Worst air pollution Maui, today and tomorrow
Today (19 September): Air quality in Maui is poor. AQI and PM10 are poor; PM2.5 is moderate; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 AM (PM10: 74.1/100).
Tomorrow (20 September 2026): Air quality in Maui is very poor. AQI worsens to very poor; PM2.5 increases to very poor; PM10 increases to very poor; all other pollutants stay as today. Pollution peaks around 11:00 AM (PM2.5: 100/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Maui's Road to Hana air quality benefits from its exceptional Hawaiian North Shore Pacific coastal position, with consistent northeast Pacific trade winds providing outstanding maritime ventilation along the 52-mile scenic highway. Vehicle traffic on Hana Highway contributes modest local sources, while the extraordinary lush tropical rainforest provides exceptional natural filtration and the Hawaiian trade wind exposure generally maintains excellent to good conditions along most of this spectacular coastal route.
Today - 19 September | Pollution peaks at 05:00
AQI:
Poor
74.1/100
PM2.5 (fine particles):
Moderate
40.3/100
PM10 (coarse particles):
Poor
74.1/100
NO2 (nitrogen dioxide):
Good
0.6/100
O3 (ozone):
Good
15.0/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
3.8/100
Levels show the poorest local air quality during the day
Tomorrow - 20 September | Pollution peaks at 11:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Very poor
100/100
PM10 (coarse particles):
Very poor
100/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Good
14.6/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
15.2/100
Frequently Asked Questions
Is air quality bad in Maui right now?
On 19 September 2026, overall air quality in Maui is poor. AQI is the main air quality indicator at 74.1/100. Pollution peaks around 5:00 AM (PM10: 74.1/100).
Will air quality be worse tomorrow in Maui?
On 20 September 2026, air quality conditions in Maui will be worse than today, with AQI forecast at very poor at 100/100. Pollution peaks around 11:00 AM (PM2.5: 100/100).
When is air pollution at its worst in Maui?
This landmark in Maui sees air quality shift through the year. In short, the cleanest stretches usually come in spring and fall, between the summer ozone season and the calmer winter pollution episodes, whereas summer heat waves are the main driver of poor air quality, as ozone builds under stagnant, humid conditions. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Maui 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
Get the full experience in the Airmine app.