What is the air quality trend in Hounslow?

Over the past 8 days, Hounslow had an average AQI of 48 based on station measurements. The worst day was 2026-10-20 with AQI 63.

How is Hounslow air quality measured?

Air quality in Hounslow 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 Hounslow, United Kingdom

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 20 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	56	20–87	15.7 µg/m³	7.7	20h	44
2026-10-20	63	34–117	18.1 µg/m³	26.9	24h	47
2026-10-19	46	28–61	11.3 µg/m³	13.3	24h	35
2026-10-18	45	24–75	11.4 µg/m³	8.9	24h	38
2026-10-17	49	29–74	12.5 µg/m³	9.9	24h	51
2026-10-16	38	23–63	9.2 µg/m³	8.4	24h	37
2026-10-15	40	23–57	9.9 µg/m³	8.6	24h	41
2026-10-14	51	38–64	13.7 µg/m³	8.7	2h	42

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