What is the air quality trend in Westport?

Over the past 15 days, Westport had an average AQI of 57 based on station measurements. The worst day was 2026-07-16 with AQI 114.

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

334h

PM2.5 Station

334h · 4 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	33	33–33	7.9 µg/m³	1h	4
2026-07-21	51	25–104	13.2 µg/m³	24h	5
2026-07-20	55	24–93	15.5 µg/m³	24h	5
2026-07-19	67	32–101	19.8 µg/m³	24h	5
2026-07-18	106	50–160	38.1 µg/m³	24h	5
2026-07-17	114	47–243	49.0 µg/m³	24h	6
2026-07-16	114	65–196	48.9 µg/m³	24h	5
2026-07-15	74	29–175	28.3 µg/m³	24h	4
2026-07-14	43	18–60	10.6 µg/m³	24h	4
2026-07-13	34	23–52	8.1 µg/m³	23h	3
2026-07-12	34	15–52	8.1 µg/m³	24h	4
2026-07-11	39	28–55	9.4 µg/m³	24h	5
2026-07-10	35	21–45	8.3 µg/m³	24h	6
2026-07-09	35	17–49	8.5 µg/m³	24h	6
2026-07-08	34	24–46	8.0 µg/m³	22h	5

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