1.5 SO2
Sulfur dioxide is derived from fossil fuel combustion and is a major
component of air pollution globally.1,3 24-hour AQG
and interim target levels were set based on pollutant-attributed
increase in asthma-related hospital admissions and emergency room visits
with low certainty evidence, all non-accidental mortality with high
certainty evidence, and respiratory mortality with moderate certainty
evidence.
- 24-hour AQG level ( µg/m3): 40
- 24-hour Interim Targets (µg/m3): 125, 50
- Health outcomes : all-cause mortality, asthma-related hospital
admissions and emergency room visits, respiratory mortality
- Causality : causal for respiratory effects, suggestive of
causality for mortality