Worst air pollution Mendocino, today and tomorrow
Today (15 July): Air quality in Mendocino is fair. PM2.5 is fair; AQI, NO2, and O3 are medium; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 PM (NO2: 53.5/100).
Tomorrow (16 July 2026): Air quality in Mendocino is fair. O3 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 PM (NO2: 52.5/100). 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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Mendocino's air quality is shaped largely by cool coastal fog; marine fog and onshore breeze keep pollutant levels low year-round. These factors combine to give Mendocino a fairly typical seasonal air quality pattern for this part of the country. Visitors and residents alike tend to notice the clearest air outside the warmest summer weeks.
Today - 15 July | Pollution peaks at 22:00
AQI:
Medium
53.5/100
PM2.5 (fine particles):
Fair
22.5/100
PM10 (coarse particles):
Good
10.5/100
NO2 (nitrogen dioxide):
Medium
53.5/100
O3 (ozone):
Medium
44.1/100
SO2 (sulfur dioxide):
Good
11.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
14.7/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 22:00
AQI:
Medium
52.5/100
PM2.5 (fine particles):
Fair
28.9/100
PM10 (coarse particles):
Good
20.0/100
NO2 (nitrogen dioxide):
Medium
52.5/100
O3 (ozone):
Fair
35.2/100
SO2 (sulfur dioxide):
Good
14.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Fair
20.6/100
Pollen forecast in Mendocino
View pollen forecastFrequently Asked Questions
Is air quality bad in Mendocino right now?
On 15 July 2026, overall air quality in Mendocino is fair. PM2.5 is the main pollutant at 22.5/100. Pollution peaks around 10:00 PM (NO2: 53.5/100).
Will air quality be worse tomorrow in Mendocino?
On 16 July 2026, air quality conditions in Mendocino will be similar to today, with O3 forecast at fair at 35.2/100. Pollution peaks around 10:00 PM (NO2: 52.5/100).
When is air pollution at its worst in Mendocino?
Seasonal changes shape air quality across Mendocino: winter typically brings the cleanest stretch, once occasional rain clears the basin, but hot, sunny summer conditions drive persistent ozone problems, compounded by wildfire smoke risk into early autumn. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Mendocino 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