Fine particles
14.5µg/m³Fair · 1 hourCAMS model • Open-Meteo
OstravaAir 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.
Ostrava - latest available concentrations (October 23, 2026, 03:00 local time): PM2.5: 14.5 µg/m³, PM10: 16.4 µg/m³, O₃: 38 µg/m³, NO₂: 11.4 µg/m³, SO₂: 1.5 µg/m³, CO: 285 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →Ostrava · Air pollutant concentrations
Data time: October 23, 2026 · 03:00 · local timeParticulate matter
16.4µg/m³Fair · 1 hourOzone
38µg/m³Good · 1 hourNitrogen dioxide
11.4µg/m³Fair · 1 hourSulphur dioxide
1.5µg/m³Good · 1 hourCarbon monoxide
285µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Ostrava
Ostrava - air pollution over recent days (2026-08-31 - 2026-10-22)
Concentrations of all available pollutants for this city.
PM2.5Lowest 4.53 2026-09-05Highest 43.15 2026-10-182026-08-31 - 2026-10-22
PM10Lowest 6 2026-09-05Highest 49.63 2026-10-182026-08-31 - 2026-10-22
O₃Lowest 24.79 2026-10-19Highest 63.13 2026-09-012026-08-31 - 2026-10-22
NO₂Lowest 3.66 2026-09-06Highest 28 2026-10-162026-08-31 - 2026-10-22
SO₂Lowest 0.85 2026-09-01Highest 9.81 2026-10-162026-08-31 - 2026-10-22
COLowest 147.08 2026-09-04Highest 707.17 2026-10-162026-08-31 - 2026-10-22
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-10-22 | 2026-10-21 | 2026-10-20 | 2026-10-19 | 2026-10-18 | 2026-10-17 | 2026-10-16 | 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 | 14.38 | 22.3 | 25.65 | 24.27 | 43.15 | 28.48 | 41.26 | 10.42 | 5.11 | 4.53 | 5.24 | 10.88 | 8.07 | 4.9 | 7.48 |
| PM10 | 16.6 | 27.61 | 30.48 | 29.18 | 49.63 | 35.6 | 49.39 | 15.18 | 9.18 | 6 | 7.55 | 14.7 | 11.69 | 7.28 | 10.81 |
| O₃ | 42.08 | 48.29 | 28.42 | 24.79 | 35.46 | 45.33 | 33.96 | 56.13 | 60.25 | 61.88 | 61 | 61.13 | 59.33 | 63.13 | 62.13 |
| NO₂ | 13.35 | 16.45 | 17.79 | 20.47 | 17.48 | 14.32 | 28 | 13.03 | 3.66 | 4.27 | 5.49 | 10.73 | 8.84 | 5.12 | 8.01 |
| SO₂ | 2.68 | 8.79 | 4.7 | 5.5 | 6.07 | 3.63 | 9.81 | 3.8 | 0.93 | 0.89 | 0.92 | 1.98 | 1.78 | 0.85 | 1.23 |
| CO | 274.08 | 353 | 361.83 | 285.92 | 415.79 | 393.08 | 707.17 | 288.58 | 172.83 | 150.54 | 147.08 | 218.29 | 205.42 | 170.38 | 175.75 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Ostrava
Ostrava - air pollution history (2017-09 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 11.9 2019-07Highest 68.9 2018-022017-09 - 2020-05
PM10Lowest 15 2020-02Highest 75.33 2018-022017-09 - 2020-05
O₃Lowest 23.5 2018-11Highest 80.4 2019-062017-09 - 2020-05
NO₂Lowest 18.6 2020-05Highest 36.87 2018-022017-09 - 2020-05
SO₂Lowest 3 2019-08Highest 25.25 2018-022017-09 - 2020-05
