Worst air pollution Obsidian Flat Group Campground - Mammoth Lakes, today and tomorrow
Today (20 September): Air quality in Obsidian Flat Group Campground is poor. AQI and O3 are poor; PM2.5 is moderate; PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 74.4/100).
Tomorrow (21 September 2026): Air quality in Obsidian Flat Group Campground is poor. PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 AM (O3: 75.8/100). 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 Obsidian Flat Group Campground, with fewer vehicles on the road, nearby cropland dust and periodic burning outweigh traffic as a pollution source. Vegetation nearby provides a modest natural filter for airborne particulates. This general baseline tends to hold across nearby areas with similar traffic and land use. Actual air quality on a given day still depends heavily on local wind and weather conditions.
Today - 20 September | Pollution peaks at 23:00
AQI:
Poor
74.4/100
PM2.5 (fine particles):
Moderate
42.1/100
PM10 (coarse particles):
Good
19.4/100
NO2 (nitrogen dioxide):
Good
2.0/100
O3 (ozone):
Poor
74.4/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
8.0/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 01:00
AQI:
Poor
75.8/100
PM2.5 (fine particles):
Moderate
44.5/100
PM10 (coarse particles):
Fair
21.9/100
NO2 (nitrogen dioxide):
Good
1.5/100
O3 (ozone):
Poor
75.8/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
9.1/100
Other Landmarks in Mammoth Lakes
Frequently Asked Questions
Is air quality bad in Obsidian Flat Group Campground right now?
On 20 September 2026, overall air quality in Obsidian Flat Group Campground is poor. AQI is the main air quality indicator at 74.4/100. Pollution peaks around 11:00 PM (O3: 74.4/100).
Will air quality be worse tomorrow in Obsidian Flat Group Campground?
On 21 September 2026, air quality conditions in Obsidian Flat Group Campground will be similar to today, with AQI forecast at poor at 75.8/100. Pollution peaks around 1:00 AM (O3: 75.8/100).
When is air pollution at its worst in Obsidian Flat Group Campground?
From October to December, average wind speeds run around 10 km/h with temperatures near 1°C, calm and cool enough to let particulate matter and smoke build up near the ground rather than disperse. From June to August, temperatures average around 16°C, warm enough for strong sun and heat to drive ground-level ozone formation.
Are air quality levels in Obsidian Flat Group Campground 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 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.
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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