Stay updated with real-time air quality in New Castle City, Pennsylvania 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)
41
Good
New Castle City, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.54 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.06 μg/m³
0
55
155
255
425
605+
43.99 ppb
0
55
71
86
201
201+
1.09 ppb
0
36
76
186
605
1005+
2.14 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
New Castle City, Pennsylvania
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AQI 38
Good
2.44μg/m³
PM2.5
7.15μg/m³
PM10
40.66ppb
O3
1.08ppb
SO2
1.96ppb
NO2
0.20ppm
CO
AQI 40
Good
2.39μg/m³
PM2.5
9.72μg/m³
PM10
42.91ppb
O3
1.16ppb
SO2
1.97ppb
NO2
0.20ppm
CO
AQI 39
Good
2.20μg/m³
PM2.5
4.05μg/m³
PM10
42.00ppb
O3
1.19ppb
SO2
2.05ppb
NO2
0.20ppm
CO
AQI 40
Good
2.40μg/m³
PM2.5
9.84μg/m³
PM10
42.95ppb
O3
1.16ppb
SO2
1.97ppb
NO2
0.20ppm
CO
AQI 36
Good
2.30μg/m³
PM2.5
7.33μg/m³
PM10
39.37ppb
O3
1.23ppb
SO2
2.09ppb
NO2
0.21ppm
CO
AQI 38
Good
2.28μg/m³
PM2.5
8.50μg/m³
PM10
40.73ppb
O3
0.97ppb
SO2
1.94ppb
NO2
0.20ppm
CO
The air quality data for Pennsylvania, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for New Castle City, Pennsylvania are available every hour.
New Castle City, Pennsylvania experienced its worst air quality at 01:00:00, 2026-03-14.
The best air quality in New Castle City, Pennsylvania was observed at 02:00:00 on 2026-03-14.
The air quality in New Castle City, Pennsylvania right now is Good, with an AQI of 41.
In New Castle City, Pennsylvania, O3 is the most frequently found pollutant.
When air quality in New Castle City, Pennsylvania is compromised, staying indoors and wearing a mask can reduce health risks.
New Castle City, Pennsylvania currently has a PM2.5 concentration of 2.539 μg/m3.
New Castle City, Pennsylvania currently has a PM10 concentration of 9.059 μg/m3.
The current carbon monoxide (CO) level in New Castle City, Pennsylvania is 0.218 ppm.
The current sulfur dioxide (SO2) concentration in New Castle City, Pennsylvania is 1.095 ppb.
New Castle City, Pennsylvania currently has an ozone (O3) concentration of 43.993 ppm.
The current level of nitrogen dioxide (NO2) in New Castle City, Pennsylvania is 2.14 ppb.
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