CAMS 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 (September 27, 2026, 03:00 local time): PM2.5: 12.7 µg/m³, PM10: 17.4 µg/m³, O₃: 33 µg/m³, NO₂: 10.2 µg/m³, SO₂: 1.4 µg/m³, CO: 252 µg/m³. These are hourly CAMS model values for a point representing the city.

Air quality questions →

Ostrava · Air pollutant concentrations

Data time: September 27, 2026 · 03:00 · local time

PM2.5

Fine particles

12.7µg/m³Fair · 1 hour

PM10

Particulate matter

17.4µg/m³Fair · 1 hour

O₃

Ozone

33µg/m³Good · 1 hour

NO₂

Nitrogen dioxide

10.2µg/m³Fair · 1 hour

SO₂

Sulphur dioxide

1.4µg/m³Good · 1 hour

Carbon monoxide

252µg/m³

PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →

DAILY DATA · Ostrava

Ostrava - air pollution over recent days (2026-08-31 - 2026-09-26)

Concentrations of all available pollutants for this city.

PM2.5Lowest 4.53 2026-09-05Highest 11.62 2026-09-262026-08-31 - 2026-09-26

Scroll the chart or table sideways to see the full period.

Ostrava · daily averages · µg/m³
Pollutant	2026-09-26	2026-09-25	2026-09-24	2026-09-23	2026-09-22	2026-09-21	2026-09-20	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	11.62	10.99	9.26	6.48	4.92	4.7	7.2	10.42	5.11	4.53	5.24	10.88	8.07	4.9	7.48
PM10	15.73	14.9	11.08	8.15	7.5	7.3	11.25	15.18	9.18	6	7.55	14.7	11.69	7.28	10.81
O₃	53.83	48.21	46.88	44.83	52.38	57.17	64.38	56.13	60.25	61.88	61	61.13	59.33	63.13	62.13
NO₂	8.21	12.02	9.59	6.29	4.49	4.84	4.39	13.03	3.66	4.27	5.49	10.73	8.84	5.12	8.01
SO₂	1.57	2.22	1.57	1.32	0.88	0.8	1.02	3.8	0.93	0.89	0.92	1.98	1.78	0.85	1.23
CO	245.96	264.67	258.42	225.13	199.17	202.38	198.17	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.

How should I interpret the data and averaging period? →

Open-Meteo / CAMS ↗

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

Scroll the chart or table sideways to see the full period.

Ostrava · monthly averages · µg/m³
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.

How should I interpret the data and averaging period? →

OpenAQ ↗

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

Scroll the chart or table sideways to see the full period.

CZ0TOCB · monthly averages · µg/m³
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

Scroll the chart or table sideways to see the full period.

CZ0TOFF · monthly averages · µg/m³
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

Scroll the chart or table sideways to see the full period.

Ostrava-Privoz · monthly averages · µg/m³
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%

NO₂ 8.9O₃ 42

September 27, 202603:00

Czech Republic · air quality in other cities

Prague Brno Plzeň Olomouc

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 · September 24, 2026: minimum temperature 7.6°C, maximum 14.3°C. Wind: 17.8 km/h. Humidity: 59%.

Full forecast: temperature, rainfall, wind and humidity

Date	Day °C	Min °C	Max °C	Night °C	Rain mm	Wind m/s	Humidity %	Clouds %
2026-09-24	14.3	7.6	14.3	11.5	2.5	5	59	55
2026-09-25	13.5	10.6	14.7	10.6	0.7	3.1	64	100
2026-09-26	16	7.8	18.3	11.4	9.5	4	58	26
2026-09-27	16.5	8.9	18.3	11.2	0.4	2	57	98
2026-09-28	19.2	7.5	21.4	11.7	—	2.2	59	5
2026-09-29	17.6	8.1	21.3	11.6	2.1	2.1	64	8
2026-09-30	17.6	8.3	21.5	11.7	3.8	2.9	64	14
2026-10-01	18	9.2	22	13.3	2.1	2.5	59	20
2026-10-02	18.2	11.4	21.6	13	0.4	2.8	47	18
2026-10-03	15.8	12.4	16.9	12.4	0.7	2.5	71	100
2026-10-04	13.3	11.1	15	11.3	0.2	6.3	54	100
2026-10-05	9.9	7	11.1	8.6	0.8	6	72	100
2026-10-06	8.2	6	8.4	6.2	8.1	5	77	100
2026-10-07	8.5	6.5	8.5	6.7	0.3	4.8	64	98
2026-10-08	8.6	4.7	9.7	4.7	2.1	4.7	67	86
2026-10-09	8.3	3	10.9	7.3	—	4.8	62	98
2026-10-10	8	7.2	8.2	7.6	0.8	3.1	73	100
2026-10-11	9.6	4.9	12.6	9.9	—	2.9	65	19

UV index by day · Ostrava

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.

Ostrava · September 26, 2026: UV index: 4 .

Indicator	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	2026-10-11
UV index	4	3.6	4	4	3.9	3.6	3.6	1.9	3	1.5	0.7	1.5	1.9	2.6	0.5	—

Airborne pollen · Czech Republic

grains/m³ Data for a country reference point. Local conditions may differ.

Czech Republic · September 26, 2026: Alder: 0 grains/m³. Birch: 0 grains/m³. Grass: 0.7 grains/m³. Mugwort: 1.9 grains/m³. Olive: 0 grains/m³. Ragweed: 0 grains/m³.

Indicator	2026-09-26	2026-09-27	2026-09-28	2026-09-29
Alder	0	0	0	0
Birch	0	0	0	0
Grass	0.7	0.4	0.5	0.3
Mugwort	1.9	1.7	1.2	1.1
Olive	0	0	0	0
Ragweed	0	0	0	0

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AIR QUALITY QUESTIONS

Ostrava · air pollution - questions and answers

What do the latest air quality data show for Ostrava?

When was PM2.5 highest in Ostrava over the past week?

The highest available daily mean PM2.5 was 11.6 µg/m³ (September 26, 2026). This comparison covers 7 days with data in the seven days before September 27, 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 September 26, 2026, the forecast UV index is 4. The UV section also shows the following available days.

What wind speed is forecast for Ostrava?

For September 24, 2026, forecast wind speed is 17.8 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.

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