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.

09/18 09/19 09/20 09/21 09/22 09/23 09/24

San Joaquin

Stockton-Hazelton 13 14 17 14 8 13

Manteca 6 9 9 13 10 5 10

Tracy-Airport 8 10 9 12 13 7 9

Stanislaus

Modesto-14th 6 11 13 20 13 6 10

Turlock 8 12 13 18 14 7 11

Merced

Merced-Coffee 11 14 16 16 15 10 12

Madera

Madera-City 7 10 15 13 13 10 10

Madera

Fresno

Fresno-SSP

Clovis 8 9 13 12 10 11

Fresno-Garland 8 9 16 15 14 11 11

Fresno-Drummond

Parlier

Tranquillity 6 6 7 8 10 6 7

Huron 7 6 10 10 9 4 7

Kings

Hanford 9 9 16 19 15 9 11

Corcoran 8 9 16 19 17 9 11

Tulare

Visalia, Church 10 11 12 13 13 11 11

Porterville 9 11 10 13 12 10 10

Ash Mountain-SNP 13 15 16 12 10 10 11

Lower Kaweah-SNP

Kern

Shafter

Oildale

Bakersfield-Calif 9 9 11 13 13 8 8

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec 8 8 7 5 5 6

District Maximum 13
15
16
20
17
11
13

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 0
Federal 1-Hr Ozone 0

O3-1hr (ppb) 121
PM10 State 24-hr 152
State 1-Hr Ozone 35

O3-8hr (ppb) 90
PM2.5 Federal 2006 24-hr 21
Federal 2008 8-Hr Ozone 66

PM 10 (µg/m³) 153
PM2.5 Federal 1997 24-hr 4
Federal 1997 8-Hr Ozone 5

PM 2.5 (µg/m³) 103
State 1997 8-Hr Ozone 100
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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Tuesday, September 25, 2018 Page 1 of 1