What is the air quality trend in Dorchester?

Over the past 15 days, Dorchester had an average AQI of 44 based on station measurements. The worst day was 2026-07-18 with AQI 65.

How is Dorchester air quality measured?

Air quality in Dorchester 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 Dorchester, United Kingdom

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

246h

PM2.5 Station

246h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	41	30–59	10.3 µg/m³	5h	2
2026-07-21	42	18–77	10.8 µg/m³	20h	2
2026-07-20	37	19–63	9.1 µg/m³	21h	2
2026-07-19	33	3–55	8.0 µg/m³	19h	1
2026-07-18	65	12–259	29.2 µg/m³	20h	2
2026-07-17	58	27–127	16.3 µg/m³	16h	2
2026-07-16	55	16–100	15.4 µg/m³	14h	1
2026-07-15	56	13–182	18.9 µg/m³	16h	2
2026-07-14	43	11–71	10.7 µg/m³	17h	1
2026-07-13	43	16–115	11.6 µg/m³	20h	2
2026-07-12	35	1–63	8.7 µg/m³	20h	2
2026-07-11	34	15–60	8.2 µg/m³	13h	2
2026-07-10	50	26–99	13.3 µg/m³	16h	2
2026-07-09	42	11–84	11.2 µg/m³	17h	2
2026-07-08	35	12–55	8.5 µg/m³	12h	2

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