What is the air quality trend in Hereford?

Over the past 21 days, Hereford had an average AQI of 61 based on station measurements. The worst day was 2026-06-03 with AQI 97.

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

373h

PM2.5 Station

373h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	89	25–153	32.7 µg/m³	2h	2
2026-06-08	46	7–158	14.0 µg/m³	19h	2
2026-06-07	51	8–144	15.2 µg/m³	18h	2
2026-06-06	58	10–157	17.8 µg/m³	21h	2
2026-06-05	62	13–151	19.9 µg/m³	23h	2
2026-06-04	56	17–149	16.8 µg/m³	20h	2
2026-06-03	97	21–500	81.3 µg/m³	20h	2
2026-06-02	39	5–103	10.6 µg/m³	21h	2
2026-06-01	47	9–112	13.3 µg/m³	20h	2
2026-05-31	31	12–65	7.8 µg/m³	12h	2
2026-05-30	49	25–88	13.6 µg/m³	15h	1
2026-05-29	47	3–98	13.4 µg/m³	14h	2
2026-05-28	67	8–165	22.3 µg/m³	15h	2
2026-05-27	65	8–129	20.3 µg/m³	17h	2
2026-05-26	64	18–179	21.7 µg/m³	20h	2
2026-05-25	77	9–260	32.6 µg/m³	21h	2
2026-05-24	70	13–151	22.6 µg/m³	21h	2
2026-05-23	70	4–173	25.3 µg/m³	20h	2
2026-05-22	62	11–151	19.4 µg/m³	17h	2
2026-05-21	68	4–166	23.3 µg/m³	20h	1
2026-05-20	79	11–173	31.0 µg/m³	17h	2

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