What is the air quality trend in Sydney?

Over the past 7 days, Sydney had an average AQI of 26 based on station measurements. The worst day was with AQI .

How is Sydney air quality measured?

Air quality in Sydney 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 Sydney, Australia

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

Historical PM2.5 and AQI trend from monitoring stations near Sydney, Australia.

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

105h · 4 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	34	6–54	8.2 µg/m³	12.5	21h	3
2026-04-09	55	38–64	14.2 µg/m³	20.5	17h	3
2026-04-08	22	5–29	5.4 µg/m³	10.9	9h	4
2026-04-07	32	15–50	7.8 µg/m³	13.9	24h	4
2026-04-06	21	7–32	5.0 µg/m³	7.7	18h	4
2026-04-04	15	6–20	3.6 µg/m³	8.8	14h	4
2026-04-03	9	8–10	2.1 µg/m³	4.2	2h	2

Back to Sydney Air Quality