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)
52
Moderate
New Castle, Indiana
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.91 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
30.32 μg/m³
0
55
155
255
425
605+
36.31 ppb
0
55
71
86
201
201+
1.31 ppb
0
36
76
186
605
1005+
3.47 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
New Castle, Indiana
New Castle, Indiana
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AQI 52
Moderate
10.39μg/m³
PM2.5
45.96μg/m³
PM10
39.15ppb
O3
1.69ppb
SO2
4.23ppb
NO2
0.20ppm
CO
AQI 49
Good
8.96μg/m³
PM2.5
34.50μg/m³
PM10
36.87ppb
O3
1.66ppb
SO2
4.19ppb
NO2
0.20ppm
CO
AQI 49
Good
8.64μg/m³
PM2.5
38.16μg/m³
PM10
36.29ppb
O3
1.63ppb
SO2
4.11ppb
NO2
0.21ppm
CO
AQI 38
Good
6.88μg/m³
PM2.5
19.66μg/m³
PM10
41.31ppb
O3
1.67ppb
SO2
4.39ppb
NO2
0.21ppm
CO
AQI 49
Good
8.61μg/m³
PM2.5
31.37μg/m³
PM10
38.82ppb
O3
1.55ppb
SO2
4.02ppb
NO2
0.21ppm
CO
AQI 44
Good
7.79μg/m³
PM2.5
22.59μg/m³
PM10
41.65ppb
O3
1.84ppb
SO2
4.49ppb
NO2
0.16ppm
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 2026-09-13.
The best air quality in New Castle, Indiana was recorded at 03:00:00 on 2026-09-13.
The real-time air quality index in New Castle, Indiana is 52, 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 9.84 μg/m3.
The current PM10 levels in New Castle, Indiana are 37.633 μg/m3.
The current carbon monoxide (CO) level in New Castle, Indiana is 0.203 ppm.
The current sulfur dioxide (SO2) levels in New Castle, Indiana are 1.671 ppb.
The current ozone (O3) levels at New Castle, Indiana is 38.21 ppm.
The current nitrogen dioxide (NO2) levels at New Castle, Indiana is 4.252 ppb.
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