Daily Report

PM2.5 24 Hour Average (µg/m³)

The information in this report is based on preliminary data and is subject to change.

08/15

08/16

08/17

08/18

08/19

08/20

08/21

San Joaquin

Stockton-University

4.3

4.6

5.1

6.4

8.6

4.1

3.3

Manteca

4.8

5.6

7.4

7.3

11.3

6.6

4.7

Tracy-Airport

3.8

4.3

5.6

6.2

9.5

3.5

2.2

Stanislaus

Modesto-14th

3.5

3.6

4.5

5.6

9.1

5.3

2.9

Turlock

6.9

7.8

9.8

9.7

10.9

8.3

6.6

Merced

Merced-M St.

7.1

7.5

9.2

10.2

10.4

6.6

Merced-Vierra

7.3

8.5

9.9

11.6

10.2

10.8

7.8

Madera

Madera-City

8.2

9.3

10.0

10.5

11.2

11.1

8.1

Madera

Fresno

Fresno-SSP

Clovis

7.7

8.2

10.4

8.8

12.9

14.0

8.9

Fresno-Garland

8.2

10.1

11.5

11.6

19.6

21.0

15.8

Fresno-Foundry

6.0

7.7

9.2

10.2

12.1

15.7

12.6

Fresno-Pacific

7.7

9.8

12.4

8.5

11.0

12.3

7.7

Fresno-Drummond

Parlier

Tranquillity

3.5

4.8

7.7

11.0

10.7

8.7

6.4

Huron

4.9

6.5

8.9

9.8

7.9

9.0

6.0

Kings

Hanford

8.6

13.8

12.4

15.3

13.9x

16.2

11.8

Corcoran

9.5

10.7

13.0

12.2

11.7x

13.6

12.7

Tulare

Visalia-Ashland

8.9

11.5

12.8

11.7

13.8x

16.5

12.7

Porterville

6.5

7.9

8.5

9.8

10.5x

10.9

10.5

Ash Mountain-SNP

7.5

6.9

7.6

8.6

9.3x

9.7

10.8

Kern

Shafter

Oildale

Bakersfield-Gold

13.1

9.7

11.8

11.6

13.0x

12.6

9.8

Bakersfield-Calif

8.1

11.4

10.1

11.0

14.5x

15.3

11.5

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec

5.1

5.7

6.7

6.9

6.6

7.4

8.5

District Maximum

13.1

13.8

13.0

15.3

19.6

21.0

15.8

Maximum Measured

Value for This Year

Pollutant	Maximum
O3-1hr (ppb)	101
O3-8hr (ppb)	84
PM 10 (µg/m³)	116
PM 2.5 (µg/m³)	49.5

Unofficial Days Over the Federal and State Standards¹

Federal 2015 8-Hr Ozone	39	Federal 1997 24-Hr PM2.5	0
Federal 2008 8-Hr Ozone	19	Federal 24-Hr PM10	0
Federal 1997 8-Hr Ozone	0	State 1-Hr Ozone	8
Federal 1-Hr Ozone	0	State 1997 8-Hr Ozone	0
Federal 2006 24-Hr PM2.5	14	State 24-Hr PM10	82

¹Data affected by smoke, high winds, fireworks, etc. and which exceeded a federal standard are denoted with

an ‘x’ in the table above. Values marked with an ‘x’ are not included in the tallies above.

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Saturday, August 22, 2026

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