Fine particles
8µg/m³CAMS model • Open-Meteo
United StatesAir quality, PM2.5 and PM10
Compare air quality across cities in this country. Explore PM2.5, PM10 and other pollutant concentrations, check data timestamps, and view recent trends and historical charts.
United States - average concentrations across available points: PM2.5: 8 µg/m³, PM10: 9.5 µg/m³, O₃: 80.6 µg/m³, NO₂: 11.7 µg/m³, SO₂: 1.8 µg/m³, CO: 180 µg/m³. Date range: September 25, 2026. Each point contributes its latest available hourly value; this is not a daily or population-weighted average.
Lowest PM2.5: Baltimore (2.5 µg/m³). Highest PM2.5: Detroit (13.8 µg/m³). This comparison covers 20 cities on September 25, 2026 using their latest available hourly values. Reading times may differ; this is not an annual-average ranking.
Air quality questions →
5 weather warnings in effect for United States
All cities · United States
20 citiesUnited States↗
New York City
PM2.56.2
PM106.3
µg/m³
PM2.5 · FairNO₂ 10.8O₃ 70
September 25, 202621:00
United States↗
Los Angeles
PM2.513.4
PM1017
µg/m³
PM2.5 · FairNO₂ 8.9O₃ 103
September 25, 202618:00
United States↗
Chicago
PM2.58.4
PM108.4
µg/m³
PM2.5 · FairNO₂ 26.1O₃ 66
September 25, 202620:00
United States↗
Houston
PM2.511.6
PM1011.7
µg/m³
PM2.5 · FairNO₂ 12.7O₃ 93
September 25, 202620:00
United States↗
Philadelphia
PM2.56.3
PM106.4
µg/m³
PM2.5 · FairNO₂ 8.8O₃ 73
September 25, 202621:00
United States↗
Phoenix
PM2.512
PM1027
µg/m³
PM2.5 · FairNO₂ 5.2O₃ 114
September 25, 202618:00
United States↗
Bronx
PM2.56.2
PM106.3
µg/m³
PM2.5 · FairNO₂ 10.8O₃ 70
September 25, 202621:00
United States↗
San Antonio
PM2.56.7
PM107
µg/m³
PM2.5 · FairNO₂ 7.1O₃ 108
September 25, 202620:00
United States↗
Dallas
PM2.57.3
PM107.4
µg/m³
PM2.5 · FairNO₂ 9.9O₃ 106
September 25, 202620:00
United States↗
San Jose
PM2.55.6
PM108.2
µg/m³
PM2.5 · FairNO₂ 3.4O₃ 75
September 25, 202618:00
United States↗
Indianapolis
PM2.54.6
PM104.6
µg/m³
PM2.5 · GoodNO₂ 12.7O₃ 57
September 25, 202621:00
United States↗
Jacksonville
PM2.59.5
PM1011.4
µg/m³
PM2.5 · FairNO₂ 10.1O₃ 81
September 25, 202621:00
United States↗
San Francisco
PM2.57
PM1010.8
µg/m³
PM2.5 · FairNO₂ 7.8O₃ 63
September 25, 202618:00
United States↗
Austin
PM2.56.2
PM106.2
µg/m³
PM2.5 · FairNO₂ 5O₃ 108
September 25, 202620:00
United States↗
Columbus
PM2.58.4
PM108.4
µg/m³
PM2.5 · FairNO₂ 11.4O₃ 61
September 25, 202621:00
United States↗
Fort Worth
PM2.59.5
PM109.5
µg/m³
PM2.5 · FairNO₂ 10O₃ 136
September 25, 202620:00
United States↗
Charlotte
PM2.58.6
PM108.7
µg/m³
PM2.5 · FairNO₂ 17.9O₃ 44
September 25, 202621:00
United States↗
Detroit
PM2.513.8
PM1013.9
µg/m³
PM2.5 · FairNO₂ 40.3O₃ 36
September 25, 202621:00
United States↗
Memphis
PM2.57.1
PM107.4
µg/m³
PM2.5 · FairNO₂ 6.1O₃ 82
September 25, 202620:00
United States↗
Baltimore
PM2.52.5
PM102.6
µg/m³
PM2.5 · GoodNO₂ 8.9O₃ 65
September 25, 202621:00
PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
AVERAGE ACROSS AVAILABLE COUNTRY POINTS
Latest concentrations · United States
Particulate matter
9.5µg/m³Ozone
80.6µg/m³Nitrogen dioxide
11.7µg/m³Sulphur dioxide
1.8µg/m³Carbon monoxide
180µg/m³Average of the latest available hour at each model point. This is neither a population-weighted nor a daily average.
DAILY DATA · United States
United States - air pollution over recent days (2026-08-30 - 2026-09-24)
Averages across available points in the country. These are not population-weighted averages.
