Fine particles
6.4µg/m³Fair · 1 hourCAMS model • Open-Meteo
LeedsAir 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.
Leeds - latest available concentrations (October 23, 2026, 02:00 local time): PM2.5: 6.4 µg/m³, PM10: 10 µg/m³, O₃: 46 µg/m³, NO₂: 11.8 µg/m³, SO₂: 2.2 µg/m³, CO: 197 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
2 weather warnings in effect for United Kingdom
Leeds · Air pollutant concentrations
Data time: October 23, 2026 · 02:00 · local timeParticulate matter
10µg/m³Good · 1 hourOzone
46µg/m³Good · 1 hourNitrogen dioxide
11.8µg/m³Fair · 1 hourSulphur dioxide
2.2µg/m³Good · 1 hourCarbon monoxide
197µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Leeds
Leeds - air pollution over recent days (2026-08-31 - 2026-10-22)
Concentrations of all available pollutants for this city.
PM2.5Lowest 3.09 2026-09-04Highest 12.26 2026-10-202026-08-31 - 2026-10-22
PM10Lowest 6.41 2026-09-03Highest 17.01 2026-10-202026-08-31 - 2026-10-22
O₃Lowest 38.83 2026-10-20Highest 62.54 2026-09-072026-08-31 - 2026-10-22
NO₂Lowest 5.55 2026-09-05Highest 19.3 2026-10-212026-08-31 - 2026-10-22
SO₂Lowest 0.49 2026-09-04Highest 2.61 2026-10-202026-08-31 - 2026-10-22
COLowest 134.13 2026-09-03Highest 204.17 2026-10-202026-08-31 - 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 | 4.86 | 7.71 | 12.26 | 7.23 | 3.72 | 3.48 | 3.91 | 4.38 | 7 | 3.99 | 3.09 | 3.65 | 3.86 | 3.75 | 3.59 |
| PM10 | 8.71 | 10.59 | 17.01 | 10.15 | 7.53 | 8.01 | 7.78 | 8.87 | 12.34 | 9.39 | 7.5 | 6.41 | 6.48 | 8.06 | 6.9 |
| O₃ | 50.58 | 41.54 | 38.83 | 44 | 53.54 | 56.54 | 55.29 | 62.54 | 53.25 | 58.25 | 58.08 | 54.13 | 49.63 | 57.46 | 54.75 |
| NO₂ | 16.09 | 19.3 | 16.26 | 13.24 | 9.37 | 8.53 | 11.44 | 6.99 | 11.69 | 5.55 | 5.72 | 7.1 | 11.43 | 8.96 | 7.31 |
| SO₂ | 1.32 | 1.62 | 2.61 | 1.74 | 0.98 | 0.84 | 1.08 | 0.65 | 1.28 | 0.59 | 0.49 | 0.55 | 0.88 | 0.85 | 0.66 |
| CO | 171.17 | 188.83 | 204.17 | 197.33 | 171.33 | 171.21 | 167.25 | 152.67 | 168.42 | 155.17 | 144.33 | 134.13 | 153.83 | 159.21 | 164.33 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Leeds
Leeds - air pollution history (2016-02 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 5.94 2016-08Highest 22.6 2019-022016-02 - 2020-05
PM10Lowest 10.8 2017-12Highest 32.4 2019-022016-02 - 2020-05
O₃Lowest 22.1 2018-11Highest 71.6 2020-042016-02 - 2020-05
NO₂Lowest 12.8 2020-04Highest 45.3 2016-022016-02 - 2020-05
SO₂Lowest 0.99 2016-04Highest 6.65 2016-082016-02 - 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 | 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 | 2016-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 7.18 | 10.1 | 9.82 | 7.72 | 10.5 | 12.1 | 15.3 | 9.81 | 9.03 | 10.3 | 9.47 | 9.41 | 11.5 | 19.6 | 10.6 | 22.6 | 8.55 | 11.3 | 16.8 | 9.14 | 6.88 | 6.92 | 10.2 | 10.9 | 13.9 | 12.6 | 15.1 | 15 | 10.5 | 7.63 | 11.4 | 7.54 | 9.79 | 7.71 | 7.27 | 7.25 | 10.8 | 9.78 | 10.8 | 13.5 | 17.8 | 16.2 | 10.1 | 7.29 | 8.36 | 5.94 | 7.61 | 12.1 | 14.2 | 10.4 | 15 | 19.9 |
