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)
20
Good
Dover, New Hampshire
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
0.60 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
2.49 μg/m³
0
55
155
255
425
605+
22.36 ppb
0
55
71
86
201
201+
0.88 ppb
0
36
76
186
605
1005+
1.80 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Dover, New Hampshire
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AQI 21
Good
0.58μg/m³
PM2.5
5.09μg/m³
PM10
22.64ppb
O3
0.86ppb
SO2
1.80ppb
NO2
0.19ppm
CO
AQI 20
Good
0.64μg/m³
PM2.5
1.87μg/m³
PM10
21.84ppb
O3
0.90ppb
SO2
1.78ppb
NO2
0.19ppm
CO
AQI 20
Good
0.65μg/m³
PM2.5
4.07μg/m³
PM10
21.70ppb
O3
0.82ppb
SO2
1.80ppb
NO2
0.19ppm
CO
AQI 21
Good
0.80μg/m³
PM2.5
2.06μg/m³
PM10
23.08ppb
O3
1.09ppb
SO2
1.80ppb
NO2
0.20ppm
CO
AQI 21
Good
0.80μg/m³
PM2.5
2.04μg/m³
PM10
23.06ppb
O3
1.09ppb
SO2
1.80ppb
NO2
0.20ppm
CO
AQI 21
Good
0.79μg/m³
PM2.5
2.35μg/m³
PM10
22.83ppb
O3
0.99ppb
SO2
1.83ppb
NO2
0.20ppm
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 2026-09-27.
The best air quality in Dover, New Hampshire was recorded at 09:00:00 on 2026-09-28.
The real-time air quality index in Dover, New Hampshire is 20, 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 0.598 μg/m3.
The current PM10 levels in Dover, New Hampshire are 2.486 μg/m3.
The current carbon monoxide (CO) level in Dover, New Hampshire is 0.19 ppm.
The current sulfur dioxide (SO2) levels in Dover, New Hampshire are 0.876 ppb.
The current ozone (O3) levels at Dover, New Hampshire is 22.361 ppm.
The current nitrogen dioxide (NO2) levels at Dover, New Hampshire is 1.799 ppb.
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