What is the air quality trend in Swansea?

Over the past 15 days, Swansea had an average AQI of 65 based on station measurements. The worst day was 2026-05-19 with AQI 91.

How is Swansea air quality measured?

Air quality in Swansea 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 Swansea, United Kingdom

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

329h

PM2.5 Station

329h · 4 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	37	12–99	9.7 µg/m³	21h	3
2026-05-28	56	31–153	15.3 µg/m³	24h	4
2026-05-27	56	16–91	15.4 µg/m³	24h	4
2026-05-26	56	12–126	16.3 µg/m³	24h	4
2026-05-25	91	8–328	42.5 µg/m³	24h	5
2026-05-24	48	12–144	14.0 µg/m³	24h	3
2026-05-23	51	23–109	13.8 µg/m³	21h	4
2026-05-22	78	25–217	30.5 µg/m³	24h	5
2026-05-21	72	25–178	26.9 µg/m³	24h	5
2026-05-20	66	27–178	22.3 µg/m³	23h	5
2026-05-19	91	26–179	32.9 µg/m³	23h	6
2026-05-18	61	4–153	19.6 µg/m³	24h	6
2026-05-17	71	45–116	21.6 µg/m³	23h	7
2026-05-16	73	8–265	31.7 µg/m³	23h	7
2026-05-15	79	47–133	24.9 µg/m³	3h	7

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