| PM10 | 11.6 | 16.3 | 16.5 | 11.1 | 13.5 | 14.6 | 17.7 | 12.5 | 12.6 | 14.1 | 12.2 | 12 | 14.4 | 25 | 16.3 | 32.4 | 17.2 | 17.5 | 22.9 | 14.6 | 12 | 11 | 16.1 | 18.1 | 21.2 | 19.1 | 20.9 | 19.9 | 14.2 | 10.8 | 16.1 | 11.8 | 13 | 11.4 | 13 | 14.7 | 20 | 18.2 | 19.6 | 21 | 23.5 | 24.1 | 16.5 | 14.4 | 16.2 | 13.8 | 11.2 | 17.1 | 19.3 | 14.3 | 20.3 | 26.3 |
| O₃ | 64.3 | 71.6 | 57.1 | 54.4 | 43.5 | 30.1 | 24 | 29.7 | 34.6 | 48.7 | 43.3 | 48.5 | 58.7 | 66.6 | 56.7 | 30.4 | 34.6 | 23.2 | 22.1 | 32.8 | 32.6 | 32.8 | 53.2 | 54.1 | 65.2 | 53 | 44.3 | 34.8 | 34.3 | 33.8 | 28.8 | 31.9 | 28.3 | 34.1 | 39.5 | 44.7 | 53.9 | 50.2 | 41.3 | 35 | 26.2 | 23.7 | 23.6 | 27.1 | 26.5 | 35 | 35.5 | 42.8 | 57.5 | 49.3 | 42.1 | 39.5 |
| NO₂ | 14.5 | 12.8 | 22.1 | 27 | 29.6 | 38 | 35.7 | 33.1 | 23.9 | 21.6 | 19.1 | 21.6 | 21.9 | 23.8 | 27.1 | 43.7 | 36.9 | 43.4 | 36.2 | 31.4 | 30.6 | 21.1 | 21.3 | 22 | 21.5 | 27.9 | 33.8 | 37.5 | 36.4 | 36.8 | 40.2 | 32.7 | 31.8 | 26.3 | 21.7 | 24.7 | 25.9 | 43 | 36 | 37.7 | 42 | 44.9 | 43.6 | 28.8 | 29.1 | 22.1 | 21.3 | 24 | 25.3 | 31.7 | 34.9 | 45.3 |
| SO₂ | 2.7 | 2.59 | 4.81 | 4.02 | 6.06 | 4.9 | 2.45 | 3.13 | 2.05 | 2.16 | 1.58 | 2.64 | 2.93 | 2.63 | 2.28 | 3.79 | 4.36 | 3.89 | 3.3 | 1.65 | 2.63 | 1.48 | 2.25 | 2.85 | 2.67 | 2.53 | 2.39 | 1.91 | 2.9 | 2.57 | 1.13 | 1.61 | 1.63 | 1.66 | 2.36 | 1.97 | 2.93 | 3.67 | 3.27 | 4.47 | 2.74 | 1.22 | 1.34 | 3.7 | 2.95 | 6.65 | 3.68 | 1.9 | 1.19 | 0.99 | 1.35 | 1.42 |
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 · Leeds Centre
Leeds Centre
Station code: Leeds Centre
Monthly monitoring station data.
PM2.5Lowest 5.94 2016-08Highest 22.6 2019-022016-02 - 2020-05
PM10Lowest 10.8 2017-12Highest 32.4 2019-022016-02 - 2020-05
O₃Lowest 22.1 2018-11Highest 71.6 2020-042016-02 - 2020-05
NO₂Lowest 12.8 2020-04Highest 45.3 2016-022016-02 - 2020-05
SO₂Lowest 0.99 2016-04Highest 6.65 2016-082016-02 - 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 | 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 | 2016-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 7.18 | 10.1 | 9.82 | 7.72 | 10.5 | 12.1 | 15.3 | 9.81 | 9.03 | 10.3 | 9.47 | 9.41 | 11.5 | 19.6 | 10.6 | 22.6 | 8.55 | 11.3 | 16.8 | 9.14 | 6.88 | 6.92 | 10.2 | 10.9 | 13.9 | 12.6 | 15.1 | 15 | 10.5 | 7.63 | 11.4 | 7.54 | 9.79 | 7.71 | 7.27 | 7.25 | 10.8 | 9.78 | 10.8 | 13.5 | 17.8 | 16.2 | 10.1 | 7.29 | 8.36 | 5.94 | 7.61 | 12.1 | 14.2 | 10.4 | 15 | 19.9 |
| PM10 | 11.6 | 16.3 | 16.5 | 11.1 | 13.5 | 14.6 | 17.7 | 12.5 | 12.6 | 14.1 | 12.2 | 12 | 14.4 | 25 | 16.3 | 32.4 | 17.2 | 17.5 | 22.9 | 14.6 | 12 | 11 | 16.1 | 18.1 | 21.2 | 19.1 | 20.9 | 19.9 | 14.2 | 10.8 | 16.1 | 11.8 | 13 | 11.4 | 13 | 14.7 | 20 | 18.2 | 19.6 | 21 | 23.5 | 24.1 | 16.5 | 14.4 | 16.2 | 13.8 | 11.2 | 17.1 | 19.3 | 14.3 | 20.3 | 26.3 |
