Fine particles
2.8µg/m³Good · 1 hourCAMS model • Open-Meteo
CalgaryAir 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.
Calgary - latest available concentrations (September 26, 2026, 19:00 local time): PM2.5: 2.8 µg/m³, PM10: 2.8 µg/m³, O₃: 50 µg/m³, NO₂: 11.1 µg/m³, SO₂: 2.6 µg/m³, CO: 257 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
4 weather warnings in effect for Canada
Calgary · Air pollutant concentrations
Data time: September 26, 2026 · 19:00 · local timeParticulate matter
2.8µg/m³Good · 1 hourOzone
50µg/m³Good · 1 hourNitrogen dioxide
11.1µg/m³Fair · 1 hourSulphur dioxide
2.6µg/m³Good · 1 hourCarbon monoxide
257µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Calgary
Calgary - air pollution over recent days (2026-08-30 - 2026-09-25)
Concentrations of all available pollutants for this city.
PM2.5Lowest 4.09 2026-09-20Highest 14.8 2026-09-062026-08-30 - 2026-09-25
PM10Lowest 4.35 2026-09-20Highest 15.31 2026-09-062026-08-30 - 2026-09-25
O₃Lowest 35.75 2026-09-06Highest 81.54 2026-08-302026-08-30 - 2026-09-25
NO₂Lowest 7.98 2026-08-30Highest 38.39 2026-09-232026-08-30 - 2026-09-25
SO₂Lowest 2.05 2026-08-30Highest 6.85 2026-09-232026-08-30 - 2026-09-25
COLowest 157.83 2026-08-30Highest 385.63 2026-09-012026-08-30 - 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 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 | 2026-08-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 9.89 | 12.33 | 14.06 | 5.35 | 4.89 | 4.09 | 6.83 | 14.8 | 6.17 | 8.49 | 8.25 | 11.94 | 6.97 | 4.54 | 8.48 |
| PM10 | 10.98 | 12.98 | 15.03 | 5.59 | 5.06 | 4.35 | 6.98 | 15.31 | 6.4 | 9.19 | 8.9 | 13.21 | 7.24 | 4.6 | 8.68 |
| O₃ | 53.54 | 39.42 | 37 | 52.75 | 47.21 | 58.08 | 63.04 | 35.75 | 41.13 | 42.25 | 66.96 | 48.63 | 44.92 | 55.83 | 81.54 |
| NO₂ | 15.58 | 22.71 | 38.39 | 20.49 | 25.34 | 14.06 | 12.05 | 15.75 | 8.76 | 16.86 | 12.55 | 23.18 | 18.24 | 9.05 | 7.98 |
| SO₂ | 2.91 | 6.09 | 6.85 | 3.7 | 3.88 | 3.15 | 3.2 | 4.23 | 2.71 | 2.89 | 2.13 | 3.6 | 3.05 | 2.27 | 2.05 |
| CO | 283.71 | 275.17 | 365.5 | 269.83 | 264.13 | 232.08 | 236.63 | 232.83 | 231.21 | 219.08 | 255.42 | 352.04 | 385.63 | 221.17 | 157.83 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Calgary
Calgary - air pollution history (2016-03 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 1.86 2016-04Highest 41.4 2018-082016-03 - 2020-05
O₃ (ppm)Lowest 0.0115 2018-11Highest 0.0378 2018-042016-03 - 2020-05
NO₂ (ppm)Lowest 0.004 2018-06Highest 0.0266 2018-112016-03 - 2020-05
CO (ppm)Lowest 0.0221 2017-04Highest 0.586 2018-032016-03 - 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 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 µg/m³ | 5.08 | 4.91 | 6.56 | 5.61 | 8.05 | 6.36 | 4.65 | 6.43 | 4.9 | 5.93 | 5.5 | 5.16 | 12.55 | 4.34 | 9.87 | 10.47 | 6.94 | 6.22 | 6.87 | 6.07 | 6.63 | 41.4 | 9.13 | 4.99 | 7.39 | 9.27 | 14.7 | 3.45 | 5.76 | 4.84 | 10.5 | 3.64 | 11.4 | 18.9 | 14.3 | 5.03 | 3.61 | 4.31 | — | — | — | — | — | — | — | 5.06 | — | — | — | 1.86 | 3.41 |
