What is the air quality trend in Harwich?

Over the past 15 days, Harwich had an average AQI of 55 based on station measurements. The worst day was 2026-05-25 with AQI 78.

How is Harwich air quality measured?

Air quality in Harwich 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 Harwich, United Kingdom

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

245h

PM2.5 Station

245h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	35	34–38	8.5 µg/m³	3h	1
2026-05-29	43	16–134	12.2 µg/m³	14h	1
2026-05-28	49	13–170	15.3 µg/m³	17h	1
2026-05-27	66	14–264	35.1 µg/m³	14h	2
2026-05-26	51	10–119	14.2 µg/m³	18h	2
2026-05-25	78	20–350	36.4 µg/m³	16h	2
2026-05-24	53	3–308	23.2 µg/m³	19h	1
2026-05-23	47	6–195	17.7 µg/m³	18h	1
2026-05-22	43	25–96	11.5 µg/m³	17h	2
2026-05-21	54	6–235	26.5 µg/m³	14h	1
2026-05-20	61	11–320	28.1 µg/m³	19h	2
2026-05-19	69	13–164	24.2 µg/m³	19h	2
2026-05-18	47	13–117	13.7 µg/m³	21h	2
2026-05-17	62	9–145	19.1 µg/m³	21h	2
2026-05-16	70	1–156	22.8 µg/m³	15h	2

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