| O₃ | 64.3 | 71.6 | 57.1 | 54.4 | 43.5 | 30.1 | 24 | 29.7 | 34.6 | 48.7 | 43.3 | 48.5 | 58.7 | 66.6 | 56.7 | 30.4 | 34.6 | 23.2 | 22.1 | 32.8 | 32.6 | 32.8 | 53.2 | 54.1 | 65.2 | 53 | 44.3 | 34.8 | 34.3 | 33.8 | 28.8 | 31.9 | 28.3 | 34.1 | 39.5 | 44.7 | 53.9 | 50.2 | 41.3 | 35 | 26.2 | 23.7 | 23.6 | 27.1 | 26.5 | 35 | 35.5 | 42.8 | 57.5 | 49.3 | 42.1 | 39.5 |
| NO₂ | 14.5 | 12.8 | 22.1 | 27 | 29.6 | 38 | 35.7 | 33.1 | 23.9 | 21.6 | 19.1 | 21.6 | 21.9 | 23.8 | 27.1 | 43.7 | 36.9 | 43.4 | 36.2 | 31.4 | 30.6 | 21.1 | 21.3 | 22 | 21.5 | 27.9 | 33.8 | 37.5 | 36.4 | 36.8 | 40.2 | 32.7 | 31.8 | 26.3 | 21.7 | 24.7 | 25.9 | 43 | 36 | 37.7 | 42 | 44.9 | 43.6 | 28.8 | 29.1 | 22.1 | 21.3 | 24 | 25.3 | 31.7 | 34.9 | 45.3 |
| SO₂ | 2.7 | 2.59 | 4.81 | 4.02 | 6.06 | 4.9 | 2.45 | 3.13 | 2.05 | 2.16 | 1.58 | 2.64 | 2.93 | 2.63 | 2.28 | 3.79 | 4.36 | 3.89 | 3.3 | 1.65 | 2.63 | 1.48 | 2.25 | 2.85 | 2.67 | 2.53 | 2.39 | 1.91 | 2.9 | 2.57 | 1.13 | 1.61 | 1.63 | 1.66 | 2.36 | 1.97 | 2.93 | 3.67 | 3.27 | 4.47 | 2.74 | 1.22 | 1.34 | 3.7 | 2.95 | 6.65 | 3.68 | 1.9 | 1.19 | 0.99 | 1.35 | 1.42 |
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 ↗DEFRA
Environment and quality of life ratings · Leeds
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Leeds | Isle of Man | Ireland | Netherlands | Belgium | Faroe Islands |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 70% | 78% | 72% | 82% | 64% | 87% |
| particulate matter PM2.5 (µg/m³) | 11 | — | — | — | — | — |
| Pleasure of spending time in the city | 64% | 83% | 78% | 88% | 64% | 100% |
| particulate matter PM10 (µg/m³) | 18 | — | — | — | — | — |
| Air Pollution | 46% | 13% | 24% | 21% | 45% | 0% |
| Garbage Disposal | 61% | 78% | 61% | 79% | 54% | 88% |
| Availability and quality of drinking water | 79% | 88% | 72% | 92% | 70% | 98% |
| Cleanliness and tidiness | 45% | 69% | 52% | 77% | 46% | 94% |
| Noise and Light pollution | 53% | 12% | 37% | 31% | 54% | 21% |
| Water Pollution | 21% | 13% | 37% | 17% | 42% | 7.7% |
Air quality in nearby cities
All cities →United Kingdom↗
Bradford
PM2.56.9
PM1010
µg/m³
PM2.5 · FairNO₂ 14.3O₃ 41
October 23, 202602:00
United Kingdom↗
Sheffield
PM2.56.6
PM108.3
µg/m³
PM2.5 · FairNO₂ 9.3O₃ 51
October 23, 202602:00
United Kingdom↗
Manchester
PM2.54.9
PM106.8
µg/m³
PM2.5 · GoodNO₂ 9.3O₃ 57
October 23, 202602:00
United Kingdom↗
Kingston upon Hull
PM2.53.7
PM106.8
µg/m³
PM2.5 · GoodNO₂ 8.1O₃ 57
October 23, 202602:00
United Kingdom↗
Nottingham
PM2.55
PM106.8
µg/m³
PM2.5 · GoodNO₂ 6.4O₃ 56
October 23, 202602:00
United Kingdom↗
Liverpool
PM2.54.8
PM107.6
µg/m³
PM2.5 · GoodNO₂ 11.4O₃ 57
October 23, 202602:00
South Africa↗
Newcastle upon Tyne
PM2.55.5
PM105.7
µg/m³
PM2.5 · FairNO₂ 9.9O₃ 39
October 23, 202603:00
United Kingdom↗
Stoke-on-Trent
PM2.55
PM105.8
µg/m³
PM2.5 · GoodNO₂ 8.2O₃ 57
October 23, 202602:00
United Kingdom · air quality in other cities
WEATHER & SURROUNDINGS
United Kingdom · weather forecast
Daily maximum and minimum temperatures. Forecast point: 55.3781, -3.436. Forecast for a country reference point; conditions in the city may differ.
