Worst air pollution Lima, today and tomorrow
Today (9 August): Air quality in Lima is fair. AQI, PM2.5, NO2, O3, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 11:00 AM (O3: 38.1/100).
Tomorrow (10 August 2026): Air quality in Lima is fair. All 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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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Lima's air quality in Ohio reflects the Great Miami River valley position in western Ohio, with vehicle emissions from I-75 and the surrounding petroleum refining — Lima hosting a major Husky Energy refinery — and manufacturing industry generating elevated industrial PM2.5 alongside primary vehicle sources. The flat Ohio plain provides generally good wind dispersal, while summer regional ozone from the Ohio Valley industrial airshed and the refinery complex's industrial emissions are the primary air quality concerns.
Today - 9 August | Pollution peaks at 11:00
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Fair
20.1/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Fair
28.3/100
O3 (ozone):
Fair
38.1/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.9/100
PM1 (ultrafine particles):
Fair
25.0/100
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):
Fair
25.6/100
PM10 (coarse particles):
Good
9.0/100
NO2 (nitrogen dioxide):
Fair
30.9/100
O3 (ozone):
Fair
36.1/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.3/100
PM1 (ultrafine particles):
Fair
29.9/100
Pollen forecast in Lima
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Frequently Asked Questions
Is air quality bad in Lima right now?
On 9 August 2026, overall air quality in Lima 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 Lima?
On 10 August 2026, air quality conditions in Lima 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 Lima?
Like most US cities, Lima sees air quality shift from season to season. In short, spring and autumn tend to bring the cleanest, most stable air, whereas prolonged summer heat waves are when air quality most often dips into unhealthy territory. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Lima 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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