COLowest 157 2017-10Highest 829 2018-112017-09 - 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 | 12.05 | 20.85 | 24.1 | 12.2 | 27.2 | 20.5 | 28.8 | 23.8 | 12.3 | 13.2 | 11.9 | 15.7 | 13.1 | 27.7 | 21.1 | 34.85 | 43.15 | 23.9 | 50.65 | 34 | 20.1 | 16.65 | 16.95 | 15.9 | 18.15 | 19.9 | 53.9 | 68.9 | 35.5 | 27.7 | 30.5 | 21.6 | 22.9 |
| PM10 | 16.4 | 30.17 | 30.37 | 15 | 30.63 | 24.2 | 34.07 | 31.67 | 19.5 | 21.8 | 22.63 | 25.13 | 18.2 | 36.7 | 25.83 | 40.27 | 45.83 | 26.13 | 60.53 | 45.97 | 29.13 | 26.2 | 26.13 | 23.65 | 28.33 | 31.93 | 62.13 | 75.33 | 37.4 | 29.7 | 34.35 | 27.75 | 30.6 |
| O₃ | 66.1 | 69.7 | 59.7 | 56.5 | 37.1 | 36.5 | 28.2 | 38.2 | 43.4 | 65.3 | 68.5 | 80.4 | 61.4 | 68.9 | 59.9 | 43.8 | 39.1 | 35.8 | 23.5 | 38.9 | 53 | 72.9 | 74.4 | 68.6 | 72.8 | 68.5 | 55.1 | 35.8 | 33.4 | 31.4 | 27.4 | 36.1 | 32.5 |
| NO₂ | 18.6 | 22.77 | 24.07 | 19.07 | 24.07 | 22.8 | 27.13 | 25.77 | 21.6 | 19.43 | 20.37 | 22.23 | 22.57 | 25.43 | 25.23 | 33.2 | 30.73 | 25.07 | 35.7 | 32.8 | 28.6 | 23.73 | 20.87 | 22.47 | 24.53 | 29.13 | 36.63 | 36.87 | 25.7 | 24.25 | 27 | 22.05 | 21.95 |
| SO₂ | 5.13 | 6.44 | 7.26 | 5.34 | 4.62 | 4.8 | 5.85 | 3.56 | 3.1 | 3 | 4.44 | 4.88 | 5.07 | 6.99 | 5.15 | 6.84 | 10.14 | 4.18 | 14.95 | 12.6 | 15.35 | 16.05 | 8.33 | 8.3 | 12.55 | 10.85 | 19.45 | 25.25 | 22.5 | 6.8 | 5.63 | 4.76 | 4.13 |
| CO | 468 | 508 | 539 | 446 | 546 | 525 | 680 | 567 | 436 | 397 | 350 | 452 | 552 | 608 | 559 | 625 | 688 | 570 | 829 | 683 | 552 | 536 | 551 | 573 | 596 | 541 | 718 | 685 | — | 335 | 255 | 157 | 279 |
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 · CZ0TOCB
CZ0TOCB
Station code: CZ0TOCB
Monthly monitoring station data.
PM2.5Lowest 11.1 2019-07Highest 71.1 2018-022018-02 - 2020-05
PM10Lowest 15.3 2020-02Highest 81.5 2018-022018-02 - 2020-05
NO₂Lowest 24.1 2019-08Highest 47.1 2018-032018-02 - 2020-05
COLowest 350 2019-07Highest 829 2018-112018-02 - 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 11.1 | 18.8 | 22.8 | 11.4 | 26.8 | 20.9 | 29.7 | 24.2 | 11.7 | 12.9 | 11.1 | 14.5 | 13.6 | 28.2 | 21.9 | 37 | 46 | 24.2 | 50.3 | 33.5 | 18.7 | 15.2 | 17.3 | — | 14.7 | 17.9 | 53.3 | 71.1 |
| PM10 | 16.6 | 30.4 | 30.5 | 15.3 | 31 | 25.6 | 35.8 | 32.1 | 18.7 | 23.2 | 25 | 26.5 | 19.9 | 40.8 | 28.8 | 46.5 | 52.1 | 28.1 | 62.4 | 47.1 | 29.3 | 25.9 | 29.5 | — | 25.5 | 32.4 | 66.3 | 81.5 |
| NO₂ | 25.2 | 29.7 | 31.1 | 26.2 | 29.6 | 29.1 | 32.9 | 31.8 | 26.7 | 24.1 | 24.6 | 31.1 | 31.8 | 34 | 32.8 | 40.1 | 36.6 | 31.5 | 43.5 | 41.5 | 36.7 | 31.8 | 31.3 | 34.4 | 35.2 | 38.4 | 47.1 | 42.9 |
| CO | 468 | 508 | 539 | 446 | 546 | 525 | 680 | 567 | 436 | 397 | 350 | 452 | 552 | 608 | 559 | 625 | 688 | 570 | 829 | 683 | 552 | 536 | 551 | 573 | 596 | 541 | 718 | 685 |
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 · CZ0TOFF
CZ0TOFF
Station code: CZ0TOFF
Monthly monitoring station data.
