What is the air quality trend in Westport?

Over the past 7 days, Westport had an average AQI of 77 based on station measurements. The worst day was 2026-07-17 with AQI 108.

How is Westport air quality measured?

Air quality in Westport 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 Westport, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Westport, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	50	25–155	13.5 µg/m³	24h	4
2026-07-20	45	17–93	12.0 µg/m³	24h	4
2026-07-19	66	31–117	19.5 µg/m³	24h	4
2026-07-18	103	43–173	38.2 µg/m³	24h	5
2026-07-17	108	50–184	43.4 µg/m³	24h	5
2026-07-16	106	63–181	43.4 µg/m³	24h	5
2026-07-15	65	27–136	19.9 µg/m³	23h	4

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