Stay updated with real-time air quality in Westfield, Indiana 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)
39
Good
Westfield, Indiana
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.97 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.31 μg/m³
0
55
155
255
425
605+
41.58 ppb
0
55
71
86
201
201+
1.19 ppb
0
36
76
186
605
1005+
7.78 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westfield, Indiana
Westfield, Indiana
Scroll To Air Quality MapLoading...
AQI 40
Good
5.00μg/m³
PM2.5
21.06μg/m³
PM10
42.68ppb
O3
0.90ppb
SO2
7.78ppb
NO2
0.17ppm
CO
AQI 40
Good
4.91μg/m³
PM2.5
21.42μg/m³
PM10
42.91ppb
O3
1.21ppb
SO2
7.81ppb
NO2
0.15ppm
CO
AQI 39
Good
4.66μg/m³
PM2.5
19.62μg/m³
PM10
41.83ppb
O3
1.09ppb
SO2
7.81ppb
NO2
0.15ppm
CO
AQI 36
Good
4.77μg/m³
PM2.5
19.71μg/m³
PM10
39.48ppb
O3
0.88ppb
SO2
7.76ppb
NO2
0.17ppm
CO
AQI 41
Good
4.69μg/m³
PM2.5
20.87μg/m³
PM10
44.02ppb
O3
0.71ppb
SO2
7.74ppb
NO2
0.17ppm
CO
AQI 39
Good
4.46μg/m³
PM2.5
19.31μg/m³
PM10
41.77ppb
O3
1.13ppb
SO2
7.81ppb
NO2
0.15ppm
CO
Air quality and pollutant data for Indiana, 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 Westfield, Indiana is updated every hour for accuracy.
In the past 24 hours, the air quality in Westfield, Indiana was at its worst at 05:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Westfield, Indiana was observed at 03:00:00 on 2026-07-23.
As of now, the AQI in Westfield, Indiana is 39, indicating Good conditions.
Westfield, Indiana air has the highest levels of O3.
Poor air quality in Westfield, Indiana means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Westfield, Indiana are currently 4.971 μg/m3.
The PM10 concentration in Westfield, Indiana is 21.309 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Westfield, Indiana is 0.166 ppm.
Currently, Westfield, Indiana has a sulfur dioxide (SO2) concentration of 1.193 ppb.
The current ozone (O3) level in Westfield, Indiana at the moment is 41.579 ppm.
Nitrogen dioxide (NO2) level in Westfield, Indiana at the moment is 7.782 ppb.
All Rights Reserved © Ambee Inc. 2025