Page 86 - Fundamentals of Air Pollution

200-299 380-420 800-1599 17,0-33.9 400-800 1130-2259 Very unhealthy Significant aggravation Elderly and persons with
of symptoms and existing heart or lung
decreased exercise disease should stay
tolerance in persons indoors and reduce
with heart or lung physical activity.
disease, with
widespread
symptoms in the
healthy population.
100-199 150-380 365-799 10.0-16.9 235-400 NR Unhealthy Mild aggravation of Persons with existing heart
symptoms in or respiratory ailments
susceptible persons, should reduce physical
with irritation exertion and outdoor
symptoms in the activity.
healthy population.
fl
fl
50-99 50 -150 80 -364 5.0-9.9 120-235 NR Moderate
0-49 0-50 0-79 0-4.9 0-119 NR Good
NR = No index values reported at concentration levels below those specified by "alert level'' criteria (Table 5-1).
a
Annual primary National Ambient Air Quality Standard.
Source: 40 CFR, § 58, App. G, 1992.