| O₃ (ppm) | 0.0352 | 0.03705 | 0.031 | 0.0232 | 0.0171 | 0.01665 | 0.0181 | 0.0209 | 0.0222 | 0.0252 | 0.02875 | 0.0305 | 0.03275 | 0.0345 | 0.02905 | 0.02055 | 0.0155 | 0.01615 | 0.0115 | 0.0168 | 0.015 | 0.0261 | 0.0359 | 0.0364 | 0.0375 | 0.0378 | 0.0323 | 0.0284 | 0.02 | 0.0234 | 0.0182 | 0.0234 | 0.0267 | 0.0316 | 0.0359 | 0.0345 | 0.0343 | 0.0311 | — | — | — | — | — | — | 0.0217 | 0.0185 | — | — | — | 0.0373 | 0.0313 |
| NO₂ (ppm) | 0.0055 | 0.00645 | 0.012175 | 0.0175 | 0.0234 | 0.0226 | 0.01685 | 0.01395 | 0.00675 | 0.006355 | 0.005595 | 0.0059 | 0.00792 | 0.00903 | 0.017 | 0.0197 | 0.02035 | 0.02095 | 0.0266 | 0.01136 | 0.007395 | 0.008795 | 0.00475 | 0.004 | 0.005 | 0.0115 | 0.0171 | 0.0132 | 0.0181 | 0.0137 | 0.0167 | 0.00903 | 0.0085 | 0.00718 | 0.0058 | 0.00447 | 0.00523 | 0.00567 | — | — | — | — | — | — | 0.00433 | 0.00783 | — | — | — | — | 0.00767 |
| CO (ppm) | 0.3305 | 0.3035 | 0.3765 | 0.39 | 0.4115 | 0.498 | 0.41 | 0.3425 | 0.239 | 0.2125 | 0.13605 | 0.1545 | 0.202 | 0.2735 | 0.3415 | 0.353 | 0.487 | 0.4065 | 0.567 | 0.4185 | 0.2895 | 0.5245 | 0.157 | 0.0873 | 0.0819 | 0.072 | 0.586 | 0.202 | 0.222 | 0.231 | 0.24 | 0.167 | 0.239 | 0.299 | 0.0609 | 0.0464 | 0.0476 | 0.0221 | — | — | — | — | — | — | 0.153 | 0.19 | — | — | — | 0.447 | 0.277 |
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 2
AIR QUALITY ARCHIVE · Calgary Central2
Calgary Central2
Station code: Calgary Central2
Monthly monitoring station data.
PM2.5Lowest 4.06 2020-05Highest 38.8 2018-082018-08 - 2020-05
O₃ (ppm)Lowest 0.0058 2018-11Highest 0.0356 2020-042018-08 - 2020-05
NO₂ (ppm)Lowest 0.00667 2020-05Highest 0.0352 2018-112018-08 - 2020-05
CO (ppm)Lowest 0.164 2019-06Highest 0.585 2018-082018-08 - 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 µg/m³ | 4.06 | 4.69 | 7.24 | 6.72 | 9.57 | 8.28 | 5.89 | 5.98 | 4.56 | 5.56 | 5.41 | 4.99 | 13.8 | 4.85 | 10.4 | 11.1 | 8.72 | 8.01 | 8.81 | 6.85 | 6.47 | 38.8 |
| O₃ (ppm) | 0.0348 | 0.0356 | 0.0288 | 0.0223 | 0.0137 | 0.0132 | 0.015 | 0.0188 | 0.0216 | 0.0242 | 0.0284 | 0.0301 | 0.0327 | 0.0325 | 0.0256 | 0.0182 | 0.0118 | 0.0119 | 0.0058 | 0.0152 | 0.0138 | 0.0214 |
| NO₂ (ppm) | 0.00667 | 0.00793 | 0.0149 | 0.0221 | 0.0283 | 0.028 | 0.021 | 0.0173 | 0.00773 | 0.00794 | 0.00684 | 0.0074 | 0.00929 | 0.0113 | 0.0205 | 0.0225 | 0.0249 | 0.0264 | 0.0352 | 0.0128 | 0.00833 | 0.011 |
| CO (ppm) | 0.44 | 0.315 | 0.327 | 0.402 | 0.365 | 0.519 | 0.417 | 0.317 | 0.205 | 0.233 | 0.178 | 0.164 | 0.182 | 0.352 | 0.339 | 0.405 | 0.501 | 0.463 | 0.497 | 0.372 | 0.279 | 0.585 |
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 ↗AirNow
AIR QUALITY ARCHIVE · Calgary Northwest
Calgary Northwest
Station code: Calgary Northwest
Monthly monitoring station data.
