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
3.92 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.36 μg/m³
0
55
155
255
425
605+
23.80 ppb
0
55
71
86
201
201+
0.30 ppb
0
36
76
186
605
1005+
18.21 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Newcastle, Washington
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AQI 30
Good
5.07μg/m³
PM2.5
18.43μg/m³
PM10
32.27ppb
O3
0.22ppb
SO2
13.77ppb
NO2
0.20ppm
CO
AQI 30
Good
4.01μg/m³
PM2.5
16.61μg/m³
PM10
31.80ppb
O3
0.23ppb
SO2
14.43ppb
NO2
0.20ppm
CO
AQI 28
Good
4.14μg/m³
PM2.5
18.11μg/m³
PM10
29.56ppb
O3
0.23ppb
SO2
13.33ppb
NO2
0.20ppm
CO
AQI 27
Good
4.28μg/m³
PM2.5
18.10μg/m³
PM10
29.34ppb
O3
0.22ppb
SO2
13.16ppb
NO2
0.20ppm
CO
AQI 31
Good
4.51μg/m³
PM2.5
17.71μg/m³
PM10
33.35ppb
O3
0.23ppb
SO2
14.50ppb
NO2
0.20ppm
CO
AQI 30
Good
4.04μg/m³
PM2.5
16.60μg/m³
PM10
32.41ppb
O3
0.23ppb
SO2
14.63ppb
NO2
0.20ppm
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 08:00:00 on 2026-04-19.
In the last 24 hours, the best air quality in Newcastle, Washington was observed at 05:00:00 on 2026-04-19.
As of now, the AQI in Newcastle, Washington is 22, indicating Good conditions.
Newcastle, Washington air has the highest levels of O3.
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 3.916 μg/m3.
The PM10 concentration in Newcastle, Washington is 16.355 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Newcastle, Washington is 0.209 ppm.
Currently, Newcastle, Washington has a sulfur dioxide (SO2) concentration of 0.298 ppb.
The current ozone (O3) level in Newcastle, Washington at the moment is 23.803 ppm.
Nitrogen dioxide (NO2) level in Newcastle, Washington at the moment is 18.21 ppb.
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