What is the air quality trend in Hempstead?

Over the past 14 days, Hempstead had an average AQI of 27 based on station measurements. The worst day was 2026-05-19 with AQI 51.

How is Hempstead air quality measured?

Air quality in Hempstead 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 Hempstead, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

336h

PM2.5 Station

336h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	19	8–28	4.5 µg/m³	1.5	24h	12
2026-05-28	23	14–39	5.5 µg/m³	7.0	24h	12
2026-05-27	27	17–33	6.5 µg/m³	5.1	24h	14
2026-05-26	25	16–38	5.9 µg/m³	5.4	24h	10
2026-05-25	29	14–84	7.4 µg/m³	16.9	24h	10
2026-05-24	20	6–32	4.8 µg/m³	1.8	24h	8
2026-05-23	20	12–28	4.9 µg/m³	1.2	24h	8
2026-05-22	18	7–27	4.3 µg/m³	7.4	24h	11
2026-05-21	19	12–28	4.5 µg/m³	3.5	24h	12
2026-05-20	31	23–45	7.5 µg/m³	6.1	24h	13
2026-05-19	51	30–67	13.1 µg/m³	17.5	24h	13
2026-05-18	46	30–58	11.3 µg/m³	12.4	24h	14
2026-05-17	33	20–40	7.9 µg/m³	4.8	24h	12
2026-05-16	25	18–38	6.1 µg/m³	2.4	24h	12

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