CALIFORNIA
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Bay Area
Monterey Bay Area-
DESIGNATIONS IN US EPA REGION 9 FOR THE
1-HOUR OZONE (Os)
NATIONAL AMBIENT AIR QUALITY STANDARDS
I B Nonattainment/Extreme
~	Nonattainment/Severe-17
~	Nonattainment/Severe-15
~	Nonattainment/Not Classified/Moderate
~	Nonattainment/Marginal
~	Nonattainment/Sec. 185 A Area
~	Attainment/Maintenance
~	Unci assifi abl e/Attainment
The primary and secondary national ambient air quality standards (NAAQS) for
1-hour ozone are 0.12 parts per million (ppm). Areas violating the NAAQS are
designated "Nonattainment." Other Pacific territories under EPA Region 9 juris-
diction (not shown on map) are designated "Unclassifiable/Attainment."
Sources: Title 40 CFR Part 81, §303, 305, 312, 329, 352, 353, 354 (2012),
78 FR 58189 (September 23, 2013), ESRI (2006), TANA (2006). S-EPA
REGION 9-AIR
W-
s
0	25 50	100 Miles
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Sacramento
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AIR1300069 l.mxd (September 26. 2013)
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San Diego
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Santa Maria-
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