Fine particles
32.4µg/m³Moderate · 1 hourCAMS model • Open-Meteo
LanzhouAir 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.
Lanzhou - latest available concentrations (September 27, 2026, 09:00 local time): PM2.5: 32.4 µg/m³, PM10: 40.6 µg/m³, O₃: 19 µg/m³, NO₂: 34.3 µg/m³, SO₂: 10.2 µg/m³, CO: 754 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
6 weather warnings in effect for China
Lanzhou · Air pollutant concentrations
Data time: September 27, 2026 · 09:00 · local timeParticulate matter
40.6µg/m³Fair · 1 hourOzone
19µg/m³Good · 1 hourNitrogen dioxide
34.3µg/m³Moderate · 1 hourSulphur dioxide
10.2µg/m³Good · 1 hourCarbon monoxide
754µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Lanzhou
Lanzhou - air pollution over recent days (2026-08-31 - 2026-09-26)
Concentrations of all available pollutants for this city.
PM2.5Lowest 13.85 2026-09-07Highest 22.7 2026-09-062026-08-31 - 2026-09-26
PM10Lowest 24.93 2026-09-07Highest 81.83 2026-09-022026-08-31 - 2026-09-26
O₃Lowest 52.29 2026-09-07Highest 116.92 2026-09-032026-08-31 - 2026-09-26
NO₂Lowest 5.18 2026-09-03Highest 31.22 2026-09-242026-08-31 - 2026-09-26
SO₂Lowest 2.11 2026-09-01Highest 8.92 2026-09-222026-08-31 - 2026-09-26
COLowest 248.67 2026-09-04Highest 811.75 2026-09-252026-08-31 - 2026-09-26
Scroll the chart or table sideways to see the full period.
| 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 | 13.89 | 19.26 | 19.03 | 15.28 | 20.52 | 22.25 | 14.34 | 13.85 | 22.7 | 20.18 | 18.43 | 16.08 | 15.13 | 15.65 | 19.82 |
| PM10 | 35.67 | 44.8 | 26.36 | 48.14 | 42.59 | 31.58 | 27.88 | 24.93 | 55.09 | 81.56 | 59.96 | 78.76 | 81.83 | 81.62 | 37.67 |
| O₃ | 64.58 | 55.46 | 55.38 | 73.67 | 65.71 | 56.54 | 64.46 | 52.29 | 106.71 | 104.92 | 109.08 | 116.92 | 112.63 | 108.63 | 82.67 |
| NO₂ | 18.38 | 22.99 | 31.22 | 13.28 | 23.83 | 25.79 | 21.7 | 13.3 | 7.3 | 8.14 | 8.28 | 5.18 | 6 | 7.21 | 25.43 |
| SO₂ | 5.32 | 7.07 | 8.15 | 3.28 | 8.92 | 7.39 | 6.99 | 4.6 | 2.82 | 2.41 | 2.54 | 2.16 | 2.22 | 2.11 | 7.42 |
| CO | 667.46 | 811.75 | 694.42 | 572.42 | 680.54 | 749.54 | 447.58 | 320.42 | 276.08 | 375.25 | 248.67 | 271.75 | 319.71 | 416.42 | 443.54 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Lanzhou
Lanzhou - air pollution history (2018-10 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 17 2019-08Highest 66.7 2018-112018-10 - 2020-05
PM10Lowest 50.4 2019-06Highest 175 2018-112018-10 - 2020-05
O₃Lowest 33.8 2018-12Highest 151 2019-072018-10 - 2020-05
NO₂Lowest 47.3 2019-05Highest 92.6 2019-122018-10 - 2020-05
SO₂Lowest 10.4 2019-05Highest 41.5 2019-012018-10 - 2020-05
COLowest 1 2018-11Highest 963 2018-102018-10 - 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 31.7 | 34.7 | 37.6 | 40.4 | 58.7 | 65.8 | 45.4 | 32.3 | 23 | 17 | 17.6 | 17.1 | 34 | 33.4 | 40.7 | 45.3 | 58.1 | 63.2 | 66.7 | 43.8 |
| PM10 | 90.9 | 102 | 104 | 94.1 | 91.1 | 126 | 99.1 | 72.9 | 56.2 | 53.1 | 56.5 | 50.4 | 118 | 90.4 | 107 | 101 | 104 | 138 | 175 | 108 |
| O₃ | 144 | 121 | 109 | 100 | 66.4 | 49.4 | 55.9 | 69.9 | 113 | 144 | 151 | 130 | 126 | 136 | 105 | 75.5 | 49.3 | 33.8 | 47 | 75.9 |
| NO₂ | 52.6 | 52.3 | 55 | 56.1 | 75.2 | 92.6 | 68.8 | 59.1 | 52.5 | 54 | 53.8 | 49 | 47.3 | 58.6 | 65.5 | 53.2 | 70.4 | 61.7 | 66.3 | 55.9 |
| SO₂ | 10.8 | 15.3 | 14.8 | 24.8 | 27.3 | 40.9 | 20.8 | 15.6 | 12.9 | 12.4 | 10.8 | 10.8 | 10.4 | 15.1 | 20.3 | 26.7 | 41.5 | 39.5 | 34.7 | 19.5 |
| CO | 581 | 931 | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 924 | 785 | 721 | 887 | 1 | 1 | 2 | 1 | 1 | 963 |
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 1
AIR QUALITY ARCHIVE · 铁路设计院
铁路设计院
Station code: 铁路设计院
Monthly monitoring station data.
