What is the air quality trend in Hempstead?

Over the past 8 days, Hempstead had an average AQI of 85 based on station measurements. The worst day was 2026-07-17 with AQI 134.

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 CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 5 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	38	35–40	8.9 µg/m³	1.0	2h	4
2026-07-21	60	35–89	16.8 µg/m³	115.5	24h	8
2026-07-20	64	25–108	19.2 µg/m³	149.0	24h	7
2026-07-19	76	38–157	24.3 µg/m³	102.8	24h	7
2026-07-18	118	82–157	43.0 µg/m³	125.2	24h	8
2026-07-17	134	54–186	59.6 µg/m³	122.2	24h	7
2026-07-16	114	59–178	47.2 µg/m³	138.1	24h	7
2026-07-15	80	33–147	26.0 µg/m³	102.6	22h	6

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