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)
34
Good
Newcastle, Washington
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.94 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
7.90 μg/m³
0
55
155
255
425
605+
36.80 ppb
0
55
71
86
201
201+
0.16 ppb
0
36
76
186
605
1005+
7.44 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 32
Good
2.81μg/m³
PM2.5
10.77μg/m³
PM10
34.61ppb
O3
0.14ppb
SO2
9.14ppb
NO2
0.18ppm
CO
AQI 31
Good
2.17μg/m³
PM2.5
8.21μg/m³
PM10
33.64ppb
O3
0.14ppb
SO2
8.29ppb
NO2
0.17ppm
CO
AQI 31
Good
2.73μg/m³
PM2.5
10.84μg/m³
PM10
34.08ppb
O3
0.14ppb
SO2
8.40ppb
NO2
0.17ppm
CO
AQI 31
Good
2.56μg/m³
PM2.5
10.27μg/m³
PM10
34.32ppb
O3
0.14ppb
SO2
8.38ppb
NO2
0.17ppm
CO
AQI 31
Good
2.22μg/m³
PM2.5
8.68μg/m³
PM10
33.78ppb
O3
0.14ppb
SO2
8.83ppb
NO2
0.18ppm
CO
AQI 31
Good
2.04μg/m³
PM2.5
7.74μg/m³
PM10
33.55ppb
O3
0.14ppb
SO2
8.27ppb
NO2
0.17ppm
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 2026-03-10.
In the last 24 hours, the best air quality in Newcastle, Washington was observed at 02:00:00 on 2026-03-10.
As of now, the AQI in Newcastle, Washington is 34, 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 1.941 μg/m3.
The PM10 concentration in Newcastle, Washington is 7.903 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Newcastle, Washington is 0.182 ppm.
Currently, Newcastle, Washington has a sulfur dioxide (SO2) concentration of 0.156 ppb.
The current ozone (O3) level in Newcastle, Washington at the moment is 36.796 ppm.
Nitrogen dioxide (NO2) level in Newcastle, Washington at the moment is 7.441 ppb.
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