PM2.5Lowest 9.09 2026-09-21Highest 12.95 2026-09-012026-08-30 - 2026-09-24
PM10Lowest 11.8 2026-09-19Highest 15.46 2026-09-012026-08-30 - 2026-09-24
O₃Lowest 63.46 2026-09-22Highest 78.51 2026-08-312026-08-30 - 2026-09-24
NO₂Lowest 10.41 2026-09-21Highest 13.94 2026-09-042026-08-30 - 2026-09-24
SO₂Lowest 1.73 2026-09-06Highest 2.08 2026-09-012026-08-30 - 2026-09-24
COLowest 154.45 2026-09-06Highest 177.96 2026-09-182026-08-30 - 2026-09-24
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-24 | 2026-09-23 | 2026-09-22 | 2026-09-21 | 2026-09-20 | 2026-09-19 | 2026-09-18 | 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 | 10.87 | 9.58 | 9.67 | 9.09 | 10.61 | 9.79 | 10.69 | 10.52 | 11.07 | 11.22 | 10.8 | 11.38 | 12.95 | 11.47 | 10.33 |
| PM10 | 12.47 | 12.42 | 12.79 | 11.95 | 13.36 | 11.8 | 12.6 | 13.22 | 14.08 | 14.8 | 13.49 | 14.19 | 15.46 | 13.72 | 12.64 |
| O₃ | 70.31 | 68.21 | 63.46 | 67.86 | 70.85 | 72.35 | 75.61 | 65.13 | 67.03 | 69.81 | 72.27 | 73.56 | 78.21 | 78.51 | 73.56 |
| NO₂ | 12.93 | 10.9 | 11.28 | 10.41 | 11.89 | 11.73 | 13 | 12.26 | 13.09 | 13.94 | 13.1 | 12.96 | 13.67 | 12.1 | 12.68 |
| SO₂ | 1.98 | 1.79 | 1.79 | 1.73 | 1.74 | 1.85 | 1.83 | 1.73 | 1.82 | 1.99 | 1.99 | 2.06 | 2.08 | 2 | 1.81 |
| CO | 173.42 | 167.16 | 171.69 | 167.03 | 158.1 | 167.12 | 177.96 | 154.45 | 161.19 | 170.3 | 165.08 | 162.7 | 170.4 | 166.8 | 162.41 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · United States
United States - air pollution history (2015-10 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 4.49 2020-05Highest 12.9 2016-012015-10 - 2020-05
PM10Lowest 10.6 2019-02Highest 24.9 2018-082015-10 - 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 | 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 | 2016-01 | 2015-12 | 2015-11 | 2015-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 4.49 | 5.13 | 5.62 | 5.94 | 5.92 | 6.98 | 7.2 | 5.42 | 5.79 | 6.37 | 6.94 | 5.69 | 5.42 | 5.14 | 6.45 | 6.49 | 6.64 | 6.61 | 6.35 | 5.64 | 5.65 | 10.6 | 7.93 | 6.29 | 6.3 | 5.62 | 5.3 | 6.1 | 7.28 | 7.71 | 7.15 | 6.07 | 8.25 | 8.35 | 7.52 | 6.27 | 5.8 | 5.45 | 6.21 | 6.8 | 6.89 | 6.58 | 7.34 | 6.21 | 6.19 | 6.78 | 6.99 | 6.61 | 6.03 | 6.2 | 6.1 | 11.1 | 12.9 | 10.4 | 11.3 | 11.3 |
| PM10 | 14.8 | 13.6 | 11.8 | 12.8 | 11.8 | 12.1 | 16.1 | 15.7 | 17 | 17 | 18.9 | 17.2 | 14.6 | 14.2 | 13.3 | 10.6 | 12 | 12.4 | 13.8 | 13.8 | 18.1 | 24.9 | 20.6 | 18.9 | 16.8 | 15 | 12.3 | 12.5 | 14 | 15.5 | 16 | 18 | 22.4 | 19.5 | 21.6 | 18.6 | 17.3 | 14.3 | 14.9 | 14.2 | 12.1 | 13.4 | 17.1 | 16.2 | 16.9 | 19 | 18.6 | 18.3 | 15.2 | 15.7 | 15.7 | 20.8 | 18.7 | 20.7 | 17.3 | 12.6 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
Environment and quality of life ratings · United States
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | United States | Canada | The Bahamas | Venezuela | Belize | Cuba |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 70% | 77% | 50% | 41% | 52% | 53% |
| Pleasure of spending time in the city | 75% | 79% | 53% | 41% | 60% | 44% |
| Air Pollution | 29% | 24% | 52% | 59% | 43% | 62% |
| Garbage Disposal | 71% | 74% | 29% | 18% | 30% | 30% |
| Availability and quality of drinking water | 71% | 82% | 55% | 28% | 62% | 44% |
| Cleanliness and tidiness | 60% | 66% | 35% | 22% | 38% | 35% |
| Noise and Light pollution | 47% | 42% | 39% | 47% | 45% | 47% |
| Water Pollution | 44% | 35% | 58% | 76% | 64% | 61% |
WEATHER & SURROUNDINGS
United States · weather forecast
Daily maximum and minimum temperatures. Forecast point: 38.0902, -94.7129.
