Worst air pollution Delmas, today and tomorrow
Today (20 September): Air quality in Delmas is moderate. AQI, PM2.5, and PM1 are moderate; PM10, O3, and SO2 are fair; NO2, CO, and HCHO are good. Pollution peaks around 9:00 PM (PM1: 45.4/100).
Tomorrow (21 September 2026): Air quality in Delmas is poor. AQI worsens to poor; NO2 increases to fair; PM1 increases to poor; all other pollutants stay as today. Pollution peaks around 10:00 PM (PM1: 62.2/100). Airmine updates local air quality forecasts four times daily.
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Delmas lies roughly 240 km west-southwest of Nelspruit. Delmas's position on the open Highveld plateau means vehicle traffic and coal mining and power station operations drive most local emissions, with winter inversions occasionally trapping pollution close to the ground. Summer brings stronger winds and regular thunderstorms that generally keep particulate levels lower across the surrounding area. It's a fairly standard picture for this part of the plateau.
Today - 20 September | Pollution peaks at 21:00
AQI:
Moderate
45.4/100
PM2.5 (fine particles):
Moderate
42.8/100
PM10 (coarse particles):
Fair
20.3/100
NO2 (nitrogen dioxide):
Good
19.8/100
O3 (ozone):
Fair
24.5/100
SO2 (sulfur dioxide):
Fair
35.0/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Moderate
45.4/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 22:00
AQI:
Poor
62.2/100
PM2.5 (fine particles):
Moderate
56.4/100
PM10 (coarse particles):
Fair
37.2/100
NO2 (nitrogen dioxide):
Fair
28.9/100
O3 (ozone):
Fair
29.9/100
SO2 (sulfur dioxide):
Fair
33.8/100
CO (carbon monoxide):
Good
1.1/100
HCHO (formaldehyde):
Good
12.7/100
PM1 (ultrafine particles):
Poor
62.2/100
Pollen forecast in Delmas
View pollen forecastFrequently Asked Questions
Is air quality bad in Delmas right now?
On 20 September 2026, overall air quality in Delmas is moderate. AQI is the main air quality indicator at 45.4/100. Pollution peaks around 9:00 PM (PM1: 45.4/100).
Will air quality be worse tomorrow in Delmas?
On 21 September 2026, air quality conditions in Delmas will be worse than today, with AQI forecast at poor at 62.2/100. Pollution peaks around 10:00 PM (PM1: 62.2/100).
When is air pollution at its worst in Delmas?
Winter is when air quality dips most at Delmas, as still mornings allow emissions from coal mining and power station operations to concentrate under a Highveld inversion layer. From spring onward, increasing rain and wind generally keep conditions clearer through summer and into early autumn, a seasonal pattern typical of the wider Highveld plateau.
Are air quality levels in Delmas 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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