PM10 24 Hour Average (µg/m3)

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

time PM10/PM2.5 monitoring equipment is used for air quality forecasting and trend analysis.

04/19 04/20 04/21 04/22 04/23 04/24 04/25

San Joaquin

Stockton-Hazelton

Manteca 15 19 21 22 36 39 34

Tracy-Airport 12 12 22 22 27 33

Stanislaus

Modesto-14th 13 18 19 22 30 36 30

Turlock

Merced

Merced-Coffee

Madera

Madera-City 18 20 19 20 25 39 39

Madera

Fresno

Fresno-SSP

Clovis 11 24 20 20 33 42 49

Fresno-Garland 13 22 21 24 26 36 40

Fresno-Drummond

Parlier

Tranquillity

Huron

Kings

Hanford 21 34 37 34 39 52 47

Corcoran 23 31 41 36 40 50 53

Tulare

Visalia, Church 20 27 28 30 35 44 50

Porterville

Ash Mountain-SNP

Lower Kaweah-SNP

Kern

Shafter

Oildale 26 28 38 33 33 48 47

Bakersfield-Calif

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec

District Maximum 26
34
41
36
40
52
53

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximu

PM10 Federal 24-hr 2
Federal 1-Hr 0

O3-1hr (ppb) 89
PM10 State 24-hr 31
State 1-Hr Ozone 0

O3-8hr (ppb) 77
PM2.5 Federal 2006 24-hr 16
Federal 2008 8-Hr 1

PM 10 178
PM2.5 Federal 1997 24-hr 4
Federal 1997 8-Hr 0

PM 2.5 103
State 1997 8-Hr Ozone 3
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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Thursday, April 26, 2018 Page 1 of 1