PM10Lowest 13.6 2020-02Highest 69.3 2018-022017-09 - 2020-05
O₃Lowest 23.5 2018-11Highest 80.4 2019-062017-09 - 2020-05
NO₂Lowest 13.1 2020-02Highest 33.3 2018-022017-09 - 2020-05
SO₂Lowest 2.43 2019-08Highest 24.4 2018-022017-09 - 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM10 | 15.6 | 28.6 | 28.3 | 13.6 | 28.9 | 21.6 | 30.4 | 29.9 | 20.1 | 21.4 | 22 | 23.7 | 16.5 | 32.5 | 22.7 | 34.5 | 39.8 | 22.9 | 55.7 | 43.3 | 27.6 | 25.8 | 24.1 | 23.3 | 27.1 | 28.5 | 56.3 | 69.3 | 33.7 | 27.2 | 31.6 | 24.8 | 29.3 |
| O₃ | 66.1 | 69.7 | 59.7 | 56.5 | 37.1 | 36.5 | 28.2 | 38.2 | 43.4 | 65.3 | 68.5 | 80.4 | 61.4 | 68.9 | 59.9 | 43.8 | 39.1 | 35.8 | 23.5 | 38.9 | 53 | 72.9 | 74.4 | 68.6 | 72.8 | 68.5 | 55.1 | 35.8 | 33.4 | 31.4 | 27.4 | 36.1 | 32.5 |
| NO₂ | 14.5 | 17.1 | 18.2 | 13.1 | 17.7 | 17.1 | 22.7 | 20.9 | 16.6 | 16.4 | 17.9 | 16.6 | 17.1 | 20.9 | 19.3 | 26.4 | 25.1 | 19.4 | 31.5 | 28.1 | 22.6 | 18.4 | 14.9 | 16.3 | 18.7 | 22.1 | 28.3 | 33.3 | 22.2 | 21.3 | 24.3 | 18.9 | 21.4 |
| SO₂ | 4.91 | 6.19 | 6.8 | 5.34 | 4.17 | 4.51 | 5.27 | 3.26 | 2.87 | 2.43 | 3.43 | 3.32 | 4.19 | 6.88 | 4.56 | 6.75 | 9.99 | 4.31 | 16.9 | 12.8 | 11.5 | 17.1 | 7.85 | 7.92 | 10.1 | 6.5 | 17.2 | 24.4 | 19.1 | 3.9 | 4.78 | 5.13 | 4.59 |
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 · Ostrava-Privoz
Ostrava-Privoz
Station code: CZ0TOPR
Monthly monitoring station data.
