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)
73
Moderate
New Castle, Indiana
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
20.99 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
68.61 μg/m³
0
55
155
255
425
605+
15.28 ppb
0
55
71
86
201
201+
0.77 ppb
0
36
76
186
605
1005+
7.83 ppb
0
54
101
361
1250
2050+
0.25 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 77
Moderate
22.80μg/m³
PM2.5
100.98μg/m³
PM10
15.83ppb
O3
0.80ppb
SO2
9.56ppb
NO2
0.25ppm
CO
AQI 75
Moderate
21.95μg/m³
PM2.5
93.09μg/m³
PM10
15.22ppb
O3
0.77ppb
SO2
9.20ppb
NO2
0.25ppm
CO
AQI 73
Moderate
21.01μg/m³
PM2.5
93.37μg/m³
PM10
16.75ppb
O3
0.64ppb
SO2
9.19ppb
NO2
0.26ppm
CO
AQI 69
Moderate
19.32μg/m³
PM2.5
57.29μg/m³
PM10
9.59ppb
O3
0.78ppb
SO2
7.83ppb
NO2
0.25ppm
CO
AQI 75
Moderate
21.68μg/m³
PM2.5
92.35μg/m³
PM10
10.98ppb
O3
0.39ppb
SO2
9.52ppb
NO2
0.26ppm
CO
AQI 71
Moderate
19.79μg/m³
PM2.5
75.75μg/m³
PM10
11.43ppb
O3
0.59ppb
SO2
9.81ppb
NO2
0.23ppm
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 07:00:00 on 2025-12-07.
The best air quality in New Castle, Indiana was recorded at 05:00:00 on 2025-12-06.
The real-time air quality index in New Castle, Indiana is 73, currently categorized as Moderate.
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 20.99 μg/m3.
The current PM10 levels in New Castle, Indiana are 68.608 μg/m3.
The current carbon monoxide (CO) level in New Castle, Indiana is 0.253 ppm.
The current sulfur dioxide (SO2) levels in New Castle, Indiana are 0.77 ppb.
The current ozone (O3) levels at New Castle, Indiana is 15.28 ppm.
The current nitrogen dioxide (NO2) levels at New Castle, Indiana is 7.832 ppb.
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