Worst air pollution New Rochelle, today and tomorrow
Today (9 August): Air quality in New Rochelle is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 38.1/100).
Tomorrow (10 August 2026): Air quality in New Rochelle is fair. PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 36.1/100). Airmine updates local air quality forecasts four times daily.
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New Rochelle's air quality reflects the Lower Hudson Sound coastal position in Westchester County, with vehicle emissions from I-95 and the New Haven Line commuter rail corridor and the surrounding dense urban residential character contributing local sources. Long Island Sound maritime breezes provide ventilation from the east, while the broader New York metropolitan area's regional ozone and PM2.5 on prevailing southwesterly winds consistently elevates background pollution above the coastal baseline.
Today - 9 August | Pollution peaks at 11:00
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Good
4.4/100
O3 (ozone):
Fair
38.1/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.9/100
PM1 (ultrafine particles):
Good
16.9/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 11:00
AQI:
Fair
36.1/100
PM2.5 (fine particles):
Good
16.5/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Good
4.9/100
O3 (ozone):
Fair
36.1/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.3/100
PM1 (ultrafine particles):
Fair
20.8/100
Pollen forecast in New Rochelle
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Frequently Asked Questions
Is air quality bad in New Rochelle right now?
On 9 August 2026, overall air quality in New Rochelle is fair. AQI is the main air quality indicator at 38.1/100. Pollution peaks around 11:00 AM (O3: 38.1/100).
Will air quality be worse tomorrow in New Rochelle?
On 10 August 2026, air quality conditions in New Rochelle will be similar to today, with AQI forecast at fair at 36.1/100. Pollution peaks around 11:00 AM (O3: 36.1/100).
When is air pollution at its worst in New Rochelle?
Like most US cities, New Rochelle sees air quality shift from season to season. In short, the cleanest conditions typically arrive with the more unsettled weather of spring and autumn, whereas summer heat and regional haze drifting up from the Midwest and South drive ozone spikes. Winter cold fronts tend to clear the air quickly, so extended pollution episodes are relatively uncommon.
Are air quality levels in New Rochelle 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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