Stay updated with real-time air quality in Portsmouth, Rhode Island 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)
56
Moderate
Portsmouth, Rhode Island
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
52.07 μg/m³
0
55
155
255
425
605+
40.11 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
5.47 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Portsmouth, Rhode Island
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AQI 54
Moderate
10.72μg/m³
PM2.5
47.31μg/m³
PM10
36.07ppb
O3
0.30ppb
SO2
3.38ppb
NO2
0.14ppm
CO
AQI 56
Moderate
11.80μg/m³
PM2.5
41.94μg/m³
PM10
36.38ppb
O3
0.37ppb
SO2
3.79ppb
NO2
0.15ppm
CO
AQI 52
Moderate
10.00μg/m³
PM2.5
44.22μg/m³
PM10
38.13ppb
O3
0.26ppb
SO2
3.68ppb
NO2
0.15ppm
CO
AQI 54
Moderate
11.49μg/m³
PM2.5
45.14μg/m³
PM10
33.79ppb
O3
0.32ppb
SO2
3.83ppb
NO2
0.15ppm
CO
AQI 54
Moderate
10.85μg/m³
PM2.5
47.78μg/m³
PM10
36.08ppb
O3
0.30ppb
SO2
3.35ppb
NO2
0.14ppm
CO
AQI 54
Moderate
10.77μg/m³
PM2.5
47.48μg/m³
PM10
36.15ppb
O3
0.30ppb
SO2
3.37ppb
NO2
0.14ppm
CO
Air quality data and pollutant measurements for Rhode Island, 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 Portsmouth, Rhode Island is updated every hour.
The worst air quality in Portsmouth, Rhode Island in the last 24 hours was observed at 05:00:00 on 2026-06-29.
In the last 24 hrs, the best air quality in Portsmouth, Rhode Island was observed at 05:00:00 on 2026-06-29.
The current air quality in Portsmouth, Rhode Island is 56, categorized as Moderate based on real-time data.
The most common pollutant in Portsmouth, Rhode Island is PM2.5.
If the air quality in Portsmouth, Rhode Island is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Portsmouth, Rhode Island is 11.675 μg/m3.
The current PM10 concentration at Portsmouth, Rhode Island is 52.068 μg/m3.
The current carbon monoxide (CO) concentration at Portsmouth, Rhode Island is 0.186 ppm.
The current sulfur dioxide (SO2) concentration at Portsmouth, Rhode Island is 0.336 ppb.
The current ozone (O3) concentration at Portsmouth, Rhode Island is 40.11 ppm.
The current nitrogen dioxide (NO2) concentration at Portsmouth, Rhode Island is 5.467 ppb.
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