What is the air quality trend in Harlesden?

Over the past 8 days, Harlesden had an average AQI of 40 based on station measurements. The worst day was 2026-08-03 with AQI 49.

How is Harlesden air quality measured?

Air quality in Harlesden 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 Harlesden, United Kingdom

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 27 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-08-08	36	36–36	8.6 µg/m³	1.1	1h	27
2026-08-07	41	25–78	10.2 µg/m³	11.0	24h	28
2026-08-06	39	23–100	10.0 µg/m³	9.4	24h	33
2026-08-05	38	25–70	9.2 µg/m³	10.0	24h	37
2026-08-04	42	26–85	10.5 µg/m³	12.7	24h	32
2026-08-03	49	32–150	13.0 µg/m³	15.0	24h	30
2026-08-02	39	23–57	9.4 µg/m³	9.5	24h	29
2026-08-01	37	24–79	9.2 µg/m³	9.2	20h	29

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