What is the air quality trend in Harrow?

Over the past 8 days, Harrow had an average AQI of 50 based on station measurements. The worst day was 2026-06-09 with AQI 63.

How is Harrow air quality measured?

Air quality in Harrow 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 Harrow, United Kingdom

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 12 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-13	38	18–61	9.4 µg/m³	7.6	11h	23
2026-06-12	48	27–90	12.3 µg/m³	6.8	24h	24
2026-06-11	48	20–129	13.2 µg/m³	7.3	24h	23
2026-06-10	57	25–141	15.8 µg/m³	9.1	24h	24
2026-06-09	63	34–155	18.5 µg/m³	10.0	24h	23
2026-06-08	46	27–62	11.6 µg/m³	7.3	24h	25
2026-06-07	49	26–77	12.6 µg/m³	11.0	24h	24
2026-06-06	54	20–102	15.3 µg/m³	7.4	13h	21

Back to Harrow Air Quality