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

Good
Fine
Moderate
Poor
Very poor
Hazardous
0.64 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
1.87 μg/m³
0
55
155
255
425
605+
21.84 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
1.78 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Durham, New Hampshire
Durham, New Hampshire
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AQI 20
Good
0.60μg/m³
PM2.5
2.49μg/m³
PM10
22.36ppb
O3
0.88ppb
SO2
1.80ppb
NO2
0.19ppm
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
0.58μg/m³
PM2.5
5.09μg/m³
PM10
22.64ppb
O3
0.86ppb
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
0.48μg/m³
PM2.5
2.20μg/m³
PM10
22.88ppb
O3
0.90ppb
SO2
2.98ppb
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
Air quality data and pollutant measurements for New Hampshire, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Durham, New Hampshire is updated every hour.
The worst air quality in Durham, New Hampshire in the last 24 hours was observed at 11:00:00 on 2026-09-27.
In the last 24 hrs, the best air quality in Durham, New Hampshire was observed at 09:00:00 on 2026-09-28.
The current air quality in Durham, New Hampshire is 20, categorized as Good based on real-time data.
The most common pollutant in Durham, New Hampshire is O3.
If the air quality in Durham, New Hampshire is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Durham, New Hampshire is 0.644 μg/m3.
The current PM10 concentration at Durham, New Hampshire is 1.87 μg/m3.
The current carbon monoxide (CO) concentration at Durham, New Hampshire is 0.19 ppm.
The current sulfur dioxide (SO2) concentration at Durham, New Hampshire is 0.901 ppb.
The current ozone (O3) concentration at Durham, New Hampshire is 21.841 ppm.
The current nitrogen dioxide (NO2) concentration at Durham, New Hampshire is 1.785 ppb.
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