Worst air pollution Mariposa, today and tomorrow
Today (15 July): Air quality in Mariposa is fair. AQI, PM2.5, NO2, and O3 are fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 39.4/100).
Tomorrow (16 July 2026): Air quality in Mariposa is fair. AQI improves to medium; NO2 decreases to medium; O3 decreases to medium; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 41.0/100). 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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Mariposa experiences air quality conditions shaped chiefly by Sierra foothill wildfire smoke, and wildfire smoke in dry summers is the leading regional concern. Day-to-day conditions in Mariposa can still vary with local weather, wind direction, and time of year. Visitors and residents alike tend to notice the clearest air outside the warmest summer weeks.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
39.4/100
PM2.5 (fine particles):
Fair
22.7/100
PM10 (coarse particles):
Good
14.2/100
NO2 (nitrogen dioxide):
Fair
22.1/100
O3 (ozone):
Fair
39.4/100
SO2 (sulfur dioxide):
Good
9.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
12.7/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 10:00
AQI:
Medium
41.0/100
PM2.5 (fine particles):
Fair
30.6/100
PM10 (coarse particles):
Good
15.6/100
NO2 (nitrogen dioxide):
Medium
40.6/100
O3 (ozone):
Medium
41.0/100
SO2 (sulfur dioxide):
Good
9.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Fair
20.8/100
Pollen forecast in Mariposa
View pollen forecastFrequently Asked Questions
Is air quality bad in Mariposa right now?
On 15 July 2026, overall air quality in Mariposa is fair. AQI is the main air quality indicator at 39.4/100. Pollution peaks around 8:00 AM (O3: 39.4/100).
Will air quality be worse tomorrow in Mariposa?
On 16 July 2026, air quality conditions in Mariposa will be similar to today, with PM2.5 forecast at fair at 30.6/100. Pollution peaks around 10:00 AM (O3: 41.0/100).
When is air pollution at its worst in Mariposa?
Conditions in Mariposa vary noticeably across the seasons: winter rains provide the only real relief from an otherwise persistent haze, but summer sunshine and heat drive some of the worst ozone readings in the country. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Mariposa 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