PM2.5Lowest 1.86 2016-04Highest 44 2018-082016-03 - 2020-05
O₃ (ppm)Lowest 0.0162 2018-09Highest 0.0385 2020-042016-03 - 2020-05
NO₂ (ppm)Lowest 0.004 2018-06Highest 0.0185 2020-012016-03 - 2020-05
CO (ppm)Lowest 0.0221 2017-04Highest 0.637 2018-112016-03 - 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 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 µg/m³ | 6.11 | 5.12 | 5.88 | 4.49 | 6.53 | 4.44 | 3.41 | 6.88 | 5.24 | 6.3 | 5.58 | 5.32 | 11.3 | 3.84 | 9.34 | 9.85 | 5.16 | 4.43 | 4.92 | 5.29 | 6.79 | 44 | 9.13 | 4.99 | 7.39 | 9.27 | 14.7 | 3.45 | 5.76 | 4.84 | 10.5 | 3.64 | 11.4 | 18.9 | 14.3 | 5.03 | 3.61 | 4.31 | — | — | — | — | — | — | — | 5.06 | — | — | — | 1.86 | 3.41 |
| O₃ (ppm) | 0.0356 | 0.0385 | 0.0332 | 0.0241 | 0.0205 | 0.0201 | 0.0212 | 0.023 | 0.0228 | 0.0262 | 0.0291 | 0.0309 | 0.0328 | 0.0365 | 0.0325 | 0.0229 | 0.0192 | 0.0204 | 0.0172 | 0.0184 | 0.0162 | 0.0308 | 0.0359 | 0.0364 | 0.0375 | 0.0378 | 0.0323 | 0.0284 | 0.02 | 0.0234 | 0.0182 | 0.0234 | 0.0267 | 0.0316 | 0.0359 | 0.0345 | 0.0343 | 0.0311 | — | — | — | — | — | — | 0.0217 | 0.0185 | — | — | — | 0.0373 | 0.0313 |
| NO₂ (ppm) | 0.00433 | 0.00497 | 0.00945 | 0.0129 | 0.0185 | 0.0172 | 0.0127 | 0.0106 | 0.00577 | 0.00477 | 0.00435 | 0.0044 | 0.00655 | 0.00676 | 0.0135 | 0.0169 | 0.0158 | 0.0155 | 0.018 | 0.00992 | 0.00646 | 0.00659 | 0.00475 | 0.004 | 0.005 | 0.0115 | 0.0171 | 0.0132 | 0.0181 | 0.0137 | 0.0167 | 0.00903 | 0.0085 | 0.00718 | 0.0058 | 0.00447 | 0.00523 | 0.00567 | — | — | — | — | — | — | 0.00433 | 0.00783 | — | — | — | — | 0.00767 |
| CO (ppm) | 0.221 | 0.292 | 0.426 | 0.378 | 0.458 | 0.477 | 0.403 | 0.368 | 0.273 | 0.192 | 0.0941 | 0.145 | 0.222 | 0.195 | 0.344 | 0.301 | 0.473 | 0.35 | 0.637 | 0.465 | 0.3 | 0.464 | 0.157 | 0.0873 | 0.0819 | 0.072 | 0.586 | 0.202 | 0.222 | 0.231 | 0.24 | 0.167 | 0.239 | 0.299 | 0.0609 | 0.0464 | 0.0476 | 0.0221 | — | — | — | — | — | — | 0.153 | 0.19 | — | — | — | 0.447 | 0.277 |
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 ↗AirNow
Environment and quality of life ratings · Calgary
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Calgary | United States | Saint Pierre and Miquelon | The Bahamas | Venezuela | Iceland |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 78% | 70% | — | 50% | 41% | 72% |
| particulate matter PM2.5 (µg/m³) | 8 | — | — | — | — | — |
| Pleasure of spending time in the city | 81% | 75% | — | 53% | 41% | 89% |
| particulate matter PM10 (µg/m³) | 14 | — | — | — | — | — |
| Air Pollution | 21% | 29% | — | 52% | 59% | 13% |
| Garbage Disposal | 78% | 71% | — | 29% | 18% | 79% |
| Availability and quality of drinking water | 86% | 71% | — | 55% | 28% | 96% |
| Cleanliness and tidiness | 74% | 60% | — | 35% | 22% | 75% |
| Noise and Light pollution | 41% | 47% | — | 39% | 47% | 23% |
| Water Pollution | 28% | 44% | — | 58% | 76% | 8.4% |
Air quality in nearby cities
All cities →Canada↗
Edmonton
PM2.50.9
PM101
µg/m³
PM2.5 · GoodNO₂ 5.7O₃ 66
September 26, 202619:00
Canada↗
Okanagan
PM2.51.1
PM101.5
µg/m³
PM2.5 · GoodNO₂ 1.5O₃ 80
September 26, 202618:00
Canada↗
Surrey
PM2.57.6
PM109.6
µg/m³
PM2.5 · FairNO₂ 22.1O₃ 51
September 26, 202618:00
Canada↗
Vancouver
PM2.57.2
PM109.4
µg/m³
PM2.5 · FairNO₂ 20O₃ 60
September 26, 202618:00
Canada↗
Victoria
PM2.528.3
PM1031.3
µg/m³
PM2.5 · ModerateNO₂ 14.4O₃ 65
September 26, 202618:00
Canada↗
Winnipeg
PM2.51.4
PM101.4
µg/m³
PM2.5 · GoodNO₂ 7.3O₃ 48
September 26, 202620:00
Canada↗
London
PM2.53.4
PM103.4
µg/m³
PM2.5 · GoodNO₂ 12.7O₃ 43
September 26, 202621:00
Canada↗
Kitchener
PM2.51.9
PM101.9
µg/m³
PM2.5 · GoodNO₂ 9.5O₃ 52
September 26, 202621:00
Canada · air quality in other cities
WEATHER & SURROUNDINGS
Calgary · weather forecast
Daily maximum and minimum temperatures. Forecast point: 51.0501, -114.0853.
