Worst air pollution Quincy Schoolhouse - Quincy, California, today and tomorrow
Today (20 September): Air quality in Quincy Schoolhouse is poor. AQI and NO2 are poor; O3 is fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (NO2: 75.2/100).
Tomorrow (21 September 2026): Air quality in Quincy Schoolhouse is poor. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (NO2: 74.5/100). Airmine updates local air quality forecasts four times daily.
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In Quincy Schoolhouse, traffic is comparatively light, so nearby farmland dust and seasonal burning shape air quality more than road congestion. Trees and green space nearby provide a partial buffer, catching particulate matter before it spreads further. Daily conditions can shift noticeably depending on wind, temperature, and traffic patterns. This general baseline tends to hold across nearby areas with similar traffic and land use.
Today - 20 September | Pollution peaks at 16:00
AQI:
Poor
75.2/100
PM2.5 (fine particles):
Good
19.3/100
PM10 (coarse particles):
Good
13.3/100
NO2 (nitrogen dioxide):
Poor
75.2/100
O3 (ozone):
Fair
27.7/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
8.8/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 16:00
AQI:
Poor
74.5/100
PM2.5 (fine particles):
Fair
20.6/100
PM10 (coarse particles):
Good
14.0/100
NO2 (nitrogen dioxide):
Poor
74.5/100
O3 (ozone):
Fair
30.0/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
8.8/100
Other Landmarks in Quincy, California
Frequently Asked Questions
Is air quality bad in Quincy Schoolhouse right now?
On 20 September 2026, overall air quality in Quincy Schoolhouse is poor. AQI is the main air quality indicator at 75.2/100. Pollution peaks around 4:00 PM (NO2: 75.2/100).
Will air quality be worse tomorrow in Quincy Schoolhouse?
On 21 September 2026, air quality conditions in Quincy Schoolhouse will be similar to today, with AQI forecast at poor at 74.5/100. Pollution peaks around 4:00 PM (NO2: 74.5/100).
When is air pollution at its worst in Quincy Schoolhouse?
From March to May, average wind speeds run around 8 km/h with temperatures near 8°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 22°C, warm enough for strong sun and heat to drive ground-level ozone formation.
Are air quality levels in Quincy Schoolhouse 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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