What is the air quality trend in Carmarthen?

Over the past 21 days, Carmarthen had an average AQI of 40 based on station measurements. The worst day was 2026-08-25 with AQI 67.

How is Carmarthen air quality measured?

Air quality in Carmarthen 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 Carmarthen, United Kingdom

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

358h

PM2.5 Station

358h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	38	25–61	9.3 µg/m³	18h	1
2026-09-04	31	14–46	7.4 µg/m³	21h	1
2026-09-03	41	20–57	10.0 µg/m³	19h	1
2026-09-02	30	9–53	7.1 µg/m³	22h	1
2026-09-01	31	17–51	7.4 µg/m³	18h	1
2026-08-31	37	25–55	9.0 µg/m³	19h	1
2026-08-30	32	22–55	7.8 µg/m³	18h	1
2026-08-29	38	17–65	9.3 µg/m³	13h	1
2026-08-28	38	29–65	9.4 µg/m³	18h	1
2026-08-27	53	35–72	14.2 µg/m³	17h	1
2026-08-26	57	40–78	15.2 µg/m³	17h	1
2026-08-25	67	34–132	20.2 µg/m³	23h	1
2026-08-24	65	30–82	18.8 µg/m³	17h	1
2026-08-23	50	13–78	13.8 µg/m³	10h	1
2026-08-22	40	27–65	9.9 µg/m³	14h	1
2026-08-21	31	15–63	7.9 µg/m³	19h	1
2026-08-20	30	17–55	7.3 µg/m³	23h	1
2026-08-19	33	22–51	7.8 µg/m³	11h	1
2026-08-18	36	23–57	8.7 µg/m³	19h	1
2026-08-17	39	17–72	9.9 µg/m³	19h	1
2026-08-16	30	26–38	7.3 µg/m³	3h	1

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