Daily Report

AQI by Site

AQI is determined using real-time data measured at each site. AQI is based on the pollutant that measured highest.

Factors such as site capabilities, seasonality, wildfire or wind events, and/or technical difficulties influence which

pollutant is used to determine AQI. The data in this report is preliminary and subject to change.

03/18

03/19

03/20

03/21

03/22

03/23

03/24

San Joaquin

Stockton-University

69 (PM25)

41 (O3-8)

40 (O3-8)

37 (O3-8)

36 (O3-8)

39 (O3-8)

40 (O3-8)

Manteca

38 (PM25)

9 (PM25)

7 (PM10)

6 (PM10)

4 (PM25)

11 (PM25)

8 (PM10)

Tracy-Airport

38 (O3-8)

42 (O3-8)

35 (O3-8)

37 (O3-8)

31 (O3-8)

40 (O3-8)

Stanislaus

Modesto-14th

49 (PM25)

44 (O3-8)

39 (O3-8)

40 (O3-8)

44 (O3-8)

41 (O3-8)

Turlock

48 (PM25)

41 (O3-8)

36 (O3-8)

40 (O3-8)

39 (O3-8)

43 (O3-8)

41 (O3-8)

Merced

Merced-M St.

41 (PM25)

13 (PM25)

6 (PM10)

10 (PM25)

11 (PM25)

21 (PM25)

9 (PM25)

Merced-Coffee

42 (PM25)

40 (O3-8)

35 (O3-8)

40 (O3-8)

39 (O3-8)

41 (O3-8)

Madera

Madera-City

42 (PM25)

38 (O3-8)

35 (O3-8)

41 (O3-8)

40 (O3-8)

37 (O3-8)

42 (O3-8)

Madera

41 (O3-8)

38 (O3-8)

35 (O3-8)

42 (O3-8)

40 (O3-8)

35 (O3-8)

42 (O3-8)

Fresno

Fresno-SSP

41 (O3-8)

38 (O3-8)

36 (O3-8)

41 (O3-8)

40 (O3-8)

36 (O3-8)

42 (O3-8)

Clovis

42 (O3-8)

37 (O3-8)

36 (O3-8)

41 (O3-8)

39 (O3-8)

35 (O3-8)

41 (O3-8)

Fresno-Garland

42 (O3-8)

44 (O3-8)

36 (O3-8)

40 (O3-8)

37 (O3-8)

35 (O3-8)

41 (O3-8)

Fresno-Foundry

55 (PM25)

18 (PM25)

11 (PM25)

6 (PM25)

22 (PM25)

15 (PM25)

Fresno-Pacific

44 (PM25)

8 (PM25)

4 (PM25)

Fresno-Drummond

41 (O3-8)

35 (O3-8)

39 (O3-8)

37 (O3-8)

34 (O3-8)

42 (O3-8)

Parlier

44 (O3-8)

38 (O3-8)

40 (O3-8)

42 (O3-8)

41 (O3-8)

35 (O3-8)

44 (O3-8)

Tranquillity

31 (O3-8)

33 (O3-8)

28 (O3-8)

38 (O3-8)

32 (O3-8)

33 (O3-8)

39 (O3-8)

Huron

26 (PM25)

10 (PM25)

4 (PM25)

6 (PM25)

5 (PM25)

12 (PM25)

10 (PM25)

Kings

Hanford

51 (PM25)

32 (O3-8)

36 (O3-8)

39 (O3-8)

37 (O3-8)

35 (O3-8)

43 (O3-8)

Corcoran

48 (PM25)

18 (PM25)

10 (PM25)

8 (PM25)

15 (PM25)

20 (PM25)

17 (PM25)

Tulare

Visalia-Ashland

49 (PM25)

35 (O3-8)

33 (O3-8)

39 (O3-8)

40 (O3-8)

34 (O3-8)

42 (O3-8)

Porterville

44 (PM25)

36 (O3-8)

32 (O3-8)

41 (O3-8)

40 (O3-8)

34 (O3-8)

42 (O3-8)

Ash Mountain-SNP

43 (O3-8)

37 (O3-8)

43 (O3-8)

41 (O3-8)

34 (O3-8)

38 (O3-8)

Lower Kaweah-SNP

45 (O3-8)

47 (O3-8)

44 (O3-8)

54 (O3-8)

46 (O3-8)

40 (O3-8)

Kern

Shafter

42 (O3-8)

40 (O3-8)

32 (O3-8)

42 (O3-8)

39 (O3-8)

30 (O3-8)

43 (O3-8)

Oildale

Bakersfield-Gold

38 (PM25)

27 (PM10)

13 (PM25)

10 (PM25)

17 (PM25)

21 (PM25)

Bakersfield-Calif

37 (O3-8)

35 (O3-8)

29 (O3-8)

35 (O3-8)

34 (O3-8)

26 (O3-8)

34 (O3-8)

Bakersfield-Muni

43 (O3-8)

41 (O3-8)

34 (O3-8)

41 (O3-8)

40 (O3-8)

31 (O3-8)

40 (O3-8)

Edison

44 (O3-8)

37 (O3-8)

41 (O3-8)

43 (O3-8)

32 (O3-8)

43 (O3-8)

Arvin-DiGiorgio

45 (O3-8)

43 (O3-8)

38 (O3-8)

42 (O3-8)

33 (O3-8)

43 (O3-8)

Maricopa

40 (O3-8)

38 (O3-8)

32 (O3-8)

44 (O3-8)

41 (O3-8)

33 (O3-8)

42 (O3-8)

Lebec

5 (PM25)

4 (PM25)

Maximum Measured

Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant

Maximum

Federal 2015 8-Hr Ozone

Federal 1997 24-hr PM2.5

O3-1hr (ppb)

Federal 2008 8-Hr Ozone

Federal 24-hr PM10

O3-8hr (ppb)

Federal 1997 8-Hr Ozone

State 1-Hr Ozone

PM 10 (µg/m³)

144

Federal 1-Hr Ozone

State 1997 8-Hr Ozone

PM 2.5 (µg/m³)

40.6

Federal 2006 24-hr PM2.5

State 24-hr PM10

¹Data affected by smoke, high winds, fireworks, and 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, March 25, 2023

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