PM25 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 8 10 13 14 15 18 13

Manteca 5 6 8 10 11 14 11

Tracy-Airport 5 4 6 9 8 13

Stanislaus

Modesto-14th 4 7 9 13 13 16 13

Turlock 6 7 12 12 13 18 13

Merced

Merced-Coffee 7 9 8 9 9 13 12

Madera

Madera-City 5 8 8 9 10 14 12

Madera

Fresno

Fresno-SSP

Clovis 4 7 9 10 11 12 15

Fresno-Garland 4 9 9 12 11 12 14

Fresno-Drummond

Parlier

Tranquillity 4 6 6 8 10 13 12

Huron 3 5 6 7 8 10 11

Kings

Hanford 5 10 14 13 12 13 12

Corcoran 5 9 13 12 12 11 12

Tulare

Visalia, Church 4 9 10 13 14 13 16

Porterville 9 9 15 15 16 14 17

Ash Mountain-SNP 11 12 11 12 16 19 18

Lower Kaweah-SNP

Kern

Shafter

Oildale

Bakersfield-Calif 4 8 8 11 8 10 12

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec 5 6 8 9 8 9 10

District Maximum 11
12
15
15
16
19
18

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