What is the air quality trend in City of Westminster?

Over the past 15 days, City of Westminster had an average AQI of 23 based on station measurements. The worst day was with AQI .

How is City of Westminster air quality measured?

Air quality in City of Westminster 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 City of Westminster, United Kingdom

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

Historical PM2.5 and AQI trend from monitoring stations near City of Westminster, United Kingdom.

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

PM2.5 Trend

271h · 2 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-10	14	4–18	3.2 µg/m³	9.4	20h	18
2026-04-09	21	9–57	5.3 µg/m³	14.8	19h	16
2026-04-08	71	37–84	21.9 µg/m³	28.6	10h	17
2026-04-07	41	18–61	10.3 µg/m³	19.5	24h	21
2026-04-06	12	4–24	3.0 µg/m³	8.8	21h	16
2026-04-05	14	8–21	3.3 µg/m³	3.8	3h	1
2026-04-04	11	7–15	2.6 µg/m³	7.3	15h	18
2026-04-03	11	4–19	2.7 µg/m³	7.2	24h	21
2026-04-02	19	10–28	4.5 µg/m³	8.1	24h	19
2026-04-01	31	13–52	7.6 µg/m³	11.3	24h	19
2026-03-31	29	17–43	6.9 µg/m³	12.5	24h	20
2026-03-30	25	12–50	6.0 µg/m³	13.6	13h	17
2026-03-29	15	11–35	3.6 µg/m³	8.3	24h	20
2026-03-28	16	11–23	3.8 µg/m³	11.0	22h	21
2026-03-27	28	27–30	6.8 µg/m³	14.2	4h	22

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