What is the air quality trend in Smithtown?

Over the past 14 days, Smithtown had an average AQI of 107 based on station measurements. The worst day was 2026-07-16 with AQI 167.

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

186h

PM2.5 Station

186h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	97	9–166	38.0 µg/m³	8h	2
2026-07-21	111	11–166	46.2 µg/m³	20h	2
2026-07-20	142	45–166	64.0 µg/m³	15h	1
2026-07-19	138	12–166	64.2 µg/m³	18h	1
2026-07-18	135	23–166	59.8 µg/m³	19h	1
2026-07-17	156	41–174	78.0 µg/m³	16h	1
2026-07-16	167	166–177	85.5 µg/m³	14h	1
2026-07-15	153	46–166	74.8 µg/m³	12h	1
2026-07-14	151	99–166	71.5 µg/m³	14h	1
2026-07-13	112	36–166	52.2 µg/m³	7h	1
2026-07-12	41	32–52	9.9 µg/m³	6h	2
2026-07-11	41	18–56	10.2 µg/m³	10h	2
2026-07-10	28	18–40	6.8 µg/m³	15h	2
2026-07-09	34	24–50	8.0 µg/m³	12h	2

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