Pollutants
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What is a pollutant?
Pollutants are particles and gasses in the air that, in high concentration, can
be harmful to people's health.
Reported pollutants
The Air Quality API supports the most common pollutants.
Pollutants information includes:
- Dominant pollutant
- Concentration
- Sources & Effects
| Code |
Display Name |
Full Name |
Units Measured |
| co |
CO |
Carbon monoxide |
ppb |
| c6h6 |
C6H6 |
Benzene |
μg/m³ |
| ox |
OX |
Photochemical oxidants |
ppb |
| o3 |
3 |
Ozone |
ppb |
| nh3 |
NH3 |
Ammonia |
ppb |
| nmhc |
NMHC |
Non-methane hydrocarbons |
ppb |
| no |
NO |
Nitrogen monoxide |
ppb |
| nox |
NOX |
Nitrogen oxides |
ppb |
| no2 |
NO2 |
Nitrogen dioxide |
ppb |
| p25 |
P25 |
Fine particulate matter (<2.5µm) |
μg/m³ |
| pm10 |
PM10 |
Inhalable particulate matter (<10µm) |
μg/m³ |
| so2 |
SO2 |
Sulfur dioxide |
ppb |
| trs |
TRS |
Total reduced sulfur |
μg/m³ |
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Last updated 2025-08-28 UTC.
[null,null,["Last updated 2025-08-28 UTC."],[[["\u003cp\u003ePollutants are particles and gases in the air that can be harmful to people's health in high concentrations.\u003c/p\u003e\n"],["\u003cp\u003eThe Air Quality API provides information on common air pollutants, including their concentration, dominant type, sources, and effects.\u003c/p\u003e\n"],["\u003cp\u003eSupported pollutants include carbon monoxide, benzene, ozone, ammonia, and particulate matter, among others, measured in ppb or μg/m³.\u003c/p\u003e\n"]]],[],null,["# Pollutants\n\nWhat is a pollutant?\n--------------------\n\nPollutants are particles and gasses in the air that, in high concentration, can\nbe harmful to people's health.\n\nReported pollutants\n-------------------\n\nThe Air Quality API supports the most common pollutants.\n\nPollutants information includes:\n\n- Dominant pollutant\n- Concentration\n- Sources \\& Effects\n\n| Code | Display Name | Full Name | Units Measured |\n|------|--------------|---------------------------------------|----------------|\n| co | CO | Carbon monoxide | ppb |\n| c6h6 | C6H6 | Benzene | μg/m³ |\n| ox | OX | Photochemical oxidants | ppb |\n| o3 | 3 | Ozone | ppb |\n| nh3 | NH3 | Ammonia | ppb |\n| nmhc | NMHC | Non-methane hydrocarbons | ppb |\n| no | NO | Nitrogen monoxide | ppb |\n| nox | NOX | Nitrogen oxides | ppb |\n| no2 | NO2 | Nitrogen dioxide | ppb |\n| p25 | P25 | Fine particulate matter (\\\u003c2.5µm) | μg/m³ |\n| pm10 | PM10 | Inhalable particulate matter (\\\u003c10µm) | μg/m³ |\n| so2 | SO2 | Sulfur dioxide | ppb |\n| trs | TRS | Total reduced sulfur | μg/m³ |"]]
