Worst air pollution Mammoth Lakes, today and tomorrow
Today (20 September): Air quality in Mammoth Lakes is poor. AQI and O3 are poor; PM2.5 and PM10 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 62.4/100).
Tomorrow (21 September 2026): Air quality in Mammoth Lakes is poor. All pollutants stay as today. Pollution peaks around 1:00 AM (O3: 63.2/100). 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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In Mammoth Lakes, high-altitude Sierra air is the main influence on air quality, and wildfire smoke from the Sierra foothills can degrade summer air quality. Most days bring generally favorable conditions here, with occasional exceptions tied to shifting weather patterns. Visitors and residents alike tend to notice the clearest air outside the warmest summer weeks.
Today - 20 September | Pollution peaks at 23:00
AQI:
Poor
62.4/100
PM2.5 (fine particles):
Fair
35.8/100
PM10 (coarse particles):
Fair
20.3/100
NO2 (nitrogen dioxide):
Good
4.3/100
O3 (ozone):
Poor
62.4/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
7.4/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 01:00
AQI:
Poor
63.2/100
PM2.5 (fine particles):
Fair
37.8/100
PM10 (coarse particles):
Fair
21.0/100
NO2 (nitrogen dioxide):
Good
1.9/100
O3 (ozone):
Poor
63.2/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
7.0/100
Pollen forecast in Mammoth Lakes
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Mammoth Lakes
Frequently Asked Questions
Is air quality bad in Mammoth Lakes right now?
On 20 September 2026, overall air quality in Mammoth Lakes is poor. AQI is the main air quality indicator at 62.4/100. Pollution peaks around 11:00 PM (O3: 62.4/100).
Will air quality be worse tomorrow in Mammoth Lakes?
On 21 September 2026, air quality conditions in Mammoth Lakes will be similar to today, with AQI forecast at poor at 63.2/100. Pollution peaks around 1:00 AM (O3: 63.2/100).
When is air pollution at its worst in Mammoth Lakes?
Air quality in Mammoth Lakes shifts across the year: winter rains provide the only real relief from an otherwise persistent haze, but summer and early autumn bring the highest ozone levels, and wildfire smoke can spike particulate readings sharply from August through October. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Mammoth Lakes 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: 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.
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