Fine particles
14.8µg/m³Fair · 1 hourCAMS model • Open-Meteo
BrnoAir quality, PM2.5 and PM10
Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.
Brno - latest available concentrations (September 26, 2026, 03:00 local time): PM2.5: 14.8 µg/m³, PM10: 20.2 µg/m³, O₃: 33 µg/m³, NO₂: 13.1 µg/m³, SO₂: 1 µg/m³, CO: 284 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →Brno · Air pollutant concentrations
Data time: September 26, 2026 · 03:00 · local timeParticulate matter
20.2µg/m³Fair · 1 hourOzone
33µg/m³Good · 1 hourNitrogen dioxide
13.1µg/m³Fair · 1 hourSulphur dioxide
1µg/m³Good · 1 hourCarbon monoxide
284µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Brno
Brno - air pollution over recent days (2026-08-31 - 2026-09-25)
Concentrations of all available pollutants for this city.
PM2.5Lowest 3.34 2026-09-05Highest 12.13 2026-09-242026-08-31 - 2026-09-25
PM10Lowest 4.68 2026-09-05Highest 14.29 2026-09-242026-08-31 - 2026-09-25
O₃Lowest 46 2026-09-24Highest 66.63 2026-09-052026-08-31 - 2026-09-25
NO₂Lowest 3.23 2026-09-05Highest 11.03 2026-09-242026-08-31 - 2026-09-25
SO₂Lowest 0.5 2026-09-05Highest 1.41 2026-09-242026-08-31 - 2026-09-25
COLowest 139.17 2026-09-05Highest 256.08 2026-09-242026-08-31 - 2026-09-25
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-25 | 2026-09-24 | 2026-09-23 | 2026-09-22 | 2026-09-21 | 2026-09-20 | 2026-09-19 | 2026-09-07 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 8.07 | 12.13 | 6.52 | 4.96 | 4.69 | 8.51 | 8.66 | 6.35 | 4.93 | 3.34 | 4.49 | 7.97 | 7.35 | 4.89 | 6.78 |
| PM10 | 11.55 | 14.29 | 8.39 | 7.29 | 7.55 | 12.08 | 12.03 | 10.73 | 8.99 | 4.68 | 6.94 | 11.37 | 10.25 | 7.08 | 9.88 |
| O₃ | 53.25 | 46 | 49.92 | 56.04 | 62.21 | 55.54 | 55.46 | 64.46 | 64.58 | 66.63 | 60.17 | 60.25 | 54.38 | 56.58 | 55.83 |
| NO₂ | 7.3 | 11.03 | 7.23 | 4.81 | 4.01 | 6.6 | 7.56 | 6.07 | 3.29 | 3.23 | 5.24 | 8.73 | 10.58 | 6.56 | 9.08 |
| SO₂ | 1.03 | 1.41 | 1.33 | 0.73 | 0.65 | 0.93 | 1 | 1.1 | 0.82 | 0.5 | 0.63 | 1.05 | 1.1 | 0.6 | 0.82 |
| CO | 219.38 | 256.08 | 220.38 | 194.25 | 190.88 | 208.5 | 222.83 | 183.46 | 166.58 | 139.17 | 142.25 | 187.46 | 199.46 | 171.63 | 173.75 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Brno
Brno - air pollution history (2017-09 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 8.37 2020-05Highest 31.63 2018-032017-09 - 2020-05
PM10Lowest 13.57 2020-05Highest 38.77 2018-102017-09 - 2020-05
O₃Lowest 20.7 2017-11Highest 79.4 2018-082017-09 - 2020-05
NO₂Lowest 19.1 2020-05Highest 39.75 2019-022017-09 - 2020-05