Scroll the forecast to see the following days.
United States · September 23, 2026: minimum temperature 16°C, maximum 25°C. Wind: 14.6 km/h. Humidity: 63%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-23 | 24.2 | 16 | 25 | 19.3 | 0.8 | 4.1 | 63 | 27 |
| 2026-09-24 | 24 | 13.8 | 25.2 | 19.9 | 2.8 | 4.6 | 57 | 79 |
| 2026-09-25 | 24.5 | 14.9 | 24.7 | 17.5 | 7.7 | 4.2 | 68 | 100 |
| 2026-09-26 | 28 | 17.4 | 28 | 20.7 | 1.6 | 5.4 | 56 | 99 |
| 2026-09-27 | 26.1 | 18.7 | 26.1 | 20.2 | 7.2 | 4.5 | 61 | 100 |
| 2026-09-28 | 25.8 | 18.8 | 27.6 | 22.3 | 1 | 3.5 | 62 | 38 |
| 2026-09-29 | 29.3 | 20 | 29.9 | 22.2 | 3.7 | 5.1 | 56 | 21 |
| 2026-09-30 | 22.8 | 20.9 | 30.1 | 27.2 | 29.1 | 8 | 88 | 100 |
| 2026-10-01 | 29.9 | 21.9 | 29.9 | 22.5 | 7.8 | 9.8 | 45 | 67 |
| 2026-10-02 | 19.8 | 17.9 | 21.3 | 19.6 | — | 5.7 | 74 | 100 |
| 2026-10-03 | 25.3 | 18.5 | 27.8 | 19.5 | 1.9 | 3.4 | 50 | 87 |
| 2026-10-04 | 18.2 | 9.8 | 21.3 | 10.3 | 5.3 | 9 | 62 | 66 |
| 2026-10-05 | 13.3 | 5 | 14.5 | 8.6 | 11.1 | 6.1 | 40 | 68 |
| 2026-10-06 | 17 | 6.1 | 19 | 9.9 | 6.2 | 4.2 | 33 | 100 |
| 2026-10-07 | 20.9 | 7.3 | 23.6 | 15.2 | 0.2 | 7.1 | 35 | 96 |
| 2026-10-08 | 20.6 | 9 | 22.2 | 14.1 | — | 4 | 37 | 3 |
| 2026-10-09 | 26.6 | 11.6 | 28.5 | 17.8 | — | 5.3 | 34 | 4 |
UV index by day · United States
Data for a country reference point. Local conditions may differ.
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.
United States · September 25, 2026: UV index: 5 .
| Indicator | 2026-09-25 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 5 | 4.5 | 5.9 | 5.7 | 1.4 | 4.5 | 4.8 | 3.3 | 5.3 | 3.5 | 4.2 | 5.1 | 5.2 | 5.2 | 5.1 | — |
AIR QUALITY QUESTIONS
United States · air pollution - questions and answers
What do the latest air quality data show for United States?
United States - average concentrations across available points: PM2.5: 8 µg/m³, PM10: 9.5 µg/m³, O₃: 80.6 µg/m³, NO₂: 11.7 µg/m³, SO₂: 1.8 µg/m³, CO: 180 µg/m³. Date range: September 25, 2026. Each point contributes its latest available hourly value; this is not a daily or population-weighted average.
When was PM2.5 highest in United States over the past week?
The highest available daily mean PM2.5 was 10.9 µg/m³ (September 24, 2026). This comparison covers 7 days with data in the seven days before September 25, 2026. The day of the latest reading is excluded because it may be incomplete.
Which cities in United States have the cleanest and most polluted air by PM2.5?
Lowest PM2.5: Baltimore (2.5 µg/m³). Highest PM2.5: Detroit (13.8 µg/m³). This comparison covers 20 cities on September 25, 2026 using their latest available hourly values. Reading times may differ; this is not an annual-average ranking.
What period does the pollution history for United States cover?
Available monthly means cover 2015-10 - 2020-05. The tables include PM2.5, PM10. 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 United States 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 United States?
For September 25, 2026, the forecast UV index is 5. The UV section also shows the following available days.
What wind speed is forecast for United States?
For September 23, 2026, forecast wind speed is 14.6 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.