Air quality in St. Louis today
United States · Updated Thursday 19:00 (local time) · Model data from the Copernicus Atmosphere Monitoring Service
Fair European AQI
Fine for almost everyone.
Pollutants right now
| Pollutant | Value | Level |
|---|---|---|
| PM2.5 | 7 µg/m³ | Good |
| PM10 | 7 µg/m³ | Good |
| NO₂ | 17 µg/m³ | Good |
| O₃ | 58 µg/m³ | Fair |
The pollutant that matters most in St. Louis right now is O₃.
Forecast: next 24 hours
The air in St. Louis should stay good to fair for the next 24 hours. The cleanest hour is expected around Fri 10:00.
| Time | AQI | Level | PM2.5 |
|---|---|---|---|
| Thu 20:00 | 30 | Fair | 8 |
| Thu 23:00 | 27 | Fair | 6 |
| Fri 02:00 | 26 | Fair | 6 |
| Fri 05:00 | 28 | Fair | 5 |
| Fri 08:00 | 26 | Fair | 5 |
| Fri 11:00 | 24 | Fair | 3 |
| Fri 14:00 | 36 | Fair | 3 |
| Fri 17:00 | 30 | Fair | 3 |
The last 30 days
Over the last 30 days the average daily AQI in St. Louis was 42, with 1 day(s) rated poor or worse. The cleanest day was 23 Sept, the most polluted 18 Sept.
Questions and answers
- Is the air in St. Louis good today?
- Right now the European Air Quality Index in St. Louis is 30, which is fair. Fine for almost everyone.
- What pollutes the air in St. Louis?
- At the moment O₃ contributes most to the air quality index in St. Louis. The index takes the worst of fine particles (PM2.5), coarser particles (PM10), nitrogen dioxide, ozone and sulphur dioxide.
- When will the air in St. Louis be cleanest?
- The air in St. Louis should stay good to fair for the next 24 hours. The cleanest hour is expected around Fri 10:00.
- Where does this data come from?
- Wheezair shows model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), served by Open-Meteo: about 11 km resolution in Europe and 40 km elsewhere, updated daily. They are not station measurements, so a busy street can be worse than its city's value.