COLowest 210 2018-07Highest 690 2018-122017-09 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 8.37 | 14.33 | 15.9 | 9.7 | 25.2 | 18.2 | 15.07 | 18.7 | 9.51 | 11.33 | 10.89 | 12.63 | 8.94 | 17.1 | 14.33 | 23.73 | 22.23 | 21.83 | 27.1 | 22.47 | 15.63 | 13.43 | 12.6 | 11.57 | 14.57 | 18.5 | 31.63 | 30.63 | 21.83 | 17.93 | 18.83 | 15.57 | 15.83 |
| PM10 | 13.57 | 22.43 | 23.3 | 15.57 | 32.53 | 23.87 | 21.07 | 26.83 | 16.13 | 17.17 | 18.03 | 20.97 | 14.17 | 26.43 | 22.37 | 33.07 | 28.77 | 28 | 37.8 | 38.77 | 27.37 | 23.07 | 19.37 | 18.2 | 23.4 | 25.8 | 38.57 | 36.3 | 26.4 | 22.67 | 24.63 | 22.47 | 23.1 |
| O₃ | 68 | 58 | 50.5 | 47.3 | 21.5 | 22 | 22.9 | 26.2 | 41.7 | 62.9 | 69.3 | 77.8 | 62.4 | 68.1 | 49.5 | 30.2 | 32 | 25.2 | 24.4 | 43.6 | 49.5 | 79.4 | 75.6 | 70.6 | 75.2 | 68.9 | 51.4 | 37.7 | 23.9 | 23.3 | 20.7 | 31.8 | 30.4 |
| NO₂ | 19.1 | 28.9 | 29.25 | 30.25 | 38.75 | 33.9 | 29.5 | 32.55 | 26.4 | 24.4 | 21.9 | 26.95 | 25.35 | 29.75 | 31.15 | 39.75 | 38 | 35.15 | 34.3 | 35.5 | 33.1 | 29.05 | 25.1 | 24.7 | 27.9 | 29.9 | 37.7 | 37.7 | 35.7 | 35.75 | 38.2 | 34 | 33.95 |
| CO | 399 | 422 | 428 | 448 | 576 | 436 | 319 | 302 | 265 | 511 | 320 | 484 | 538 | 530 | 530 | 624 | 641 | 690 | 431 | 356 | 323 | 260 | 210 | 228 | 293 | 313 | 483 | 465 | 476 | 439 | 448 | 374 | 379 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
Historical data by station 3
AIR QUALITY ARCHIVE · CZ0BBDN
CZ0BBDN
Station code: CZ0BBDN
Monthly monitoring station data.
PM2.5Lowest 10 2019-05Highest 35.5 2018-022017-09 - 2020-05
PM10Lowest 13.6 2020-05Highest 41 2018-022017-09 - 2020-05
O₃Lowest 20.7 2017-11Highest 79.4 2018-082017-09 - 2020-05
NO₂Lowest 11.1 2020-05Highest 35.4 2019-022017-09 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 10.3 | 16.7 | 16.6 | 10.5 | 28 | 19.9 | 15.1 | 18.9 | 10 | 11.8 | 12.5 | 14.1 | 10 | 17.2 | 14.6 | 25.3 | 23.2 | 22.6 | 26.8 | 22.9 | 16.5 | 15 | 14.1 | 12.8 | 16.6 | 17.5 | 34.8 | 35.5 | 26.3 | 21.7 | 22.1 | 17.6 | 17.3 |
| PM10 | 13.6 | 22.5 | 22.6 | 15 | 35.3 | 25.6 | 20.3 | 26.3 | 15.5 | 16 | 17.1 | 20.4 | 13.8 | 24 | 19.4 | 31.1 | 27 | 28.4 | 34.7 | 33.3 | 24.2 | 21 | 19.4 | 18 | 23.1 | 25.2 | 39.5 | 41 | 30.9 | 26.8 | 28.3 | 24.3 | 24.4 |
| O₃ | 68 | 58 | 50.5 | 47.3 | 21.5 | 22 | 22.9 | 26.2 | 41.7 | 62.9 | 69.3 | 77.8 | 62.4 | 68.1 | 49.5 | 30.2 | 32 | 25.2 | 24.4 | 43.6 | 49.5 | 79.4 | 75.6 | 70.6 | 75.2 | 68.9 | 51.4 | 37.7 | 23.9 | 23.3 | 20.7 | 31.8 | 30.4 |
| NO₂ | 11.1 | 25.2 | 24.8 | 21.6 | 32.8 | 27.7 | 22.2 | 25.7 | 19 | 14.9 | 12.8 | 15.9 | 15 | 24.9 | 24.2 | 35.4 | 31.2 | 28.6 | 29.8 | 27.6 | 27.3 | 20 | 19.5 | 17.9 | 18.3 | 15.7 | 26.5 | 30.5 | 26.6 | 29.2 | 30.8 | 25.3 | 24.2 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗EEA Czech Republic
AIR QUALITY ARCHIVE · Brno-Lisen
Brno-Lisen
Station code: CZ0BBNI
Monthly monitoring station data.
