Stay updated with real-time air quality in Hempstead, New York featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
52
Moderate
Hempstead, New York
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.21 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
49.48 μg/m³
0
55
155
255
425
605+
19.23 ppb
0
55
71
86
201
201+
1.21 ppb
0
36
76
186
605
1005+
20.89 ppb
0
54
101
361
1250
2050+
0.38 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Hempstead, New York
Hempstead, New York
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AQI 38
Good
6.71μg/m³
PM2.5
27.67μg/m³
PM10
21.59ppb
O3
0.51ppb
SO2
18.32ppb
NO2
0.48ppm
CO
AQI 38
Good
6.54μg/m³
PM2.5
29.04μg/m³
PM10
22.64ppb
O3
0.53ppb
SO2
17.90ppb
NO2
0.48ppm
CO
AQI 38
Good
6.54μg/m³
PM2.5
29.04μg/m³
PM10
22.64ppb
O3
0.53ppb
SO2
17.90ppb
NO2
0.48ppm
CO
AQI 27
Good
2.94μg/m³
PM2.5
13.92μg/m³
PM10
29.46ppb
O3
0.53ppb
SO2
22.15ppb
NO2
0.48ppm
CO
AQI 38
Good
6.75μg/m³
PM2.5
26.98μg/m³
PM10
18.32ppb
O3
0.47ppb
SO2
19.80ppb
NO2
0.47ppm
CO
AQI 28
Good
3.63μg/m³
PM2.5
19.86μg/m³
PM10
29.96ppb
O3
0.52ppb
SO2
18.74ppb
NO2
0.47ppm
CO
Air quality measurements for New York, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Hempstead, New York is updated on an hourly basis.
The worst air quality in Hempstead, New York was recorded at 01:00:00 on 2026-11-02.
The best air quality in Hempstead, New York was recorded at 01:00:00 on 2026-11-03.
The real-time air quality index in Hempstead, New York is 33, currently categorized as Good.
The most common pollutant in Hempstead, New York is PM2.5.
If the air quality in Hempstead, New York is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Hempstead, New York at present are 5.552 μg/m3.
The current PM10 levels in Hempstead, New York are 17.515 μg/m3.
The current carbon monoxide (CO) level in Hempstead, New York is 0.39 ppm.
The current sulfur dioxide (SO2) levels in Hempstead, New York are 0.495 ppb.
The current ozone (O3) levels at Hempstead, New York is 22.315 ppm.
The current nitrogen dioxide (NO2) levels at Hempstead, New York is 22.024 ppb.
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