Stay updated with real-time air quality in Nashua, New Hampshire 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)
27
Good
Nashua, New Hampshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.12 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.61 μg/m³
0
55
155
255
425
605+
27.09 ppb
0
55
71
86
201
201+
0.56 ppb
0
36
76
186
605
1005+
7.44 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Nashua, New Hampshire
Nashua, New Hampshire
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AQI 39
Good
4.91μg/m³
PM2.5
41.93μg/m³
PM10
26.14ppb
O3
0.55ppb
SO2
5.45ppb
NO2
0.22ppm
CO
AQI 33
Good
6.07μg/m³
PM2.5
31.25μg/m³
PM10
26.17ppb
O3
0.57ppb
SO2
9.91ppb
NO2
0.24ppm
CO
AQI 22
Good
4.14μg/m³
PM2.5
14.64μg/m³
PM10
23.21ppb
O3
0.56ppb
SO2
5.80ppb
NO2
0.22ppm
CO
AQI 34
Good
6.07μg/m³
PM2.5
36.88μg/m³
PM10
27.13ppb
O3
0.56ppb
SO2
10.22ppb
NO2
0.23ppm
CO
AQI 27
Good
4.12μg/m³
PM2.5
14.03μg/m³
PM10
28.71ppb
O3
0.51ppb
SO2
4.22ppb
NO2
0.20ppm
CO
AQI 33
Good
6.34μg/m³
PM2.5
22.39μg/m³
PM10
23.91ppb
O3
0.58ppb
SO2
5.89ppb
NO2
0.23ppm
CO
Air quality measurements for New Hampshire, 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 Nashua, New Hampshire is updated on an hourly basis.
The worst air quality in Nashua, New Hampshire was recorded at 12:00:00 on 2025-12-13.
The best air quality in Nashua, New Hampshire was recorded at 12:00:00 on 2025-12-13.
The real-time air quality index in Nashua, New Hampshire is 27, currently categorized as Good.
The most common pollutant in Nashua, New Hampshire is PM2.5.
If the air quality in Nashua, New Hampshire is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Nashua, New Hampshire at present are 5.123 μg/m3.
The current PM10 levels in Nashua, New Hampshire are 22.607 μg/m3.
The current carbon monoxide (CO) level in Nashua, New Hampshire is 0.222 ppm.
The current sulfur dioxide (SO2) levels in Nashua, New Hampshire are 0.561 ppb.
The current ozone (O3) levels at Nashua, New Hampshire is 27.085 ppm.
The current nitrogen dioxide (NO2) levels at Nashua, New Hampshire is 7.444 ppb.
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