Etwatwa Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (10 October): Air quality in Etwatwa is moderate. AQI, PM2.5, NO2, O3, and PM1 are moderate; PM10, SO2, and HCHO are fair; CO is good. Pollution peaks around 8:00 PM (PM1: 57.8/100).
Air Quality Tomorrow
Tomorrow (11 October 2026): Air quality in Etwatwa is poor. AQI worsens to poor; O3 decreases to fair; SO2 increases to moderate; HCHO increases to moderate; PM1 increases to poor; all other pollutants stay as today. Pollution peaks around 10:00 PM (PM1: 60.2/100).
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Air Quality
Today - 10 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Moderate | 57.8/100 |
| PM2.5 (fine particles) | Moderate | 53.8/100 |
| PM10 (coarse particles) | Fair | 32.3/100 |
| NO2 (nitrogen dioxide) | Moderate | 43.6/100 |
| O3 (ozone) | Moderate | 51.9/100 |
| SO2 (sulfur dioxide) | Fair | 28.5/100 |
| CO (carbon monoxide) | Good | 1.3/100 |
| HCHO (formaldehyde) | Fair | 33.1/100 |
| PM1 (ultrafine particles) | Moderate | 57.8/100 |
Tomorrow - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Poor | 60.2/100 |
| PM2.5 (fine particles) | Moderate | 56.0/100 |
| PM10 (coarse particles) | Fair | 34.9/100 |
| NO2 (nitrogen dioxide) | Moderate | 44.5/100 |
| O3 (ozone) | Fair | 36.8/100 |
| SO2 (sulfur dioxide) | Moderate | 40.5/100 |
| CO (carbon monoxide) | Good | 1.9/100 |
| HCHO (formaldehyde) | Moderate | 43.1/100 |
| PM1 (ultrafine particles) | Poor | 60.2/100 |
Local Environmental Conditions
Around the center of Etwatwa, dense development means road traffic is the main local source of nitrogen dioxide and fine particles. On some days, pollution drifting in from farther away outweighs local sources. Exhaust from nearby roads is usually highest close to busy streets and junctions. Smaller sources, such as construction, lawn equipment and barbecues, add to the mix.
From June to August, temperatures near 10°C let smoke and particles from home heating and traffic build up, especially on cold, still mornings. From November to March, strong sunshine and temperatures around 22°C drive ozone formation, with levels peaking in the afternoon. Dry weather from August to September lets wind lift dust from open ground, raising coarse particle levels and sometimes leaving a dusty haze.
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Frequently Asked Questions About Air Quality in Gauteng
Is air quality bad in Etwatwa right now?
On 10 October 2026, overall air quality in Etwatwa is moderate. AQI is the main air quality indicator at 57.8/100. Pollution peaks around 8:00 PM (PM1: 57.8/100).
Will air quality be worse tomorrow in Etwatwa?
On 11 October 2026, air quality conditions in Etwatwa will be worse than today, with AQI forecast at poor at 60.2/100. Pollution peaks around 10:00 PM (PM1: 60.2/100).
When is air pollution at its worst in Etwatwa?
From June to August, temperatures near 10°C let smoke and particles from home heating and traffic build up, especially on cold, still mornings. From November to March, strong sunshine and temperatures around 22°C drive ozone formation, with levels peaking in the afternoon. Dry weather from August to September lets wind lift dust from open ground, raising coarse particle levels and sometimes leaving a dusty haze.
Are air quality levels in Etwatwa 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.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |