Worst air pollution Milnerton - Cape Town, today and tomorrow
Today (20 September): Air quality in Milnerton is very poor. AQI and PM1 are very poor; PM2.5 is poor; PM10 and SO2 are moderate; O3 and HCHO are fair; NO2 and CO are good. Pollution peaks around 12:00 PM (PM1: 96.2/100).
Tomorrow (21 September 2026): Air quality in Milnerton is very poor. PM2.5 decreases to moderate; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (PM1: 82.4/100). Airmine updates local air quality forecasts four times daily.
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Milnerton lies roughly 10 km northeast of Cape Town. Milnerton's exposed Cape position means strong, regular winds usually keep air quality favourable, with vehicle traffic and the city bowl, harbour, and southern suburbs contributing modest local emissions. Only on rare still days, typically in winter, does pollution build up noticeably before dispersing again. It's a fairly standard picture for this part of the Western Cape.
Today - 20 September | Pollution peaks at 12:00
AQI:
Very poor
96.2/100
PM2.5 (fine particles):
Poor
66.1/100
PM10 (coarse particles):
Moderate
47.8/100
NO2 (nitrogen dioxide):
Good
19.7/100
O3 (ozone):
Fair
38.7/100
SO2 (sulfur dioxide):
Moderate
41.6/100
CO (carbon monoxide):
Good
2.2/100
HCHO (formaldehyde):
Fair
31.0/100
PM1 (ultrafine particles):
Very poor
96.2/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 23:00
AQI:
Very poor
82.4/100
PM2.5 (fine particles):
Moderate
53.5/100
PM10 (coarse particles):
Moderate
40.0/100
NO2 (nitrogen dioxide):
Fair
36.2/100
O3 (ozone):
Fair
20.1/100
SO2 (sulfur dioxide):
Moderate
40.5/100
CO (carbon monoxide):
Good
2.5/100
HCHO (formaldehyde):
Fair
30.6/100
PM1 (ultrafine particles):
Very poor
82.4/100
Other Landmarks in Cape Town
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Frequently Asked Questions
Is air quality bad in Milnerton right now?
On 20 September 2026, overall air quality in Milnerton is very poor. AQI is the main air quality indicator at 96.2/100. Pollution peaks around 12:00 PM (PM1: 96.2/100).
Will air quality be worse tomorrow in Milnerton?
On 21 September 2026, air quality conditions in Milnerton will be similar to today, with AQI forecast at very poor at 82.4/100. Pollution peaks around 11:00 PM (PM1: 82.4/100).
When is air pollution at its worst in Milnerton?
Calm winter days are when air quality dips most at Milnerton, as emissions from the city bowl, harbour, and southern suburbs linger without the Cape's usual ventilation. Spring and summer bring the return of the reliable southeasterly wind, which keeps particulate levels consistently low across the area, a seasonal pattern typical of the wider Cape region.
Are air quality levels in Milnerton 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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