What is the air quality trend in Hereford?

Over the past 15 days, Hereford had an average AQI of 50 based on station measurements. The worst day was 2026-07-16 with AQI 95.

How is Hereford air quality measured?

Air quality in Hereford 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 Hereford, United Kingdom

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

240h

PM2.5 Station

240h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	37	32–44	8.8 µg/m³	3h	1
2026-07-21	39	17–63	9.6 µg/m³	20h	2
2026-07-20	28	5–54	6.7 µg/m³	18h	2
2026-07-19	52	26–134	14.4 µg/m³	23h	2
2026-07-18	44	23–122	12.1 µg/m³	19h	1
2026-07-17	53	14–190	18.1 µg/m³	19h	2
2026-07-16	95	18–495	56.4 µg/m³	14h	2
2026-07-15	61	13–184	25.5 µg/m³	12h	2
2026-07-14	53	8–154	14.8 µg/m³	19h	1
2026-07-13	41	14–104	11.3 µg/m³	17h	1
2026-07-12	63	1–190	24.5 µg/m³	18h	2
2026-07-11	46	3–169	14.7 µg/m³	14h	1
2026-07-10	58	3–142	17.1 µg/m³	17h	2
2026-07-09	43	20–68	10.8 µg/m³	14h	2
2026-07-08	43	15–119	11.8 µg/m³	13h	1

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