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)
37
Good
Dover, New Hampshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
25.21 μg/m³
0
55
155
255
425
605+
39.77 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
2.05 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Dover, New Hampshire
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AQI 39
Good
6.28μg/m³
PM2.5
25.75μg/m³
PM10
41.79ppb
O3
0.86ppb
SO2
9.81ppb
NO2
0.27ppm
CO
AQI 38
Good
5.89μg/m³
PM2.5
25.65μg/m³
PM10
41.42ppb
O3
0.90ppb
SO2
8.84ppb
NO2
0.27ppm
CO
AQI 52
Moderate
9.58μg/m³
PM2.5
22.64μg/m³
PM10
42.38ppb
O3
0.83ppb
SO2
9.18ppb
NO2
0.26ppm
CO
AQI 45
Good
8.44μg/m³
PM2.5
14.09μg/m³
PM10
49.44ppb
O3
1.09ppb
SO2
9.84ppb
NO2
0.29ppm
CO
AQI 46
Good
8.45μg/m³
PM2.5
14.06μg/m³
PM10
49.58ppb
O3
1.09ppb
SO2
9.83ppb
NO2
0.29ppm
CO
AQI 44
Good
7.86μg/m³
PM2.5
16.42μg/m³
PM10
44.94ppb
O3
0.99ppb
SO2
10.22ppb
NO2
0.28ppm
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 11:00:00 on 2026-08-07.
The best air quality in Dover, New Hampshire was recorded at 03:00:00 on 2026-08-07.
The real-time air quality index in Dover, New Hampshire is 40, 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 5.826 μg/m3.
The current PM10 levels in Dover, New Hampshire are 24.191 μg/m3.
The current carbon monoxide (CO) level in Dover, New Hampshire is 0.268 ppm.
The current sulfur dioxide (SO2) levels in Dover, New Hampshire are 0.874 ppb.
The current ozone (O3) levels at Dover, New Hampshire is 43.491 ppm.
The current nitrogen dioxide (NO2) levels at Dover, New Hampshire is 9.505 ppb.
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