Stay updated with real-time air quality in Newcastle, Washington 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)
22
Good
Newcastle, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.61 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
6.65 μg/m³
0
55
155
255
425
605+
23.97 ppb
0
55
71
86
201
201+
0.32 ppb
0
36
76
186
605
1005+
6.43 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Newcastle, Washington
Scroll To Air Quality MapLoading...
AQI 49
Good
8.63μg/m³
PM2.5
32.59μg/m³
PM10
12.62ppb
O3
0.23ppb
SO2
7.23ppb
NO2
0.20ppm
CO
AQI 44
Good
7.51μg/m³
PM2.5
30.52μg/m³
PM10
13.02ppb
O3
0.23ppb
SO2
7.71ppb
NO2
0.20ppm
CO
AQI 49
Good
8.66μg/m³
PM2.5
33.51μg/m³
PM10
12.20ppb
O3
0.23ppb
SO2
8.45ppb
NO2
0.20ppm
CO
AQI 49
Good
8.58μg/m³
PM2.5
34.05μg/m³
PM10
12.17ppb
O3
0.23ppb
SO2
8.41ppb
NO2
0.20ppm
CO
AQI 38
Good
7.43μg/m³
PM2.5
29.92μg/m³
PM10
13.33ppb
O3
0.23ppb
SO2
7.47ppb
NO2
0.20ppm
CO
AQI 38
Good
7.26μg/m³
PM2.5
29.67μg/m³
PM10
13.22ppb
O3
0.24ppb
SO2
7.69ppb
NO2
0.19ppm
CO
Air quality and pollutant data for Washington, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Newcastle, Washington is updated every hour for accuracy.
In the past 24 hours, the air quality in Newcastle, Washington was at its worst at 03:00:00 on 2025-10-24.
In the last 24 hours, the best air quality in Newcastle, Washington was observed at 12:00:00 on 2025-10-24.
As of now, the AQI in Newcastle, Washington is 38, indicating Good conditions.
Newcastle, Washington air has the highest levels of PM2.5.
Poor air quality in Newcastle, Washington means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Newcastle, Washington are currently 6.749 μg/m3.
The PM10 concentration in Newcastle, Washington is 27.837 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Newcastle, Washington is 0.194 ppm.
Currently, Newcastle, Washington has a sulfur dioxide (SO2) concentration of 0.316 ppb.
The current ozone (O3) level in Newcastle, Washington at the moment is 13.062 ppm.
Nitrogen dioxide (NO2) level in Newcastle, Washington at the moment is 14.812 ppb.
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