C AI/IFORNI A
1
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lithium Butte County), CA
Tuscan Buttes, CA
Nevada County
(Western part), CA NEVADA
-Sacramento Metro^-GA—
\C 1 T
Calaveras County, CA
San Francisco
Bay Area, CA
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a
DESIGNATIONS IN US EPA REGION 9
FOR THE 2008 8-HOUR OZONE (03)
NATIONAL AMBIENT AIR QUALITY STANDARDS
I 1 Nonattainment/Extreme
~	Nonattainment/Severe-15
~	Nonattainment/Serious
~	Nonattainment/Moderate
I I Nonattainment/Marginal
Unclassifiable/Attainment
The 2008 primary and secondary 8-hour ozone (O3) national ambient air quality standard (NAAQS)
is 0.075 parts per million (ppm) or 75 parts per billion (ppb). Areas violating the NAAQS are desig-
nated "Nonattainment", and are classified according to the area's severity of ozone pollution levels.
Other Pacific territories under EPA Region 9 jurisdiction (not shown on map) are designated
"Unclassifiable/Attainment." The Tuscan Butte s, CA nonattainment area boundary is representational
and not drawn to scale on this map.
Sources: Title 40 CFR Part 81, §303, 305, 312, 329, 352, 353, 354 (2014), ESRI (2006), TANA
(2006).	&EPA
AIR1500028_l.mxd (March 12. 2015)	region' - air
San Luis Obispo
(Eastern San Luis
100 Miles
Ventura County, CA
(Eastern Kern), CA
Los Angeles-San Bernardino Counties
(West'IViojavc Desert), CA

ARIZONA
i?
GUAM
HAWAI
_ _
Los Angeles-SoutliTCoastj
Air Basin,
San Diego ]
County, CA
Morongo Band of,Mission Indians
(Nonattainment/Serious)
RiversidefCounty
(Coachella Valley), CA
Phoenix-Mesa, AZ
Imperial
^_^County, CA
Pechanga Band of Luiseno Mission Indians
of-the"Pechanga Reservation (Nonattainment/Moderate)

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