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
4.18 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.04 μg/m³
0
55
155
255
425
605+
12.00 ppb
0
55
71
86
201
201+
0.63 ppb
0
36
76
186
605
1005+
7.36 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Newcastle, Washington
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AQI 38
Good
6.63μg/m³
PM2.5
28.33μg/m³
PM10
12.92ppb
O3
0.70ppb
SO2
9.97ppb
NO2
0.24ppm
CO
AQI 38
Good
6.88μg/m³
PM2.5
29.77μg/m³
PM10
11.81ppb
O3
0.67ppb
SO2
10.21ppb
NO2
0.24ppm
CO
AQI 49
Good
9.10μg/m³
PM2.5
40.09μg/m³
PM10
12.49ppb
O3
0.70ppb
SO2
10.51ppb
NO2
0.24ppm
CO
AQI 49
Good
9.22μg/m³
PM2.5
40.65μg/m³
PM10
12.52ppb
O3
0.71ppb
SO2
10.49ppb
NO2
0.24ppm
CO
AQI 33
Good
5.61μg/m³
PM2.5
24.00μg/m³
PM10
11.57ppb
O3
0.66ppb
SO2
10.29ppb
NO2
0.24ppm
CO
AQI 33
Good
6.39μg/m³
PM2.5
27.54μg/m³
PM10
11.58ppb
O3
0.66ppb
SO2
10.18ppb
NO2
0.24ppm
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 2026-10-22.
In the last 24 hours, the best air quality in Newcastle, Washington was observed at 07:00:00 on 2026-10-22.
As of now, the AQI in Newcastle, Washington is 22, 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 4.176 μg/m3.
The PM10 concentration in Newcastle, Washington is 18.036 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Newcastle, Washington is 0.153 ppm.
Currently, Newcastle, Washington has a sulfur dioxide (SO2) concentration of 0.628 ppb.
The current ozone (O3) level in Newcastle, Washington at the moment is 11.997 ppm.
Nitrogen dioxide (NO2) level in Newcastle, Washington at the moment is 7.355 ppb.
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