PM2.5Lowest 12.6 2019-05Highest 66.7 2018-022017-09 - 2020-05
PM10Lowest 16.1 2020-02Highest 75.2 2018-022017-09 - 2020-05
NO₂Lowest 16.1 2020-05Highest 34.5 2018-032017-09 - 2020-05
SO₂Lowest 3.33 2019-09Highest 26.1 2018-022017-09 - 2020-05
COLowest 157 2017-10Highest 335 2017-122017-09 - 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 | 13 | 22.9 | 25.4 | 13 | 27.6 | 20.1 | 27.9 | 23.4 | 12.9 | 13.5 | 12.7 | 16.9 | 12.6 | 27.2 | 20.3 | 32.7 | 40.3 | 23.6 | 51 | 34.5 | 21.5 | 18.1 | 16.6 | 15.9 | 21.6 | 21.9 | 54.5 | 66.7 | 35.5 | 27.7 | 30.5 | 21.6 | 22.9 |
| PM10 | 17 | 31.5 | 32.3 | 16.1 | 32 | 25.4 | 36 | 33 | 19.7 | 20.8 | 20.9 | 25.2 | 18.2 | 36.8 | 26 | 39.8 | 45.6 | 27.4 | 63.5 | 47.5 | 30.5 | 26.9 | 24.8 | 24 | 32.4 | 34.9 | 63.8 | 75.2 | 41.1 | 32.2 | 37.1 | 30.7 | 31.9 |
| NO₂ | 16.1 | 21.5 | 22.9 | 17.9 | 24.9 | 22.2 | 25.8 | 24.6 | 21.5 | 17.8 | 18.6 | 19 | 18.8 | 21.4 | 23.6 | 33.1 | 30.5 | 24.3 | 32.1 | 28.8 | 26.5 | 21 | 16.4 | 16.7 | 19.7 | 26.9 | 34.5 | 34.4 | 29.2 | 27.2 | 29.7 | 25.2 | 22.5 |
| SO₂ | 5.36 | 6.68 | 7.72 | 5.34 | 5.07 | 5.09 | 6.43 | 3.87 | 3.33 | 3.56 | 5.44 | 6.44 | 5.94 | 7.1 | 5.75 | 6.93 | 10.3 | 4.06 | 13 | 12.4 | 19.2 | 15 | 8.81 | 8.68 | 15 | 15.2 | 21.7 | 26.1 | 25.9 | 9.7 | 6.48 | 4.39 | 3.67 |
| CO | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 335 | 255 | 157 | 279 |
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 · Ostrava
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Ostrava | Austria | Slovakia | Poland | Germany | Slovenia |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 75% | 78% | 58% | 62% | 78% | 87% |
| particulate matter PM2.5 (µg/m³) | 26 | — | — | — | — | — |
| Pleasure of spending time in the city | 48% | 84% | 73% | 48% | 80% | 88% |
| particulate matter PM10 (µg/m³) | 33 | — | — | — | — | — |
| Air Pollution | 68% | 21% | 35% | 63% | 25% | 26% |
| Garbage Disposal | 79% | 84% | 65% | 60% | 74% | 87% |
| Availability and quality of drinking water | 89% | 91% | 87% | 65% | 82% | 96% |
| Cleanliness and tidiness | 54% | 82% | 57% | 58% | 65% | 87% |
| Noise and Light pollution | 48% | 34% | 41% | 51% | 42% | 37% |
| Water Pollution | 23% | 14% | 27% | 39% | 23% | 17% |
Air quality in nearby cities
All cities →Poland↗
Gliwice
PM2.517.3
PM1020.8
µg/m³
PM2.5 · ModerateNO₂ 10.2O₃ 33
October 23, 202603:00
Poland↗
Katowice
PM2.524.9
PM1030.5
µg/m³
PM2.5 · ModerateNO₂ 18.6O₃ 30
October 23, 202603:00
Czech Republic↗
Olomouc
PM2.513.5
PM1016
µg/m³
PM2.5 · FairNO₂ 9.6O₃ 27
October 23, 202603:00
Czech Republic↗
Brno
PM2.512
PM1014.6
µg/m³
PM2.5 · FairNO₂ 10O₃ 24
October 23, 202603:00
Czech Republic↗
Prague
PM2.56.6
PM108.9
µg/m³
PM2.5 · FairNO₂ 6.3O₃ 48
October 23, 202603:00
Czech Republic↗
Plzeň
PM2.57
PM108.9
µg/m³
PM2.5 · FairNO₂ 5.6O₃ 43
October 23, 202603:00
Czech Republic · air quality in other cities
WEATHER & SURROUNDINGS
Ostrava · weather forecast
Daily maximum and minimum temperatures. Forecast point: 49.8347, 18.282.
Scroll the forecast to see the following days.
