Stay updated with real-time air quality in New Castle, Indiana 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)
29
Good
New Castle, Indiana
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.53 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.71 μg/m³
0
55
155
255
425
605+
30.67 ppb
0
55
71
86
201
201+
1.77 ppb
0
36
76
186
605
1005+
11.05 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
New Castle, Indiana
New Castle, Indiana
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AQI 29
Good
3.40μg/m³
PM2.5
15.01μg/m³
PM10
31.22ppb
O3
2.00ppb
SO2
9.01ppb
NO2
0.28ppm
CO
AQI 29
Good
3.39μg/m³
PM2.5
14.96μg/m³
PM10
30.81ppb
O3
1.81ppb
SO2
8.72ppb
NO2
0.28ppm
CO
AQI 28
Good
3.41μg/m³
PM2.5
15.12μg/m³
PM10
30.07ppb
O3
1.74ppb
SO2
8.27ppb
NO2
0.28ppm
CO
AQI 28
Good
3.67μg/m³
PM2.5
13.86μg/m³
PM10
30.41ppb
O3
1.69ppb
SO2
11.88ppb
NO2
0.30ppm
CO
AQI 27
Good
3.58μg/m³
PM2.5
14.78μg/m³
PM10
29.00ppb
O3
1.61ppb
SO2
9.37ppb
NO2
0.28ppm
CO
AQI 29
Good
3.44μg/m³
PM2.5
15.01μg/m³
PM10
31.00ppb
O3
1.96ppb
SO2
10.34ppb
NO2
0.29ppm
CO
Air quality measurements for Indiana, 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 New Castle, Indiana is updated on an hourly basis.
The worst air quality in New Castle, Indiana was recorded at 12:00:00 on 2026-01-23.
The best air quality in New Castle, Indiana was recorded at 05:00:00 on 2026-01-23.
The real-time air quality index in New Castle, Indiana is 29, currently categorized as Good.
The most common pollutant in New Castle, Indiana is O3.
If the air quality in New Castle, Indiana is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in New Castle, Indiana at present are 3.526 μg/m3.
The current PM10 levels in New Castle, Indiana are 20.707 μg/m3.
The current carbon monoxide (CO) level in New Castle, Indiana is 0.285 ppm.
The current sulfur dioxide (SO2) levels in New Castle, Indiana are 1.774 ppb.
The current ozone (O3) levels at New Castle, Indiana is 30.666 ppm.
The current nitrogen dioxide (NO2) levels at New Castle, Indiana is 11.049 ppb.
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