PM2.5Lowest 17 2019-08Highest 66.7 2018-112018-10 - 2020-05
PM10Lowest 50.4 2019-06Highest 175 2018-112018-10 - 2020-05
O₃Lowest 33.8 2018-12Highest 151 2019-072018-10 - 2020-05
NO₂Lowest 47.3 2019-05Highest 92.6 2019-122018-10 - 2020-05
SO₂Lowest 10.4 2019-05Highest 41.5 2019-012018-10 - 2020-05
COLowest 1 2018-11Highest 963 2018-102018-10 - 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 31.7 | 34.7 | 37.6 | 40.4 | 58.7 | 65.8 | 45.4 | 32.3 | 23 | 17 | 17.6 | 17.1 | 34 | 33.4 | 40.7 | 45.3 | 58.1 | 63.2 | 66.7 | 43.8 |
| PM10 | 90.9 | 102 | 104 | 94.1 | 91.1 | 126 | 99.1 | 72.9 | 56.2 | 53.1 | 56.5 | 50.4 | 118 | 90.4 | 107 | 101 | 104 | 138 | 175 | 108 |
| O₃ | 144 | 121 | 109 | 100 | 66.4 | 49.4 | 55.9 | 69.9 | 113 | 144 | 151 | 130 | 126 | 136 | 105 | 75.5 | 49.3 | 33.8 | 47 | 75.9 |
| NO₂ | 52.6 | 52.3 | 55 | 56.1 | 75.2 | 92.6 | 68.8 | 59.1 | 52.5 | 54 | 53.8 | 49 | 47.3 | 58.6 | 65.5 | 53.2 | 70.4 | 61.7 | 66.3 | 55.9 |
| SO₂ | 10.8 | 15.3 | 14.8 | 24.8 | 27.3 | 40.9 | 20.8 | 15.6 | 12.9 | 12.4 | 10.8 | 10.8 | 10.4 | 15.1 | 20.3 | 26.7 | 41.5 | 39.5 | 34.7 | 19.5 |
| CO | 581 | 931 | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 924 | 785 | 721 | 887 | 1 | 1 | 2 | 1 | 1 | 963 |
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 ↗ChinaAQIData
Environment and quality of life ratings · Lanzhou
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Lanzhou | Mongolia | Bhutan | Macau | Hong Kong | Myanmar |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 58% | 27% | 82% | — | 52% | 33% |
| particulate matter PM2.5 (µg/m³) | 54 | — | — | — | — | — |
| Pleasure of spending time in the city | 45% | 22% | 61% | — | 43% | 24% |
| particulate matter PM10 (µg/m³) | 132 | — | — | — | — | — |
| Air Pollution | 68% | 87% | 45% | — | 67% | 83% |
| Garbage Disposal | 83% | 27% | 47% | — | 52% | 12% |
| Availability and quality of drinking water | 75% | 46% | 64% | — | 66% | 34% |
| Cleanliness and tidiness | 75% | 29% | 57% | — | 54% | 18% |
| Noise and Light pollution | 8.3% | 48% | 55% | — | 66% | 52% |
| Water Pollution | 33% | 68% | 56% | — | 53% | 74% |
Air quality in nearby cities
All cities →China↗
Tianshui
PM2.525.3
PM1025.6
µg/m³
PM2.5 · ModerateNO₂ 17.8O₃ 68
September 27, 202609:00
China↗
Chengdu
PM2.571.2
PM1071.7
µg/m³
PM2.5 · PoorNO₂ 49.9O₃ 67
September 27, 202609:00
China↗
Nanchong
PM2.537.5
PM1037.5
µg/m³
PM2.5 · ModerateNO₂ 21.8O₃ 42
September 27, 202609:00
China↗
Shiyan
PM2.533.3
PM1033.5
µg/m³
PM2.5 · ModerateNO₂ 12.7O₃ 61
September 27, 202609:00
China↗
Chongqing
PM2.558.7
PM1058.8
µg/m³
PM2.5 · PoorNO₂ 69.2O₃ 33
September 27, 202609:00
China↗
Kaifeng
PM2.538.9
PM1039
µg/m³
PM2.5 · ModerateNO₂ 28O₃ 41
September 27, 202609:00
China↗
Zhumadian
PM2.550.6
PM1050.6
µg/m³
PM2.5 · PoorNO₂ 33.3O₃ 32
September 27, 202609:00
China↗
Xi’an
PM2.585.9
PM1086.4
µg/m³
PM2.5 · PoorNO₂ 45.4O₃ 16
September 27, 202609:00
China · air quality in other cities
WEATHER & SURROUNDINGS
Lanzhou · weather forecast
Daily maximum and minimum temperatures. Forecast point: 36.057, 103.8399.
