Worst air pollution Lemon Grove Big Lemon - Lemon Grove, today and tomorrow
Today (20 September): Air quality in Lemon Grove Big Lemon is moderate. AQI and PM10 are moderate; PM2.5 and NO2 are fair; O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (PM10: 50.1/100).
Tomorrow (21 September 2026): Air quality in Lemon Grove Big Lemon is moderate. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 9:00 AM (PM10: 42.6/100). 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 Lemon Grove Big Lemon, with traffic fairly sparse here, dust kicked up from nearby farmland tends to matter more than vehicle emissions. This is partly offset by nearby tree cover, which filters out some particulate matter naturally. Conditions on any given day depend heavily on wind speed and direction locally.
Today - 20 September | Pollution peaks at 10:00
AQI:
Moderate
50.1/100
PM2.5 (fine particles):
Fair
35.2/100
PM10 (coarse particles):
Moderate
50.1/100
NO2 (nitrogen dioxide):
Fair
21.5/100
O3 (ozone):
Good
12.4/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
9.7/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 09:00
AQI:
Moderate
42.6/100
PM2.5 (fine particles):
Fair
31.8/100
PM10 (coarse particles):
Moderate
42.6/100
NO2 (nitrogen dioxide):
Good
10.8/100
O3 (ozone):
Good
13.8/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
14.6/100
Other Landmarks in Lemon Grove
Frequently Asked Questions
Is air quality bad in Lemon Grove Big Lemon right now?
On 20 September 2026, overall air quality in Lemon Grove Big Lemon is moderate. AQI is the main air quality indicator at 50.1/100. Pollution peaks around 10:00 AM (PM10: 50.1/100).
Will air quality be worse tomorrow in Lemon Grove Big Lemon?
On 21 September 2026, air quality conditions in Lemon Grove Big Lemon will be similar to today, with AQI forecast at moderate at 42.6/100. Pollution peaks around 9:00 AM (PM10: 42.6/100).
When is air pollution at its worst in Lemon Grove Big Lemon?
From November to January, average wind speeds run around 11 km/h with temperatures near 14°C, calm and cool enough to let particulate matter and smoke build up near the ground rather than disperse. From July to September, temperatures average around 23°C, warm enough for strong sun and heat to drive ground-level ozone formation.
Are air quality levels in Lemon Grove Big Lemon 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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