What is the air quality trend in Harlem?

Over the past 15 days, Harlem had an average AQI of 52 based on station measurements. The worst day was 2026-07-18 with AQI 136.

How is Harlem air quality measured?

Air quality in Harlem 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 Harlem, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

283h

PM2.5 Station

283h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	33	6–58	8.1 µg/m³	23h	1
2026-07-20	18	8–33	4.4 µg/m³	22h	1
2026-07-19	55	21–87	16.0 µg/m³	24h	1
2026-07-18	136	29–184	61.4 µg/m³	24h	1
2026-07-17	119	25–211	61.9 µg/m³	24h	1
2026-07-16	128	73–263	63.1 µg/m³	24h	1
2026-07-15	120	18–206	62.9 µg/m³	14h	1
2026-07-14	11	5–20	2.7 µg/m³	4h	1
2026-07-13	9	4–17	2.2 µg/m³	5h	1
2026-07-12	29	9–53	6.9 µg/m³	22h	1
2026-07-11	35	12–58	8.6 µg/m³	24h	1
2026-07-10	35	12–66	8.8 µg/m³	24h	1
2026-07-09	28	4–105	7.3 µg/m³	24h	1
2026-07-08	18	3–45	4.4 µg/m³	24h	1
2026-07-07	7	7–7	1.6 µg/m³	1h	1

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