Scroll the forecast to see the following days.
United Kingdom · October 20, 2026: minimum temperature 7.2°C, maximum 11.3°C. Wind: 20.2 km/h. Humidity: 98%.
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 | 11.2 | 7.2 | 11.3 | 7.2 | 10.7 | 5.6 | 98 | 100 |
| 2026-10-21 | 10.2 | 6.5 | 11.4 | 6.5 | 2.2 | 7.6 | 93 | 95 |
| 2026-10-22 | 9.3 | 3.6 | 10.3 | 3.6 | 0.4 | 5.5 | 74 | 70 |
| 2026-10-23 | 5.5 | 1.5 | 5.5 | 1.5 | 21.1 | 8.8 | 99 | 100 |
| 2026-10-24 | 5.6 | 0.8 | 9.3 | 5.5 | 28.5 | 10.1 | 100 | 100 |
| 2026-10-25 | 7.2 | 3.8 | 7.2 | 4.6 | 8.3 | 10.6 | 65 | 32 |
| 2026-10-26 | 6.8 | 4.5 | 11.8 | 11.8 | 9.4 | 7 | 91 | 100 |
| 2026-10-27 | 7 | 4.8 | 11.7 | 4.8 | 12.8 | 13 | 97 | 98 |
| 2026-10-28 | 9.9 | 5.5 | 9.9 | 9.7 | 2.5 | 9.3 | 86 | 100 |
| 2026-10-29 | 13 | 9.8 | 13 | 10.6 | 1.1 | 6.3 | 90 | 100 |
| 2026-10-30 | 7.4 | 4.4 | 10.7 | 4.4 | 3.3 | 6.4 | 93 | 100 |
| 2026-10-31 | 8.4 | 3.9 | 8.4 | 7 | 4.9 | 6.8 | 85 | 70 |
| 2026-11-01 | 8.2 | 3.3 | 8.2 | 7.4 | 1.1 | 3.4 | 82 | 31 |
| 2026-11-02 | 9.9 | 4.8 | 9.9 | 5.2 | 0.5 | 1.9 | 73 | 100 |
| 2026-11-03 | 12 | 6.7 | 12 | 6.7 | 0.8 | 2.6 | 75 | 94 |
| 2026-11-04 | 9.7 | 5.7 | 9.7 | 5.7 | 0.6 | 1.3 | 84 | 100 |
| 2026-11-05 | 9 | 5.3 | 9.2 | 5.3 | 0.3 | 2.8 | 99 | 99 |
| 2026-11-06 | 6.6 | 4.2 | 6.6 | 6.6 | — | 3 | 94 | 100 |
UV index by day · United Kingdom
Data for a country reference point. Local conditions may differ.
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.
United Kingdom · October 22, 2026: UV index: 1 .
| 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 | 1 | 0.4 | 0.6 | 2 | 0.2 | 0.9 | 1.1 | 0.8 | 0.8 | 1.4 | 1 | 1.5 | 1.5 | 1.1 | 0.3 | — |
AIR QUALITY QUESTIONS
Leeds · air pollution - questions and answers
What do the latest air quality data show for Leeds?
Leeds - latest available concentrations (October 23, 2026, 02:00 local time): PM2.5: 6.4 µg/m³, PM10: 10 µg/m³, O₃: 46 µg/m³, NO₂: 11.8 µg/m³, SO₂: 2.2 µg/m³, CO: 197 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Leeds over the past week?
The highest available daily mean PM2.5 was 12.3 µg/m³ (October 20, 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 Leeds cover?
Available monthly means cover 2016-02 - 2020-05. The tables include PM2.5, PM10, O₃, NO₂, SO₂. 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 Leeds 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 Leeds?
For October 22, 2026, the forecast UV index is 1. The UV section also shows the following available days. The forecast is for a country reference point (United Kingdom), not the city itself.
What wind speed is forecast for Leeds?
For October 20, 2026, forecast wind speed is 20.2 km/h. The weather table includes wind, temperature and other available parameters for subsequent days. These data describe a country reference point (United Kingdom); local wind may differ.
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.