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)
27
Good
Newcastle, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.27 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
5.65 μg/m³
0
55
155
255
425
605+
29.36 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
3.99 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Newcastle, Washington
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AQI 24
Good
3.02μg/m³
PM2.5
12.94μg/m³
PM10
25.56ppb
O3
0.20ppb
SO2
4.47ppb
NO2
0.14ppm
CO
AQI 23
Good
2.31μg/m³
PM2.5
9.84μg/m³
PM10
24.86ppb
O3
0.20ppb
SO2
3.47ppb
NO2
0.14ppm
CO
AQI 24
Good
3.32μg/m³
PM2.5
14.56μg/m³
PM10
26.36ppb
O3
0.20ppb
SO2
3.65ppb
NO2
0.14ppm
CO
AQI 24
Good
3.41μg/m³
PM2.5
14.99μg/m³
PM10
26.08ppb
O3
0.20ppb
SO2
3.55ppb
NO2
0.14ppm
CO
AQI 22
Good
2.23μg/m³
PM2.5
9.25μg/m³
PM10
24.11ppb
O3
0.20ppb
SO2
3.91ppb
NO2
0.14ppm
CO
AQI 23
Good
2.08μg/m³
PM2.5
8.75μg/m³
PM10
24.51ppb
O3
0.20ppb
SO2
3.40ppb
NO2
0.14ppm
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 2026-03-05.
In the last 24 hours, the best air quality in Newcastle, Washington was observed at 06:00:00 on 2026-03-05.
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 1.953 μg/m3.
The PM10 concentration in Newcastle, Washington is 8.029 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Newcastle, Washington is 0.144 ppm.
Currently, Newcastle, Washington has a sulfur dioxide (SO2) concentration of 0.204 ppb.
The current ozone (O3) level in Newcastle, Washington at the moment is 23.769 ppm.
Nitrogen dioxide (NO2) level in Newcastle, Washington at the moment is 3.51 ppb.
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