Stay updated with real-time air quality in Dover, 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)
43
Good
Dover, New Hampshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.03 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.85 μg/m³
0
55
155
255
425
605+
45.91 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
7.68 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Dover, New Hampshire
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AQI 41
Good
3.91μg/m³
PM2.5
13.16μg/m³
PM10
44.13ppb
O3
0.64ppb
SO2
7.67ppb
NO2
0.18ppm
CO
AQI 42
Good
2.88μg/m³
PM2.5
7.54μg/m³
PM10
44.73ppb
O3
0.67ppb
SO2
7.01ppb
NO2
0.18ppm
CO
AQI 42
Good
3.91μg/m³
PM2.5
15.02μg/m³
PM10
44.65ppb
O3
0.62ppb
SO2
7.34ppb
NO2
0.18ppm
CO
AQI 40
Good
4.11μg/m³
PM2.5
9.02μg/m³
PM10
43.28ppb
O3
0.79ppb
SO2
7.51ppb
NO2
0.18ppm
CO
AQI 40
Good
4.13μg/m³
PM2.5
9.02μg/m³
PM10
43.21ppb
O3
0.80ppb
SO2
7.50ppb
NO2
0.18ppm
CO
AQI 42
Good
3.79μg/m³
PM2.5
9.95μg/m³
PM10
44.55ppb
O3
0.73ppb
SO2
7.96ppb
NO2
0.18ppm
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 Dover, New Hampshire is updated on an hourly basis.
The worst air quality in Dover, New Hampshire was recorded at 09:00:00 on 2026-03-29.
The best air quality in Dover, New Hampshire was recorded at 03:00:00 on 2026-03-29.
The real-time air quality index in Dover, New Hampshire is 42, currently categorized as Good.
The most common pollutant in Dover, New Hampshire is O3.
If the air quality in Dover, New Hampshire is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Dover, New Hampshire at present are 3.033 μg/m3.
The current PM10 levels in Dover, New Hampshire are 11.158 μg/m3.
The current carbon monoxide (CO) level in Dover, New Hampshire is 0.181 ppm.
The current sulfur dioxide (SO2) levels in Dover, New Hampshire are 0.652 ppb.
The current ozone (O3) levels at Dover, New Hampshire is 44.582 ppm.
The current nitrogen dioxide (NO2) levels at Dover, New Hampshire is 7.457 ppb.
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