Worst air pollution Mariemont - Cincinnati, today and tomorrow
Today (16 July): Air quality in Mariemont is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 35.2/100).
Tomorrow (17 July 2026): Air quality in Mariemont is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 39.5/100). 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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Cincinnati's Mariemont records excellent suburban air quality in this planned garden suburb on the eastern side, with low traffic density, substantial tree canopy, and distance from the Ohio River industrial corridor keeping readings consistently among the lowest in greater Cincinnati. This is one of the metro area's cleanest residential communities throughout the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
35.2/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
8.4/100
NO2 (nitrogen dioxide):
Good
8.8/100
O3 (ozone):
Fair
35.2/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
8.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
39.5/100
PM2.5 (fine particles):
Good
15.7/100
PM10 (coarse particles):
Good
10.0/100
NO2 (nitrogen dioxide):
Good
8.5/100
O3 (ozone):
Fair
39.5/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
10.1/100
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Frequently Asked Questions
Is air quality bad in Mariemont right now?
On 16 July 2026, overall air quality in Mariemont is fair. AQI is the main air quality indicator at 35.2/100. Pollution peaks around 1:00 PM (O3: 35.2/100).
Will air quality be worse tomorrow in Mariemont?
On 17 July 2026, air quality conditions in Mariemont will be similar to today, with AQI forecast at fair at 39.5/100. Pollution peaks around 12:00 PM (O3: 39.5/100).
When is air pollution at its worst in Mariemont?
Mariemont follows Cincinnati's typical seasonal air quality pattern, as between summer ozone and occasional winter inversions, spring and fall are the year's cleanest stretch; by contrast, prolonged summer heat waves are when air quality most often dips into unhealthy territory. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in Mariemont 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