PM2.5Lowest 7.33 2020-05Highest 31.2 2018-022017-09 - 2020-05
PM10Lowest 11.5 2020-05Highest 35 2018-032017-09 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 7.33 | 13.1 | 14.4 | 8.51 | 19.9 | 13.6 | 11.9 | 15.1 | 8.55 | 11.2 | 11.6 | 12.1 | 8.36 | 18.3 | 13.7 | 20.7 | 18.9 | 18.1 | 25 | 19.7 | 14.3 | 13.1 | 12.8 | 11.4 | 13.9 | 23.4 | 29.9 | 31.2 | 20.7 | 16.3 | 17.6 | 14.4 | 14.8 |
| PM10 | 11.5 | 19.2 | 20.2 | 12.2 | 26.4 | 18.6 | 16.9 | 22.6 | 14.3 | 16.8 | 20.3 | 20.1 | 12.8 | 25.5 | 17.1 | 26.1 | 22.5 | 23.7 | 31.8 | 28.7 | 20.1 | 19 | 17.8 | 16.3 | 21.5 | 22.5 | 35 | 34.8 | 24 | 19.8 | 22.6 | 19.9 | 20.1 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗EEA Czech Republic
AIR QUALITY ARCHIVE · CZ0BBNV
CZ0BBNV
Station code: CZ0BBNV
Monthly monitoring station data.
PM2.5Lowest 7.49 2020-05Highest 30.2 2018-032017-09 - 2020-05
PM10Lowest 15.6 2020-05Highest 54.3 2018-102017-09 - 2020-05
NO₂Lowest 27.1 2020-05Highest 48.9 2018-032017-09 - 2020-05
COLowest 210 2018-07Highest 690 2018-122017-09 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 7.49 | 13.2 | 16.7 | 10.1 | 27.7 | 21.1 | 18.2 | 22.1 | 9.97 | 11 | 8.56 | 11.7 | 8.47 | 15.8 | 14.7 | 25.2 | 24.6 | 24.8 | 29.5 | 24.8 | 16.1 | 12.2 | 10.9 | 10.5 | 13.2 | 14.6 | 30.2 | 25.2 | 18.5 | 15.8 | 16.8 | 14.7 | 15.4 |
| PM10 | 15.6 | 25.6 | 27.1 | 19.5 | 35.9 | 27.4 | 26 | 31.6 | 18.6 | 18.7 | 16.7 | 22.4 | 15.9 | 29.8 | 30.6 | 42 | 36.8 | 31.9 | 46.9 | 54.3 | 37.8 | 29.2 | 20.9 | 20.3 | 25.6 | 29.7 | 41.2 | 33.1 | 24.3 | 21.4 | 23 | 23.2 | 24.8 |
| NO₂ | 27.1 | 32.6 | 33.7 | 38.9 | 44.7 | 40.1 | 36.8 | 39.4 | 33.8 | 33.9 | 31 | 38 | 35.7 | 34.6 | 38.1 | 44.1 | 44.8 | 41.7 | 38.8 | 43.4 | 38.9 | 38.1 | 30.7 | 31.5 | 37.5 | 44.1 | 48.9 | 44.9 | 44.8 | 42.3 | 45.6 | 42.7 | 43.7 |
| CO | 399 | 422 | 428 | 448 | 576 | 436 | 319 | 302 | 265 | 511 | 320 | 484 | 538 | 530 | 530 | 624 | 641 | 690 | 431 | 356 | 323 | 260 | 210 | 228 | 293 | 313 | 483 | 465 | 476 | 439 | 448 | 374 | 379 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗EEA Czech Republic
Environment and quality of life ratings · Brno
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Brno | Austria | Slovakia | Poland | Germany | Slovenia |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 69% | 78% | 58% | 62% | 78% | 87% |
| particulate matter PM2.5 (µg/m³) | 17 | — | — | — | — | — |
| Pleasure of spending time in the city | 77% | 84% | 73% | 48% | 80% | 88% |
