What is the air quality trend in Castlereagh?

Over the past 15 days, Castlereagh had an average AQI of 55 based on station measurements. The worst day was 2026-07-22 with AQI 85.

How is Castlereagh air quality measured?

Air quality in Castlereagh 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 Castlereagh, United Kingdom

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

Historical PM2.5 and AQI trend from monitoring stations near Castlereagh, United Kingdom.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

330h

PM2.5 Station

330h · 3 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	85	18–235	47.8 µg/m³	8h	3
2026-07-21	38	18–70	9.4 µg/m³	24h	4
2026-07-20	48	20–181	15.7 µg/m³	24h	4
2026-07-19	52	12–158	15.2 µg/m³	24h	4
2026-07-18	61	24–153	17.9 µg/m³	23h	4
2026-07-17	68	25–220	24.2 µg/m³	24h	3
2026-07-16	62	36–149	18.1 µg/m³	23h	4
2026-07-15	47	19–91	12.4 µg/m³	23h	3
2026-07-14	56	27–110	15.8 µg/m³	24h	3
2026-07-13	51	13–202	18.3 µg/m³	24h	4
2026-07-12	59	18–228	22.7 µg/m³	24h	3
2026-07-11	56	17–168	17.4 µg/m³	24h	4
2026-07-10	56	25–156	15.9 µg/m³	23h	3
2026-07-09	42	16–92	10.9 µg/m³	23h	3
2026-07-08	45	22–68	11.5 µg/m³	15h	3

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