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)
35
Good
New Castle, Indiana
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.52 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.75 μg/m³
0
55
155
255
425
605+
37.55 ppb
0
55
71
86
201
201+
0.77 ppb
0
36
76
186
605
1005+
4.48 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
New Castle, Indiana
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AQI 34
Good
5.10μg/m³
PM2.5
22.00μg/m³
PM10
37.14ppb
O3
0.78ppb
SO2
2.97ppb
NO2
0.15ppm
CO
AQI 33
Good
5.16μg/m³
PM2.5
20.75μg/m³
PM10
36.19ppb
O3
0.77ppb
SO2
2.87ppb
NO2
0.15ppm
CO
AQI 34
Good
4.76μg/m³
PM2.5
20.83μg/m³
PM10
36.90ppb
O3
0.74ppb
SO2
2.79ppb
NO2
0.15ppm
CO
AQI 31
Good
4.78μg/m³
PM2.5
14.28μg/m³
PM10
32.63ppb
O3
0.89ppb
SO2
5.69ppb
NO2
0.14ppm
CO
AQI 32
Good
4.30μg/m³
PM2.5
17.62μg/m³
PM10
35.20ppb
O3
0.67ppb
SO2
4.03ppb
NO2
0.15ppm
CO
AQI 31
Good
4.76μg/m³
PM2.5
18.36μg/m³
PM10
33.70ppb
O3
0.67ppb
SO2
5.63ppb
NO2
0.12ppm
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 05:00:00 on 2026-03-09.
The best air quality in New Castle, Indiana was recorded at 09:00:00 on 2026-03-09.
The real-time air quality index in New Castle, Indiana is 35, 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 4.522 μg/m3.
The current PM10 levels in New Castle, Indiana are 19.752 μg/m3.
The current carbon monoxide (CO) level in New Castle, Indiana is 0.145 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 37.548 ppm.
The current nitrogen dioxide (NO2) levels at New Castle, Indiana is 4.477 ppb.
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