| particulate matter PM10 (µg/m³) | 23 | — | — | — | — | — |
| Air Pollution | 41% | 21% | 35% | 63% | 25% | 26% |
| Garbage Disposal | 73% | 84% | 65% | 60% | 74% | 87% |
| Availability and quality of drinking water | 77% | 91% | 87% | 65% | 82% | 96% |
| Cleanliness and tidiness | 65% | 82% | 57% | 58% | 65% | 87% |
| Noise and Light pollution | 41% | 34% | 41% | 51% | 42% | 37% |
| Water Pollution | 32% | 14% | 27% | 39% | 23% | 17% |
Air quality in nearby cities
All cities →Czech Republic↗
Olomouc
PM2.515.2
PM1021.3
µg/m³
PM2.5 · ModerateNO₂ 10.9O₃ 36
September 26, 202603:00
Austria↗
Vienna
PM2.59.6
PM1013.9
µg/m³
PM2.5 · FairNO₂ 13.5O₃ 39
September 26, 202603:00
Czech Republic↗
Ostrava
PM2.513.5
PM1017.9
µg/m³
PM2.5 · FairNO₂ 10.9O₃ 22
September 26, 202603:00
Czech Republic↗
Prague
PM2.513.2
PM1015.1
µg/m³
PM2.5 · FairNO₂ 11.4O₃ 23
September 26, 202603:00
Czech Republic↗
Plzeň
PM2.511.4
PM1013.2
µg/m³
PM2.5 · FairNO₂ 7.2O₃ 30
September 26, 202603:00
Czech Republic · air quality in other cities
WEATHER & SURROUNDINGS
Brno · weather forecast
Daily maximum and minimum temperatures. Forecast point: 49.1951, 16.6068.
Scroll the forecast to see the following days.
Brno · September 23, 2026: minimum temperature 9.8°C, maximum 18.7°C. Wind: 13.8 km/h. Humidity: 47%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-23 | 18.7 | 9.8 | 18.7 | 9.8 | 0.2 | 3.8 | 47 | 51 |
| 2026-09-24 | 16.4 | 7.6 | 17.1 | 11.4 | 4.3 | 4.5 | 71 | 98 |
| 2026-09-25 | 13.9 | 9.2 | 17.7 | 9.3 | 0.7 | 3.8 | 53 | 72 |
| 2026-09-26 | 15.1 | 8.7 | 20.1 | 12 | 0.4 | 2.3 | 60 | 34 |
| 2026-09-27 | 18 | 8.9 | 19.8 | 12.3 | 8.7 | 2.9 | 57 | 97 |
| 2026-09-28 | 18 | 10.4 | 20.8 | 13.3 | — | 3.5 | 56 | 100 |
| 2026-09-29 | 18.4 | 10.5 | 21.2 | 13.2 | 0.8 | 3.5 | 54 | 3 |
| 2026-09-30 | 18.6 | 10.5 | 21.4 | 12.8 | 1.8 | 4.3 | 52 | 6 |
| 2026-10-01 | 19.1 | 11.1 | 21.6 | 12.5 | 0.6 | 5.9 | 39 | 74 |
| 2026-10-02 | 18.5 | 10.2 | 21.8 | 12.5 | 0.5 | 3.7 | 37 | 29 |
| 2026-10-03 | 17.3 | 9.8 | 20.8 | 12.1 | 0.2 | 4.1 | 41 | 8 |
| 2026-10-04 | 15.5 | 10.4 | 16.2 | 10.8 | 0.2 | 2.5 | 50 | 100 |
| 2026-10-05 | 16.8 | 9.2 | 19.6 | 9.4 | — | 3.5 | 55 | 3 |
| 2026-10-06 | 16 | 7.8 | 18.7 | 10.1 | 3.2 | 3.7 | 50 | 100 |
| 2026-10-07 | 17.3 | 8.2 | 20.2 | 11 | 0.2 | 2.9 | 39 | 75 |
| 2026-10-08 | 18.3 | 9.3 | 21.5 | 12.7 | — | 2.8 | 46 | 100 |
| 2026-10-09 | 17.4 | 11.4 | 17.4 | 11.5 | — | 2.6 | 47 | 100 |
