What is the air quality trend in Koster?

Over the past 7 days, Koster had an average AQI of 52 based on station measurements. The worst day was 2026-05-25 with AQI 66.

How is Koster air quality measured?

Air quality in Koster 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 Koster, South Africa

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

92h

PM2.5 Station

92h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-28	47	2–117	13.4 µg/m³	12h	1
2026-05-27	54	9–153	16.9 µg/m³	12h	1
2026-05-26	56	10–194	21.7 µg/m³	14h	1
2026-05-25	66	1–192	24.9 µg/m³	16h	1
2026-05-24	36	14–56	8.8 µg/m³	12h	2
2026-05-23	62	21–178	24.6 µg/m³	12h	1
2026-05-22	49	8–155	15.5 µg/m³	14h	1

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