Worst air pollution Manoa Valley - Honolulu, today and tomorrow
Today (15 July): Air quality in Manoa Valley is poor. AQI and PM10 are poor; O3 is fair; PM2.5 is medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (PM10: 68.3/100).
Tomorrow (16 July 2026): Air quality in Manoa Valley is poor. All pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 65.2/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Honolulu's Manoa Valley air quality reflects the historic residential valley at the Koolau Range base, with vehicle traffic on the surrounding East Manoa Road corridor and the University of Hawaii campus contributing local sources. The Manoa Valley's topographic enclosure creates occasional concentration under calm conditions, while the trade winds provide background ventilation and the valley's lush rainforest character provides natural filtration throughout most of the year.
Today - 15 July | Pollution peaks at 21:00
AQI:
Poor
68.3/100
PM2.5 (fine particles):
Medium
49.0/100
PM10 (coarse particles):
Poor
68.3/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
23.3/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
9.0/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 00:00
AQI:
Poor
65.2/100
PM2.5 (fine particles):
Medium
48.0/100
PM10 (coarse particles):
Poor
65.2/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
23.3/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
8.3/100
Other Landmarks in Honolulu
Frequently Asked Questions
Is air quality bad in Manoa Valley right now?
On 15 July 2026, overall air quality in Manoa Valley is poor. AQI is the main air quality indicator at 68.3/100. Pollution peaks around 9:00 PM (PM10: 68.3/100).
Will air quality be worse tomorrow in Manoa Valley?
On 16 July 2026, air quality conditions in Manoa Valley will be similar to today, with AQI forecast at poor at 65.2/100. Pollution peaks around 12:00 AM (PM10: 65.2/100).
When is air pollution at its worst in Manoa Valley?
Manoa Valley's air quality follows a clear seasonal pattern, as between summer ozone and occasional winter inversions, spring and fall are the year's cleanest stretch; by contrast, hot, humid summer conditions drive ozone formation, especially during heat waves. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Manoa Valley 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