What is the air quality trend in Horley?

Over the past 8 days, Horley had an average AQI of 54 based on station measurements. The worst day was 2026-05-25 with AQI 74.

How is Horley air quality measured?

Air quality in Horley 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 Horley, United Kingdom

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

169h

PM2.5 Station

169h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	7	7–7	1.7 µg/m³	4.5	1h	1
2026-05-29	47	32–62	11.6 µg/m³	20.0	24h	40
2026-05-28	56	38–162	15.6 µg/m³	25.6	24h	39
2026-05-27	62	42–99	17.3 µg/m³	25.9	24h	43
2026-05-26	64	39–109	18.5 µg/m³	22.9	24h	46
2026-05-25	74	48–119	22.9 µg/m³	29.9	24h	51
2026-05-24	60	35–92	16.9 µg/m³	24.4	24h	41
2026-05-23	63	43–145	17.9 µg/m³	18.5	24h	42

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