Worst air pollution Brookline - Pittsburgh, today and tomorrow
Today (20 September): Air quality in Brookline is moderate. AQI and O3 are moderate; NO2 is fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 48.2/100).
Tomorrow (21 September 2026): Air quality in Brookline is moderate. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 58.2/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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In Brookline, congested streets and dense urban activity keep particulate matter and nitrogen dioxide readings consistently on the higher side. A patch of green space in the area offers some natural buffering against local particulate matter. Actual daily readings vary with weather, time of day, and short-term local activity. The surrounding area tends to follow a similar pattern, with only minor local variation.
Today - 20 September | Pollution peaks at 13:00
AQI:
Moderate
48.2/100
PM2.5 (fine particles):
Good
14.1/100
PM10 (coarse particles):
Good
6.6/100
NO2 (nitrogen dioxide):
Fair
21.2/100
O3 (ozone):
Moderate
48.2/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
3.4/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 12:00
AQI:
Moderate
58.2/100
PM2.5 (fine particles):
Good
11.5/100
PM10 (coarse particles):
Good
6.4/100
NO2 (nitrogen dioxide):
Fair
24.4/100
O3 (ozone):
Moderate
58.2/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
4.4/100
PM1 (ultrafine particles):
Good
2.1/100
Other Landmarks in Pittsburgh
Sports venues in Pittsburgh
Frequently Asked Questions
Is air quality bad in Brookline right now?
On 20 September 2026, overall air quality in Brookline is moderate. AQI is the main air quality indicator at 48.2/100. Pollution peaks around 1:00 PM (O3: 48.2/100).
Will air quality be worse tomorrow in Brookline?
On 21 September 2026, air quality conditions in Brookline will be similar to today, with AQI forecast at moderate at 58.2/100. Pollution peaks around 12:00 PM (O3: 58.2/100).
When is air pollution at its worst in Brookline?
Cold-season conditions typically drive the sharpest particulate increases in dense urban areas like this, as cold, stagnant air traps heating and traffic emissions close to street level through the winter. Summer shifts the concern toward ground-level ozone across the city, with summer's combination of heat, sun, and dense traffic driving some of the year's highest ozone readings.
Are air quality levels in Brookline based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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