Good air quality reading for Graaff‑Reinet; PM2.5 meets WHO annual guideline
Graaff‑Reinet recorded favourable air quality on the IQAir real‑time index on 4 September, with an AQI⁺ US value of 12 reported as "Good" for the 14:00–15:00 local time hour. The platform's data indicate that PM2.5 concentrations currently meet the World Health Organization annual guideline, a benchmark used internationally to assess long‑term fine particulate exposure.
The IQAir hourly forecast, published for Graaff‑Reinet, also includes short‑range weather parameters that affect pollutant dispersion. The site listed the immediate outlook as:
- Today: high 14°C, low 10°C, wind 44 km/h, humidity 70%
- Saturday: high 18°C, low 7°C, wind 23 km/h, humidity 66%
- Sunday: high 21°C, low 12°C, wind 21 km/h, humidity 69%
These wind speeds and humidity figures are relevant because stronger winds generally aid dispersion of local emissions while higher humidity can influence particulate behaviour and monitoring readings.
"PM2.5 concentration currently meets the WHO annual PM2.5 guideline," the IQAir report states.
Where Graaff‑Reinet sits in the national AQI ranking
The IQAir real‑time South Africa city ranking listed several urban centres with higher AQI values at the time of the snapshot. The platform's top ten for poorer air quality included industrial towns and major metros; Graaff‑Reinet was not shown among the higher‑ranked cities. The ranking headliners were:
| Rank | City | AQI⁺ US |
|---|---|---|
| 1 | Embalenhle, Mpumalanga | 197 |
| 2 | Emalahleni, Mpumalanga | 178 |
| 3 | Polokwane, Limpopo | 157 |
| 4 | Centurion, Gauteng | 142 |
| 5 | Thabazimbi, Limpopo | 137 |
| 6 | Johannesburg, Gauteng | 134 |
| 7 | Pretoria, Gauteng | 134 |
| 8 | Saldanha, Western Cape | 93 |
| 9 | Empangeni, KwaZulu‑Natal | 81 |
| 10 | Richards Bay, KwaZulu‑Natal | 81 |
IQAir's snapshot places several Mpumalanga and Limpopo towns at the upper end of the national index, reflecting ongoing pollution episodes elsewhere. The Graaff‑Reinet data do not appear in that list of higher‑AQI cities at the time of the report.
Local context and what residents should note
Local residents planning outdoor activities should note that the platform recorded an AQI value categorised as "Good" during the 14:00–15:00 hour, and that the PM2.5 concentration meets the WHO annual guideline. The IQAir entry also indicates that no specific locations in Graaff‑Reinet were available in its "cleanest air locations" subset at the time — a limitation in granularity rather than evidence of local hotspots.
Air quality is variable and sensitive to short‑term factors such as wind, temperature and humidity, which IQAir includes in its hourly and daily forecasts. Residents with respiratory conditions should continue to monitor readings from established sensors and public health advisories, and consider the following practical precautions when AQI rises:
- Limit prolonged outdoor exertion during periods of higher AQI;
- Keep medications accessible if you have asthma or chronic respiratory illness;
- Check multiple sources—local government air monitors, provincial environmental services and real‑time platforms—to build a fuller picture.
At the time of the IQAir report, Graaff‑Reinet's immediate forecast pointed to moderate winds through the weekend and daytime temperatures rising to about 21°C on Sunday, conditions that usually support dispersion of local emissions. The report did not include local emission sources or municipal monitoring data; for regulatory compliance and long‑term trends, provincial air quality authorities and Stats SA datasets remain the authoritative records.
Residents can follow updated hourly AQI forecasts and pollutant concentrations through IQAir and through official provincial channels to stay informed about changes in local air quality.
