SmogRank / South Africa / Mpumalanga

Air quality in Leslie

Mpumalanga, South Africa. PM2.5 from 1 reference monitor, updated hourly.

93India AQI
Satisfactory

Latest hour (04:00 UTC), 3.7× the WHO 24-hour guideline. PM2.5 56.1 µg/m³.

Rank, worst first

24 hours–not enough data
7 days#105of 2,604, at 45 India AQI (26.7 µg/m³)
30 days#181of 2,624, at 61 India AQI (37.0 µg/m³)
This year–not enough data

Why it ranks here

Likely fire smoke. On Oct 1, when Leslie averaged 18.3 µg/m³, NASA satellites detected 349 fires within 300 km (56 within 100 km). Smoke from those fires is a likely contributor; we don't check which way the wind blew, and mapped smoke can be high above the ground.

Based on Leslie's own measurements, with fire detections from NASA FIRMS and smoke maps from NOAA HMS; causes are the usual kinds for a pattern like this, not a confirmed source.

The last 12 months, day by day

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data2026-05-26: no data2026-05-27: no data2026-05-28: no data2026-05-29: no data2026-05-30: no data2026-05-31: no data2026-06-01: no data2026-06-02: no data2026-06-03: no data2026-06-04: no data2026-06-05: no data2026-06-06: no data2026-06-07: no data2026-06-08: no data2026-06-09: no data2026-06-10: no data2026-06-11: no data2026-06-12: no data2026-06-13: no data2026-06-14: no data2026-06-15: no data2026-06-16: no data2026-06-17: no data2026-06-18: no data2026-06-19: no data2026-06-20: no data2026-06-21: no data2026-06-22: no data2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: no data2026-06-27: no data2026-06-28: no data2026-06-29: no data2026-06-30: no data2026-07-01: no data2026-07-02: no data2026-07-03: no data2026-07-04: no data2026-07-05: no data2026-07-06: no data2026-07-07: no data2026-07-08: no data2026-07-09: no data2026-07-10: no data2026-07-11: no data2026-07-12: no data2026-07-13: no data2026-07-14: no data2026-07-15: no data2026-07-16: no data2026-07-17: no data2026-07-18: no data2026-07-19: no data2026-07-20: no data2026-07-21: no data2026-07-22: no data2026-07-23: no data2026-07-24: no data2026-07-25: no data2026-07-26: no data2026-07-27: no data2026-07-28: no data2026-07-29: no data2026-07-30: no data2026-07-31: no data2026-08-01: no data2026-08-02: no data2026-08-03: no data2026-08-04: no data2026-08-05: no data2026-08-06: no data2026-08-07: no data2026-08-08: no data2026-08-09: no data2026-08-10: no data2026-08-11: no data2026-08-12: 14.4 µg/m³2026-08-13: 36.2 µg/m³2026-08-14: 43.0 µg/m³2026-08-15: 99.3 µg/m³2026-08-16: 41.9 µg/m³2026-08-17: 23.5 µg/m³2026-08-18: 47.1 µg/m³2026-08-19: 72.4 µg/m³2026-08-20: 79.0 µg/m³2026-08-21: 54.3 µg/m³2026-08-22: 50.4 µg/m³2026-08-23: 29.9 µg/m³2026-08-24: 31.6 µg/m³2026-08-25: 35.2 µg/m³2026-08-26: 44.9 µg/m³2026-08-27: 57.9 µg/m³2026-08-28: 53.8 µg/m³2026-08-29: 32.4 µg/m³2026-08-30: 30.3 µg/m³2026-08-31: 40.2 µg/m³2026-09-01: 39.0 µg/m³2026-09-02: 46.6 µg/m³2026-09-03: 37.0 µg/m³2026-09-04: 56.6 µg/m³2026-09-05: 25.6 µg/m³2026-09-06: 18.3 µg/m³2026-09-07: 16.2 µg/m³2026-09-08: no data2026-09-09: 92.0 µg/m³2026-09-10: 42.8 µg/m³2026-09-11: 49.4 µg/m³2026-09-12: 60.8 µg/m³2026-09-13: 39.5 µg/m³2026-09-14: 32.5 µg/m³2026-09-15: 28.8 µg/m³2026-09-16: 50.6 µg/m³2026-09-17: no data2026-09-18: no data2026-09-19: 20.3 µg/m³2026-09-20: 36.5 µg/m³2026-09-21: 34.2 µg/m³2026-09-22: 42.3 µg/m³2026-09-23: 50.3 µg/m³2026-09-24: 32.1 µg/m³2026-09-25: 52.9 µg/m³2026-09-26: 32.8 µg/m³2026-09-27: 32.9 µg/m³2026-09-28: 25.4 µg/m³2026-09-29: 11.4 µg/m³2026-09-30: 12.9 µg/m³2026-10-01: 18.3 µg/m³. Likely fire smoke
45 of 48 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day; outlined days are named in the notes above.
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+

India's National Air Quality Index (CPCB), PM2.5 sub-index. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Last 4 days, hour by hour

15562026-10-02 00:00 UTC: 12.5 µg/m³2026-10-02 01:00 UTC: 14.4 µg/m³2026-10-02 02:00 UTC: 20.7 µg/m³2026-10-02 03:00 UTC: 53.8 µg/m³2026-10-02 04:00 UTC: 56.1 µg/m³Sep 29Sep 30Oct 1Oct 2
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where it stood each day

Top 10Top 100#1#10#100#1,000#2,835Sep#444
Its rank on each day's world board, #1 being the most polluted city that day. The scale is logarithmic: each step down is ten times as many cities. See it among every city.

2026 against 2025, month by month

15JanFebMarAprMayJunJulAug 2026: 45.9 µg/m³AugSep 2026: 37.8 µg/m³SepOctNovDec
Faded bars: 2025. A month shows once it has 10 measured days.

Monitors

StationOperatorType
LebohangPermission requested (South Africa DFFE, SAAQIS, 2026-10-01)South AfricaReference

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Use this page

SmogRank, PM2.5 daily means, Leslie, South Africa, 12 Aug 2026 – 1 Oct 2026, smogrank.com/za/leslie (accessed 2 Oct 2026).

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Other cities in South Africa

30-day averages, India AQI. All of South Africa.

Updated 2026-10-02 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the India AQI PM2.5 sub-index.