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Instruction Manual
11
8. Appendix
About the Air Quality Levels
AQI
Air
Pollution
Level
(ug/m3,
24-hour
average)
Health Implications
Cautionary Statement
(for PM2.5)
0 - 50
Good
0.0-12.0
Air quality is considered
satisfactory, and air
pollution poses little or
no risk
None
51 -100
Moderate
12.1-35.4
Air quality is
acceptable; however,
for some pollutants
there may be a
moderate health
concern for a very small
number of people who
are unusually sensitive
to air pollution.
Active children and
adults, and people with
respiratory disease,
such as asthma, should
limit prolonged outdoor
exertion.
101-150
Mild
35.5-55.4
Members of sensitive
groups may experience
health effects. The
general public is not
likely to be affected.
Active children and
adults, and people with
respiratory disease,
such as asthma, should
limit prolonged outdoor
exertion.
151-200
Unhealthy
55.5-150.4
Everyone may begin to
experience health
effects; members of
sensitive groups may
experience more
serious health effects
Active children and
adults, and people with
respiratory disease,
such as asthma, should
avoid prolonged outdoor
exertion; everyone else,
especially children,
should limit prolonged
outdoor exertion
201-300
Severe
150.5-250.4
Health warnings of
emergency conditions.
The entire population is
more likely to be
affected.
Active children and
adults, and people with
respiratory disease,
such as asthma, should
avoid all outdoor
exertion; everyone else,
especially children,
should limit outdoor
exertion.
300+
Hazardous
250.5+
Health alert: everyone
may experience more
serious health effects
Everyone should avoid
all outdoor exertion