What is the air quality trend in Smithtown?

Over the past 8 days, Smithtown had an average AQI of 64 based on station measurements. The worst day was 2026-09-01 with AQI 78.

How is Smithtown air quality measured?

Air quality in Smithtown 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 Smithtown, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-09-05	54	8–133	16.7 µg/m³	149.0	20h	4
2026-09-04	65	14–166	22.0 µg/m³	149.0	24h	4
2026-09-03	60	13–166	19.6 µg/m³	149.0	24h	4
2026-09-02	65	17–166	21.0 µg/m³	149.0	24h	4
2026-09-01	78	19–166	29.1 µg/m³	149.0	24h	4
2026-08-31	69	25–133	22.0 µg/m³	149.0	24h	4
2026-08-30	60	22–133	18.5 µg/m³	149.0	24h	4
2026-08-29	68	65–70	19.9 µg/m³	149.0	2h	6

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