SO2 in Birmingham, AL
Real-time Sulfur Dioxide monitoring and health recommendations
Current SO2 Levels
Overall AQI
About Sulfur Dioxide
A gas from burning fossil fuels, can affect breathing.
Measured in ppb
Health Impact
Air quality is considered satisfactory, and air pollution poses little or no risk.
What Is a Safe Level of SO2?
By the EPA Air Quality Index, sulfur dioxide is Good — safe for everyone up to 35 ppb (AQI 0–50). From 35 to 75 ppb is Moderate (AQI 51–100): acceptable for most people, though unusually sensitive individuals may notice symptoms. Above 75 ppb the air turns Unhealthy for Sensitive Groups and EPA health guidance applies.
Birmingham is currently at AQI 45 (≈32 ppb, estimated) for SO2 — within the Good range, so SO2 levels are safe for everyone right now.
Thresholds are the official EPA AQI category breakpoints for sulfur dioxide (1-hour standard). The current concentration is estimated from the measured AQI sub-index; the exact value within a band is not recoverable from the index alone.
Sources of SO2
• Fossil fuel combustion at power plants
• Industrial facilities and refineries
• Metal processing operations
• Volcanic eruptions (natural source)
Other Pollutants
Full Air Quality Report
View all pollutants and comprehensive air quality data for Birmingham.
View Full ReportFilter Combustion Gases in Birmingham
The dominant pollutant in Birmingham is a combustion gas (SO2), AQI 45. Particle (HEPA) filtration alone won't capture gases — you want a purifier with a real activated-carbon stage, which adsorbs nitrogen dioxide, sulfur dioxide and traffic/industrial fumes that seep indoors.
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Filter Combustion Gases in Birmingham
The dominant pollutant in Birmingham is a combustion gas (SO2), AQI 45. Particle (HEPA) filtration alone won't capture gases — you want a purifier with a real activated-carbon stage, which adsorbs nitrogen dioxide, sulfur dioxide and traffic/industrial fumes that seep indoors.
Compare activated-carbon purifiers (for gases):
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