Galveston, Texas Air Quality

Galveston County, Texas (TX)

↑ Worseningover 10 years

Air Quality Grade

55/100

Current Median AQI

Moderate

5-Year Avg AQI

10-Year Change

Worse

Unhealthy Days/yr

5-year average

Ozone

Primary Pollutant

Ground-Level Ozone

10-Year AQI Trend

The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). Air quality in this area has been declining over the past decade.

Air Quality Day Breakdown

Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).

Year-by-Year Data

Year	Median AQI	90th Pct	Max AQI	Good Days	Moderate	Unhealthy+	Pollutant
2023	51	74	159	177	164	21	PM2.5
2022	46	66	159	236	122	7	Ozone
2021	43	63	122	259	99	3	Ozone
2020	44	66	143	238	119	3	Ozone
2019	43	63	136	247	107	8	Ozone
2018	34	59	202	306	48	10	Ozone
2017	41	64	143	265	85	6	Ozone
2016	44	67	147	256	103	6	Ozone
2015	44	74	190	255	92	18	Ozone
2014	43	62	119	247	114	4	Ozone

What This Means for Galveston County Residents

Galveston, Texas has received an Air Quality Grade of C (55/100) based on a decade of EPA monitoring data. The current median AQI of 51 falls in the "Moderate" range.

Concerning trends show air quality has been declining, with the median AQI rising by 8 points over the monitoring period. This could be driven by increased development, wildfire smoke, or industrial activity.

The primary pollutant affecting this area is Ground-Level Ozone. Over the past 5 years, this area has averaged 8 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.