Ostrava · October 20, 2026: minimum temperature 5.8°C, maximum 13.4°C. Wind: 12.8 km/h. Humidity: 74%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-10-20 | 12 | 5.8 | 13.4 | 11.1 | 15.5 | 3.6 | 74 | 34 |
| 2026-10-21 | 15.8 | 7.8 | 18.2 | 12.4 | 0.1 | 3.8 | 51 | 60 |
| 2026-10-22 | 9.7 | 5.9 | 12.7 | 6.2 | 23.7 | 6.1 | 93 | 100 |
| 2026-10-23 | 13.4 | 4.9 | 14.1 | 10.4 | 17.1 | 4.7 | 59 | 21 |
| 2026-10-24 | 10.3 | 5.9 | 11.4 | 5.9 | 0.1 | 5.3 | 76 | 99 |
| 2026-10-25 | 10.2 | 3.7 | 12.4 | 8.4 | 3.2 | 6.4 | 62 | 99 |
| 2026-10-26 | 9.5 | 5.6 | 12 | 6.3 | 0.1 | 4.7 | 79 | 55 |
| 2026-10-27 | 10.3 | 6.1 | 13.9 | 9.4 | 4.1 | 4.6 | 77 | 95 |
| 2026-10-28 | 11.9 | 6 | 14.1 | 10.3 | 0.1 | 6.3 | 50 | 33 |
| 2026-10-29 | 9.6 | 7.6 | 12.6 | 8 | 0.1 | 3.3 | 70 | 98 |
| 2026-10-30 | 10.2 | 7.9 | 12.6 | 7.9 | 1.4 | 1.8 | 72 | 100 |
| 2026-10-31 | 11 | 6.3 | 13.6 | 10.2 | 0.2 | 2.4 | 65 | 92 |
| 2026-11-01 | 11 | 7.5 | 13.6 | 8.9 | 0.2 | 1.8 | 79 | 49 |
| 2026-11-02 | 12.7 | 6.5 | 16 | 7.6 | 16.7 | 4.4 | 57 | 32 |
| 2026-11-03 | 10.8 | 5.8 | 14.8 | 6.7 | 6.2 | 2.3 | 54 | 100 |
| 2026-11-04 | 11.4 | 5 | 15.5 | 6 | 0.6 | 4.5 | 41 | 53 |
| 2026-11-05 | 10.5 | 4.6 | 14.9 | 7 | — | 3.3 | 47 | 23 |
| 2026-11-06 | 9.3 | 5.5 | 13.3 | 8.1 | — | 1.1 | 60 | 92 |
UV index by day · Ostrava
City data.
You can safely stay in the sun. Sunscreen only matters on very long exposure.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Ostrava · October 22, 2026: UV index: 0.8 .
| Indicator | 2026-10-22 | 2026-10-23 | 2026-10-24 | 2026-10-25 | 2026-10-26 | 2026-10-27 | 2026-10-28 | 2026-10-29 | 2026-10-30 | 2026-10-31 | 2026-11-01 | 2026-11-02 | 2026-11-03 | 2026-11-04 | 2026-11-05 | 2026-11-06 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 0.8 | 2.7 | 2.3 | 2.6 | 2.5 | 1.2 | 2.3 | 2 | 1.1 | 2 | 2.1 | 1.9 | 1.7 | 2 | 1.1 | — |
AIR QUALITY QUESTIONS
Ostrava · air pollution - questions and answers
What do the latest air quality data show for Ostrava?
Ostrava - latest available concentrations (October 23, 2026, 03:00 local time): PM2.5: 14.5 µg/m³, PM10: 16.4 µg/m³, O₃: 38 µg/m³, NO₂: 11.4 µg/m³, SO₂: 1.5 µg/m³, CO: 285 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Ostrava over the past week?
The highest available daily mean PM2.5 was 43.2 µg/m³ (October 18, 2026). This comparison covers 7 days with data in the seven days before October 23, 2026. The day of the latest reading is excluded because it may be incomplete.
What period does the pollution history for Ostrava cover?
Available monthly means cover 2017-09 - 2020-05. The tables include PM2.5, PM10, O₃, NO₂, SO₂, 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 Ostrava 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 Ostrava?
For October 22, 2026, the forecast UV index is 0.8. The UV section also shows the following available days.
What wind speed is forecast for Ostrava?
For October 20, 2026, forecast wind speed is 12.8 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.