What is the air quality trend in Carmarthen?

Over the past 20 days, Carmarthen had an average AQI of 58 based on station measurements. The worst day was 2026-05-19 with AQI 83.

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

471h

PM2.5 Station

471h · 2 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	43	17–108	11.4 µg/m³	23h	4
2026-05-28	56	25–161	15.5 µg/m³	23h	4
2026-05-27	55	14–76	15.0 µg/m³	24h	4
2026-05-26	66	12–309	27.4 µg/m³	22h	4
2026-05-25	65	8–198	22.5 µg/m³	24h	5
2026-05-24	60	24–172	20.0 µg/m³	24h	3
2026-05-23	51	24–170	15.8 µg/m³	23h	4
2026-05-22	66	25–178	21.6 µg/m³	24h	5
2026-05-21	60	25–187	21.1 µg/m³	24h	4
2026-05-20	60	18–177	20.2 µg/m³	24h	4
2026-05-19	83	9–272	35.2 µg/m³	23h	6
2026-05-18	59	5–151	18.4 µg/m³	24h	6
2026-05-17	70	26–162	22.8 µg/m³	23h	7
2026-05-16	66	15–207	23.9 µg/m³	22h	6
2026-05-15	52	10–90	14.4 µg/m³	24h	7
2026-05-14	67	18–152	20.8 µg/m³	24h	7
2026-05-13	46	17–79	11.9 µg/m³	24h	6
2026-05-12	47	15–88	12.6 µg/m³	24h	7
2026-05-11	41	15–115	10.9 µg/m³	24h	6
2026-05-10	63	16–167	20.0 µg/m³	24h	7

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