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)
49
Good
New Castle, Indiana
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
26.13 μg/m³
0
55
155
255
425
605+
24.84 ppb
0
55
71
86
201
201+
0.95 ppb
0
36
76
186
605
1005+
7.39 ppb
0
54
101
361
1250
2050+
0.23 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 38
Good
7.41μg/m³
PM2.5
33.01μg/m³
PM10
24.52ppb
O3
0.99ppb
SO2
6.26ppb
NO2
0.22ppm
CO
AQI 44
Good
7.96μg/m³
PM2.5
26.75μg/m³
PM10
24.96ppb
O3
0.95ppb
SO2
6.07ppb
NO2
0.23ppm
CO
AQI 44
Good
7.95μg/m³
PM2.5
34.98μg/m³
PM10
25.00ppb
O3
0.93ppb
SO2
5.57ppb
NO2
0.24ppm
CO
AQI 52
Moderate
9.55μg/m³
PM2.5
28.61μg/m³
PM10
27.80ppb
O3
1.02ppb
SO2
7.89ppb
NO2
0.21ppm
CO
AQI 44
Good
7.59μg/m³
PM2.5
26.03μg/m³
PM10
33.61ppb
O3
0.90ppb
SO2
4.89ppb
NO2
0.25ppm
CO
AQI 44
Good
8.18μg/m³
PM2.5
29.12μg/m³
PM10
27.80ppb
O3
1.08ppb
SO2
8.14ppb
NO2
0.17ppm
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 06:00:00 on 2026-06-07.
The best air quality in New Castle, Indiana was recorded at 04:00:00 on 2026-06-08.
The real-time air quality index in New Castle, Indiana is 49, currently categorized as Good.
The most common pollutant in New Castle, Indiana is PM2.5.
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 8.679 μg/m3.
The current PM10 levels in New Castle, Indiana are 26.128 μg/m3.
The current carbon monoxide (CO) level in New Castle, Indiana is 0.23 ppm.
The current sulfur dioxide (SO2) levels in New Castle, Indiana are 0.949 ppb.
The current ozone (O3) levels at New Castle, Indiana is 24.836 ppm.
The current nitrogen dioxide (NO2) levels at New Castle, Indiana is 7.392 ppb.
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