 |
| Uintah County |
8-Hour Ozone (2015) |
Uinta Basin, UT |
| / / |
Marginal |
Part |
31,979 |
49/047 |
| Utah County |
8-Hour Ozone (2015) |
Southern Wasatch Front, UT |
| / / |
Marginal |
Part |
515,895 |
49/049 |
| Utah County |
Carbon Monoxide (1971) |
Provo, UT |
| 92 |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
00 |
01 |
02 |
03 |
04 |
05 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 01/03/2006 |
Moderate > 12.7ppm |
Part |
166,596 |
49/049 |
| Utah County |
PM-10 (1987) |
Utah County, UT |
| 92 |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
00 |
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
|
|
|
|
|
| 03/27/2020 |
Moderate |
Whole |
516,564 |
49/049 |
| Utah County |
PM-2.5 (2006) |
Provo, UT |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
Serious |
Part |
517,537 |
49/049 |
| Weber County |
8-Hour Ozone (2015) |
Northern Wasatch Front, UT |
| / / |
Moderate |
Part |
224,583 |
49/057 |
| Weber County |
Carbon Monoxide (1971) |
Ogden, UT |
| 92 |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 05/08/2001 |
Moderate <= 12.7ppm |
Part |
82,825 |
49/057 |
| Weber County |
PM-10 (1987) |
Ogden, UT |
| |
|
|
95 |
96 |
97 |
98 |
99 |
00 |
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
|
|
|
|
|
| 03/27/2020 |
Moderate |
Part |
82,825 |
49/057 |
| Weber County |
PM-2.5 (2006) |
Salt Lake City, UT |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
09 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
| / / |
Serious |
Part |
224,988 |
49/057 |
Important Notes
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