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)
56
Moderate
Nashua, New Hampshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
12.50 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
44.64 μg/m³
0
55
155
255
425
605+
37.61 ppb
0
55
71
86
201
201+
0.86 ppb
0
36
76
186
605
1005+
1.65 ppb
0
54
101
361
1250
2050+
0.11 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 56
Moderate
12.37μg/m³
PM2.5
34.51μg/m³
PM10
36.11ppb
O3
0.84ppb
SO2
2.83ppb
NO2
0.11ppm
CO
AQI 56
Moderate
11.91μg/m³
PM2.5
38.92μg/m³
PM10
34.92ppb
O3
0.81ppb
SO2
3.79ppb
NO2
0.12ppm
CO
AQI 56
Moderate
12.03μg/m³
PM2.5
38.65μg/m³
PM10
34.62ppb
O3
0.79ppb
SO2
2.59ppb
NO2
0.11ppm
CO
AQI 56
Moderate
11.97μg/m³
PM2.5
38.75μg/m³
PM10
34.51ppb
O3
0.82ppb
SO2
2.59ppb
NO2
0.11ppm
CO
AQI 60
Moderate
13.54μg/m³
PM2.5
20.70μg/m³
PM10
38.67ppb
O3
1.08ppb
SO2
1.29ppb
NO2
0.10ppm
CO
AQI 56
Moderate
12.40μg/m³
PM2.5
35.04μg/m³
PM10
35.91ppb
O3
0.80ppb
SO2
2.93ppb
NO2
0.11ppm
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 05:00:00 on 2026-06-29.
The best air quality in Nashua, New Hampshire was recorded at 06:00:00 on 2026-06-29.
The real-time air quality index in Nashua, New Hampshire is 56, currently categorized as Moderate.
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 12.499 μg/m3.
The current PM10 levels in Nashua, New Hampshire are 44.636 μg/m3.
The current carbon monoxide (CO) level in Nashua, New Hampshire is 0.112 ppm.
The current sulfur dioxide (SO2) levels in Nashua, New Hampshire are 0.856 ppb.
The current ozone (O3) levels at Nashua, New Hampshire is 37.607 ppm.
The current nitrogen dioxide (NO2) levels at Nashua, New Hampshire is 1.653 ppb.
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