Scroll the forecast to see the following days.
Calgary · September 24, 2026: minimum temperature 4.9°C, maximum 17.9°C. Wind: 12 km/h. Humidity: 71%.
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 | 14.9 | 4.9 | 17.9 | 12.3 | 11.3 | 3.3 | 71 | 47 |
| 2026-09-25 | 19.7 | 7.4 | 21.7 | 11.8 | 0.1 | 6.4 | 55 | 96 |
| 2026-09-26 | 9.4 | 1.2 | 10.4 | 2.4 | 5.6 | 4.2 | 77 | 91 |
| 2026-09-27 | 10.5 | -5.7 | 12.4 | 6.1 | 1.6 | 2.9 | 51 | 53 |
| 2026-09-28 | 14.2 | 1.8 | 15.9 | 10.6 | 2.6 | 3.1 | 40 | 12 |
| 2026-09-29 | 14.1 | 6.4 | 15.8 | 8.9 | 0.2 | 4 | 45 | 85 |
| 2026-09-30 | 8.7 | 4.6 | 10.7 | 4.6 | 7.8 | 1.7 | 74 | 47 |
| 2026-10-01 | 6.5 | 2.2 | 6.5 | 2.9 | 8.1 | 4.1 | 83 | 97 |
| 2026-10-02 | 2.8 | 0.7 | 5.3 | 3.5 | 3.5 | 6.1 | 98 | 100 |
| 2026-10-03 | 5.5 | 1 | 7.9 | 3.5 | 0.1 | 2.9 | 73 | 100 |
| 2026-10-04 | 8.9 | 0 | 12.7 | 6.5 | — | 2.5 | 47 | 35 |
| 2026-10-05 | 11.2 | 4.4 | 14 | 9 | — | 4.8 | 61 | 42 |
| 2026-10-06 | 14.2 | 5.4 | 18 | 9.6 | — | 5.3 | 41 | 100 |
| 2026-10-07 | 13.3 | 5.7 | 16.4 | 9.6 | 0.1 | 4.4 | 42 | 3 |
| 2026-10-08 | 12.4 | 6.2 | 16.2 | 9.8 | — | 2.3 | 49 | 100 |
| 2026-10-09 | 11.4 | 6.3 | 12.9 | 9.1 | — | 3.1 | 60 | 77 |
| 2026-10-10 | 11.5 | 6.7 | 14.2 | 9.2 | — | 4.8 | 57 | 89 |
UV index by day · Calgary
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.
Calgary · September 26, 2026: UV index: 1.9 .
| 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 | 1.9 | 4.4 | 4.3 | 3.3 | 3.9 | 1.6 | 3.4 | 3.6 | 3.8 | 3.8 | 3.1 | 3.8 | 3.3 | 3.2 | 3.5 | — |
AIR QUALITY QUESTIONS
Calgary · air pollution - questions and answers
What do the latest air quality data show for Calgary?
Calgary - latest available concentrations (September 26, 2026, 19:00 local time): PM2.5: 2.8 µg/m³, PM10: 2.8 µg/m³, O₃: 50 µg/m³, NO₂: 11.1 µg/m³, SO₂: 2.6 µg/m³, CO: 257 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Calgary over the past week?
The highest available daily mean PM2.5 was 14.1 µg/m³ (September 23, 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 Calgary cover?
Available monthly means cover 2016-03 - 2020-05. The tables include PM2.5, O₃ (ppm), NO₂ (ppm), CO (ppm). 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 Calgary 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 Calgary?
For September 26, 2026, the forecast UV index is 1.9. The UV section also shows the following available days.
What wind speed is forecast for Calgary?
For September 24, 2026, forecast wind speed is 12 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.