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)
44
Good
Londonderry, New Hampshire
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
8.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.09 μg/m³
0
55
155
255
425
605+
14.54 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
6.99 ppb
0
54
101
361
1250
2050+
0.29 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 36
Good
3.66μg/m³
PM2.5
12.41μg/m³
PM10
38.89ppb
O3
0.31ppb
SO2
5.79ppb
NO2
0.12ppm
CO
AQI 37
Good
3.81μg/m³
PM2.5
14.08μg/m³
PM10
39.95ppb
O3
0.32ppb
SO2
6.52ppb
NO2
0.13ppm
CO
AQI 40
Good
3.77μg/m³
PM2.5
14.74μg/m³
PM10
42.66ppb
O3
0.27ppb
SO2
4.92ppb
NO2
0.13ppm
CO
AQI 35
Good
4.25μg/m³
PM2.5
16.00μg/m³
PM10
38.00ppb
O3
0.31ppb
SO2
5.90ppb
NO2
0.13ppm
CO
AQI 35
Good
4.32μg/m³
PM2.5
16.10μg/m³
PM10
37.80ppb
O3
0.30ppb
SO2
5.63ppb
NO2
0.13ppm
CO
AQI 39
Good
3.85μg/m³
PM2.5
15.76μg/m³
PM10
42.16ppb
O3
0.33ppb
SO2
6.17ppb
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 10:00:00 on 2025-07-23.
The best air quality in Londonderry, New Hampshire was recorded at 04:00:00 on 2025-07-23.
The real-time air quality index in Londonderry, New Hampshire is 34, 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 3.463 μg/m3.
The current PM10 levels in Londonderry, New Hampshire are 10.574 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 0.297 ppb.
The current ozone (O3) levels at Londonderry, New Hampshire is 37.346 ppm.
The current nitrogen dioxide (NO2) levels at Londonderry, New Hampshire is 5.345 ppb.
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