What is the air quality trend in Westonaria?

Over the past 8 days, Westonaria had an average AQI of 79 based on station measurements. The worst day was 2026-07-14 with AQI 96.

How is Westonaria air quality measured?

Air quality in Westonaria is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Westonaria, South Africa

Name: Westonaria Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Westonaria, South Africa.

114

Current AQI
Unhealthy for sensitive groups CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	68	20–153	20.9 µg/m³	17.3	20h	11
2026-07-20	75	30–125	23.8 µg/m³	19.9	24h	9
2026-07-19	74	27–127	23.9 µg/m³	16.9	24h	10
2026-07-18	77	43–128	24.2 µg/m³	17.8	24h	10
2026-07-17	85	34–160	28.9 µg/m³	21.9	24h	8
2026-07-16	81	30–154	26.8 µg/m³	19.6	24h	9
2026-07-15	82	20–155	27.3 µg/m³	19.6	24h	8
2026-07-14	96	78–110	33.1 µg/m³	44.4	4h	6

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