Ozone Eight-Hour Maximum (PPB)

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.

02/17 02/18 02/19 02/20 02/21 02/22 02/23

San Joaquin

Stockton-Hazelton 42 38 36 30 33 35 32

Manteca

Tracy-Airport 43 42 39 34 37 40 36

Stanislaus

Modesto-14th 46 42 40 35 37 37

Turlock 40 37 35 32 32 33 32

Merced

Merced-Coffee 34 37 36 35

Madera

Madera-City 52 41 40 38 42 41 39

Madera 51 40 40 36 42 40 37

Fresno

Fresno-SSP 55 43 42 38 44 43 42

Clovis 51 40 39 35 40 41 39

Fresno-Garland 35 41 40 39

Fresno-Drummond 47 39 38 33 36 37

Parlier 56 46 42 39 43 44 42

Tranquillity 49 39 40 38 41 42 38

Huron

Kings

Hanford 47 41 41 43 43 38

Corcoran

Tulare

Visalia, Church 51 49 40 36 32 39

Porterville 48 48 36 36 37 40 36

Ash Mountain-SNP 55 58 41 42 46 48 37

Lower Kaweah-SNP 46 55 42 41 43 47 45

Kern

Shafter 52 46 41 38 40 39

Oildale 57 54 44 41 43 46 42

Bakersfield-Calif 44 46 46 43

Bakersfield-Muni 54 50 41 40 41 43 39

Edison 55 54 44 43 43 47 43

Arvin-DiGiorgio 53 52 42 42 45 45 40

Maricopa 55 49 44 44 46 46 44

Lebec

District Maximum 57
58
44
44
46
48
45

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) 72
PM10 State 24-hr 26
State 1-Hr Ozone 0

O3-8hr (ppb) 65
PM2.5 Federal 2006 24-hr 16
Federal 2008 8-Hr 0

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

PM 2.5 103
State 1997 8-Hr Ozone 0
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, February 24, 2018 Page 1 of 1