Worst air pollution Charles River Esplanade - Boston, today and tomorrow
Today (9 August): Air quality in Charles River Esplanade is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 34.0/100).
Tomorrow (10 August 2026): Air quality in Charles River Esplanade is fair. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 33.4/100). Airmine updates local air quality forecasts four times daily.
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Boston's Charles River Esplanade records good air quality along the Cambridge side of the Charles River basin, with consistent river breezes providing ventilation and the open water fetch diluting traffic emissions from Storrow Drive and Memorial Drive on both banks. The Esplanade is one of Boston's more reliably clean-air recreational corridors.
Today - 9 August | Pollution peaks at 08:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
6.9/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Good
6.5/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Good
5.4/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 13:00
AQI:
Fair
33.4/100
PM2.5 (fine particles):
Good
8.6/100
PM10 (coarse particles):
Good
5.0/100
NO2 (nitrogen dioxide):
Good
11.0/100
O3 (ozone):
Fair
33.4/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.5/100
PM1 (ultrafine particles):
Good
5.6/100
Other Landmarks in Boston
Sports venues in Boston
Frequently Asked Questions
Is air quality bad in Charles River Esplanade right now?
On 9 August 2026, overall air quality in Charles River Esplanade is fair. AQI is the main air quality indicator at 34.0/100. Pollution peaks around 8:00 AM (O3: 34.0/100).
Will air quality be worse tomorrow in Charles River Esplanade?
On 10 August 2026, air quality conditions in Charles River Esplanade will be similar to today, with AQI forecast at fair at 33.4/100. Pollution peaks around 1:00 PM (O3: 33.4/100).
When is air pollution at its worst in Charles River Esplanade?
Seasonal changes shape air quality at Charles River Esplanade much as they do across Boston, as the shoulder seasons bring the most consistently clean air of the year; by contrast, summer heat and regional haze drifting up from the Midwest and South drive ozone spikes. Coastal sea breezes can offer some relief from inland summer ozone buildup.
Are air quality levels in Charles River Esplanade 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: 9 August 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.
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