Scroll the forecast to see the following days.
Lanzhou · September 24, 2026: minimum temperature 11.2°C, maximum 22°C. Wind: 11.9 km/h. Humidity: 65%.
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 | 16.7 | 11.2 | 22 | 19.6 | 1.4 | 3.3 | 65 | 100 |
| 2026-09-25 | 18.4 | 17.1 | 21.9 | 19.1 | 0.2 | 4 | 51 | 100 |
| 2026-09-26 | 20.4 | 16.1 | 25.2 | 21.9 | 1.9 | 3.9 | 45 | 100 |
| 2026-09-27 | 19.8 | 15.6 | 21.7 | 15.6 | 0.5 | 3.1 | 43 | 100 |
| 2026-09-28 | 19.5 | 13.8 | 22.1 | 19 | 3.2 | 2.2 | 50 | 100 |
| 2026-09-29 | 20.2 | 16.1 | 23.7 | 19 | 0.7 | 7 | 44 | 2 |
| 2026-09-30 | 16.6 | 14.8 | 18.6 | 15.1 | 14.8 | 5.7 | 35 | 99 |
| 2026-10-01 | 17.4 | 13.8 | 20.7 | 18 | 0.6 | 2.3 | 42 | 18 |
| 2026-10-02 | 20.2 | 16.2 | 24.4 | 20 | 7.1 | 3.5 | 47 | 4 |
| 2026-10-03 | 21.7 | 17.3 | 22.3 | 17.3 | 0.7 | 7.9 | 28 | 89 |
| 2026-10-04 | 14.4 | 10 | 16.1 | 10 | 0.5 | 7.4 | 32 | 14 |
| 2026-10-05 | 15.6 | 10.4 | 22.3 | 13.6 | 0.7 | 8.7 | 33 | 100 |
| 2026-10-06 | 10.7 | 10.1 | 15.2 | 11.8 | 4.4 | 4.5 | 58 | 100 |
| 2026-10-07 | 12.8 | 9.8 | 17.2 | 12 | 1.3 | 5.8 | 28 | 8 |
| 2026-10-08 | 13.4 | 10.3 | 16.9 | 13.8 | 1.8 | 5.4 | 39 | 16 |
| 2026-10-09 | 13.5 | 11.9 | 16.5 | 15 | — | 2.3 | 48 | 99 |
| 2026-10-10 | 16.3 | 13.7 | 19.5 | 15.6 | — | 3.8 | 42 | 90 |
| 2026-10-11 | 15.7 | 13.4 | 19.3 | 16.2 | — | 2.9 | 53 | 100 |
UV index by day · Lanzhou
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.
Lanzhou · September 26, 2026: UV index: 5.5 .
| 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 | 5.5 | 0.8 | 5.2 | 5.5 | 5.4 | 4.4 | 4.8 | 2.6 | 4.8 | 4.8 | 3.6 | 4.7 | 4.5 | 3.2 | 4.5 | — |
AIR QUALITY QUESTIONS
Lanzhou · air pollution - questions and answers
What do the latest air quality data show for Lanzhou?
Lanzhou - latest available concentrations (September 27, 2026, 09:00 local time): PM2.5: 32.4 µg/m³, PM10: 40.6 µg/m³, O₃: 19 µg/m³, NO₂: 34.3 µg/m³, SO₂: 10.2 µg/m³, CO: 754 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Lanzhou over the past week?
The highest available daily mean PM2.5 was 22.2 µg/m³ (September 21, 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 Lanzhou cover?
Available monthly means cover 2018-10 - 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 Lanzhou 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 Lanzhou?
For September 26, 2026, the forecast UV index is 5.5. The UV section also shows the following available days.
What wind speed is forecast for Lanzhou?
For September 24, 2026, forecast wind speed is 11.9 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.