Stay updated with real-time air quality in Katy, Texas 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)
33
Good
Katy, Texas
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
24.27 μg/m³
0
55
155
255
425
605+
23.73 ppb
0
55
71
86
201
201+
0.96 ppb
0
36
76
186
605
1005+
3.83 ppb
0
54
101
361
1250
2050+
0.36 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Katy, Texas
Katy, Texas
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AQI 27
Good
5.31μg/m³
PM2.5
23.59μg/m³
PM10
23.88ppb
O3
0.97ppb
SO2
4.96ppb
NO2
0.36ppm
CO
AQI 27
Good
5.47μg/m³
PM2.5
25.89μg/m³
PM10
23.85ppb
O3
0.96ppb
SO2
3.73ppb
NO2
0.36ppm
CO
AQI 27
Good
5.08μg/m³
PM2.5
22.44μg/m³
PM10
23.87ppb
O3
0.97ppb
SO2
5.00ppb
NO2
0.36ppm
CO
AQI 27
Good
5.08μg/m³
PM2.5
22.44μg/m³
PM10
23.87ppb
O3
0.97ppb
SO2
5.00ppb
NO2
0.36ppm
CO
AQI 27
Good
5.33μg/m³
PM2.5
23.81μg/m³
PM10
23.46ppb
O3
0.97ppb
SO2
4.91ppb
NO2
0.36ppm
CO
AQI 33
Good
5.76μg/m³
PM2.5
28.00μg/m³
PM10
21.24ppb
O3
0.97ppb
SO2
3.82ppb
NO2
0.36ppm
CO
Air quality and pollutant data for Texas, 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 Katy, Texas is updated every hour for accuracy.
In the past 24 hours, the air quality in Katy, Texas was at its worst at 11:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in Katy, Texas was observed at 02:00:00 on 2026-04-23.
As of now, the AQI in Katy, Texas is 33, indicating Good conditions.
Katy, Texas air has the highest levels of PM2.5.
Poor air quality in Katy, Texas means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Katy, Texas are currently 5.709 μg/m3.
The PM10 concentration in Katy, Texas is 24.265 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Katy, Texas is 0.365 ppm.
Currently, Katy, Texas has a sulfur dioxide (SO2) concentration of 0.96 ppb.
The current ozone (O3) level in Katy, Texas at the moment is 23.733 ppm.
Nitrogen dioxide (NO2) level in Katy, Texas at the moment is 3.826 ppb.
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