| 2026-10-10 | 17.9 | 10.4 | 21.9 | 21.9 | — | 3.8 | 56 | 32 |
UV index by day · Brno
City data.
Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Brno · September 25, 2026: UV index: 4 .
| Indicator | 2026-09-25 | 2026-09-26 | 2026-09-27 | 2026-09-28 | 2026-09-29 | 2026-09-30 | 2026-10-01 | 2026-10-02 | 2026-10-03 | 2026-10-04 | 2026-10-05 | 2026-10-06 | 2026-10-07 | 2026-10-08 | 2026-10-09 | 2026-10-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 4 | 4.2 | 3.5 | 4.1 | 4.1 | 3.8 | 3.7 | 3.6 | 3.2 | 3.5 | 3.2 | 2.5 | 2.9 | 3 | 3.3 | — |
Airborne pollen · Czech Republic
grains/m³ Data for a country reference point. Local conditions may differ.
Czech Republic · September 25, 2026: Alder: 0 grains/m³. Birch: 0 grains/m³. Grass: 0.3 grains/m³. Mugwort: 1.3 grains/m³. Olive: 0 grains/m³. Ragweed: 0 grains/m³.
| Indicator | 2026-09-25 | 2026-09-26 | 2026-09-27 | 2026-09-28 |
|---|---|---|---|---|
| Alder | 0 | 0 | 0 | 0 |
| Birch | 0 | 0 | 0 | 0 |
| Grass | 0.3 | 0.6 | 0.5 | 0.2 |
| Mugwort | 1.3 | 2.1 | 1.7 | 1.1 |
| Olive | 0 | 0 | 0 | 0 |
| Ragweed | 0 | 0 | 0 | 0 |
AIR QUALITY QUESTIONS
Brno · air pollution - questions and answers
What do the latest air quality data show for Brno?
Brno - latest available concentrations (September 26, 2026, 03:00 local time): PM2.5: 14.8 µg/m³, PM10: 20.2 µg/m³, O₃: 33 µg/m³, NO₂: 13.1 µg/m³, SO₂: 1 µg/m³, CO: 284 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Brno over the past week?
The highest available daily mean PM2.5 was 12.1 µg/m³ (September 24, 2026). This comparison covers 7 days with data in the seven days before September 26, 2026. The day of the latest reading is excluded because it may be incomplete.
What period does the pollution history for Brno cover?
Available monthly means cover 2017-09 - 2020-05. The tables include PM2.5, PM10, O₃, NO₂, CO. Missing values are marked with a dash, not treated as zero. Monthly archives and current model data may come from different sources.
Is the PM2.5 concentration for Brno an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for Brno?
For September 25, 2026, the forecast UV index is 4. The UV section also shows the following available days.
What wind speed is forecast for Brno?
For September 23, 2026, forecast wind speed is 13.8 km/h. The weather table includes wind, temperature and other available parameters for subsequent days.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.