Stay updated with real-time air quality in Londonderry, 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)
24
Good
Londonderry, New Hampshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.59 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
7.49 μg/m³
0
55
155
255
425
605+
25.91 ppb
0
55
71
86
201
201+
1.26 ppb
0
36
76
186
605
1005+
0.53 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Londonderry, New Hampshire
Londonderry, New Hampshire
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AQI 22
Good
3.89μg/m³
PM2.5
9.73μg/m³
PM10
23.14ppb
O3
1.16ppb
SO2
0.88ppb
NO2
0.11ppm
CO
AQI 22
Good
3.85μg/m³
PM2.5
11.45μg/m³
PM10
22.53ppb
O3
1.04ppb
SO2
1.20ppb
NO2
0.12ppm
CO
AQI 22
Good
3.53μg/m³
PM2.5
12.16μg/m³
PM10
21.14ppb
O3
0.84ppb
SO2
1.17ppb
NO2
0.14ppm
CO
AQI 22
Good
3.88μg/m³
PM2.5
11.13μg/m³
PM10
20.16ppb
O3
0.90ppb
SO2
1.33ppb
NO2
0.14ppm
CO
AQI 22
Good
3.88μg/m³
PM2.5
10.62μg/m³
PM10
19.87ppb
O3
0.90ppb
SO2
1.28ppb
NO2
0.14ppm
CO
AQI 22
Good
3.81μg/m³
PM2.5
9.27μg/m³
PM10
22.12ppb
O3
0.96ppb
SO2
1.43ppb
NO2
0.14ppm
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 Londonderry, New Hampshire is updated on an hourly basis.
The worst air quality in Londonderry, New Hampshire was recorded at 05:00:00 on 2026-08-13.
The best air quality in Londonderry, New Hampshire was recorded at 04:00:00 on 2026-08-14.
The real-time air quality index in Londonderry, New Hampshire is 24, currently categorized as Good.
The most common pollutant in Londonderry, New Hampshire is O3.
If the air quality in Londonderry, New Hampshire is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Londonderry, New Hampshire at present are 3.586 μg/m3.
The current PM10 levels in Londonderry, New Hampshire are 7.493 μg/m3.
The current carbon monoxide (CO) level in Londonderry, New Hampshire is 0.104 ppm.
The current sulfur dioxide (SO2) levels in Londonderry, New Hampshire are 1.264 ppb.
The current ozone (O3) levels at Londonderry, New Hampshire is 25.914 ppm.
The current nitrogen dioxide (NO2) levels at Londonderry, New Hampshire is 0.53 ppb.
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