Air quality
Air quality in Linz today
Updated
Good (US AQI 27) Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. Model estimate for Mon, Oct 26, 3:00 am (02:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Linz, Upper Austria, Austria, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 27 Good
- PM2.5
- 3.5 µg/m³ 0.2× WHO 24-h guideline
- PM10
- 5.8 µg/m³
- Ozone
- 57 µg/m³
- Dominant pollutant
- PM2.5 sub-index 27
- Best hour today
- 9:00 am AQI 25
- European AQI
- 19
Air quality in Linz right now
Right now the modelled US Air Quality Index for Linz, Upper Austria, Austria is 27, which falls in the "Good" band (up to 50). Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
The index is driven mainly by PM2.5, whose own sub-index is 27. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 3.5 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 5.8 µg/m³ against a guideline of 45; ozone is 57 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 2.9 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 148 µg/m³.
NASA FIRMS shows 9 fire hotspots within 300 km in the last day (nearest about 4 km), but particle levels are not elevated enough to point to smoke right now.
Linz AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 25 around Mon 9:00 am to 42 around Tue 3:00 am, staying "Good" throughout.
The following day is expected to be worse, averaging about 51 against 29 for the next 24 hours.
| Local time (Europe/Vienna) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 3:00 am | 27 | Good | 3.5 | 6 | 57 |
| Mon 6:00 am | 27 | Good | 4.1 | 6 | 52 |
| Mon 9:00 am | 25 | Good | 4.2 | 7 | 55 |
| Mon 12:00 pm | 25 | Good | 3.9 | 7 | 65 |
| Mon 3:00 pm | 27 | Good | 5.2 | 7 | 69 |
| Mon 6:00 pm | 30 | Good | 9 | 13 | 55 |
| Mon 9:00 pm | 28 | Good | 12.1 | 21 | 43 |
| Tue 12:00 am | 34 | Good | 16 | 21 | 41 |
| Tue 3:00 am | 42 | Good | 12.2 | 17 | 35 |
| Tue 6:00 am | 48 | Good | 12.2 | 16 | 36 |
| Tue 9:00 am | 51 | Moderate | 10.7 | 14 | 36 |
| Tue 12:00 pm | 52 | Moderate | 7.9 | 12 | 60 |
| Tue 3:00 pm | 53 | Moderate | 7 | 12 | 63 |
| Tue 6:00 pm | 54 | Moderate | 12 | 22 | 42 |
| Tue 9:00 pm | 54 | Moderate | 12.3 | 19 | 43 |
| Wed 12:00 am | 54 | Moderate | 10.1 | 14 | 41 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Linz today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 9:00 am (AQI 25, Good) and the worst around 6:00 pm (AQI 30). The difference across the day is small, so timing matters little.
Linz vs the rest of Austria
Across 2 Austria cities we track, the average US AQI right now is 43 (Good). Linz at 27 is 16 points cleaner than average.
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Linz
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Vienna | 155 km | 28 | Good | 3.9 |
| Graz | 163 km | 58 | Moderate | 12.3 |
| Brno | 197 km | 43 | Good | 4.6 |
| Prague | 198 km | 28 | Good | 3 |
| Munich | 202 km | 29 | Good | 2.9 |
| Bratislava | 210 km | 40 | Good | 3.9 |
| Most | 249 km | 26 | Good | 3.1 |
| Augsburg | 250 km | 29 | Good | 3.4 |
Model vs measured
The nearest measured PM2.5 reading is 1 µg/m³ from Sensor.Community (median of 28 sensors), centred about 4 km from the city centre. That is close to the model estimate of 3.5 µg/m³. Low-cost sensors can read high in humid air; reference monitors are more accurate but sparser.
Advice for sensitive groups
With the AQI at 27, there is no need for sensitive groups to change plans. People with asthma should still carry their reliever inhaler as usual.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Linz
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), Sensor.Community, NASA FIRMS.