Worst air pollution Lewiston, today and tomorrow
Today (16 July): Air quality in Lewiston is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 35.5/100).
Tomorrow (17 July 2026): Air quality in Lewiston is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 7:00 AM (O3: 30.1/100). 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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Air quality in Lewiston is driven mostly by cool Maine air masses — clean northerly winds usually keep air quality favorable. Overall, Lewiston sees air quality that tracks fairly closely with typical conditions for its wider region. Local topography and prevailing winds both play a role in how quickly conditions change.
Today - 16 July | Pollution peaks at 10:00
AQI:
Fair
35.5/100
PM2.5 (fine particles):
Good
15.3/100
PM10 (coarse particles):
Good
9.0/100
NO2 (nitrogen dioxide):
Good
19.9/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
3.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
12.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 07:00
AQI:
Fair
30.1/100
PM2.5 (fine particles):
Good
12.2/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Fair
20.9/100
O3 (ozone):
Fair
30.1/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.6/100
PM1 (ultrafine particles):
Good
10.1/100
Pollen forecast in Lewiston
View pollen forecastFrequently Asked Questions
Is air quality bad in Lewiston right now?
On 16 July 2026, overall air quality in Lewiston is fair. AQI is the main air quality indicator at 35.5/100. Pollution peaks around 10:00 AM (O3: 35.5/100).
Will air quality be worse tomorrow in Lewiston?
On 17 July 2026, air quality conditions in Lewiston will be similar to today, with AQI forecast at fair at 30.1/100. Pollution peaks around 7:00 AM (O3: 30.1/100).
When is air pollution at its worst in Lewiston?
Lewiston experiences a distinct seasonal swing in air quality, as frequent frontal systems in spring and fall usually keep the air cleanest then; by contrast, the combination of local heat and imported regional haze peaks during summer. Winter cold fronts tend to clear the air quickly, so extended pollution episodes are relatively uncommon.
Are air quality levels in Lewiston 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app