Bad Air Days in Victoria County, Texas: under 1 a Year

under 1 bad air days a year

Rare: among the cleanest-air counties EPA monitors. Ranked 837 of 996 monitored counties, where 1 is worst.

What makes them bad: mostly ozone: summer smog (0% particle days).

When the bad days come in Victoria

Most bad days here fall in August and September. Averaged over 2016 to 2025.

Is a purifier worth it here?

Bad air days are rare here. A standard furnace filter is enough; no purifier needed for outdoor air.
On the odd bad day, check AirNow and keep windows shut.

The record for Victoria

In 2000 to 2009 this county averaged 6 bad days a year; in 2016 to 2025, under 1. The air has improved. The worst recent year was 2018, with 2 bad days on 279 monitored days.

Date	AQI	Main pollutant
2018-08-01	112	Ozone
2024-09-28	105	Ozone
2024-09-29	105	Ozone
2018-08-02	101	Ozone
2020-06-12	100	Ozone

The air on a normal day

Across 3,442 monitored days from 2016 to 2025, the air in Victoria County rated Good on 94% of them, more often than the 72% typical of monitored counties, and Moderate on 6%. The median day sat at AQI 32; one day in ten went above 47.

The pollutant setting the AQI on an ordinary day here:

ozone100%3,442 days

Victoria County by year

Year	Days monitored	Good	Moderate	Over 100	Median AQI	Highest AQI
2025*	360	312	48	0	34	100
2024	355	324	29	2	35	105
2023	356	345	11	0	31	74
2022	354	342	12	0	30	74
2021	364	347	17	0	32	97
2020	329	308	21	0	31	100
2019	341	319	22	0	31	87
2018	279	270	7	2	28	112
2017	356	332	24	0	33	93
2016	348	328	20	0	33	90
2015	357	323	33	1	32	105
2014	358	340	18	0	30	93
2013	336	320	16	0	31	80
2012	348	319	29	0	31	100
2011	327	286	37	4	32	133
2010	351	320	29	2	32	112

*2025 may be a partial year in EPA's file.

Texas compared

How this is counted

A bad air day is a day the county's daily AQI from EPA AirData went above 100, the level where EPA tells children, older adults and people with asthma or heart disease to cut back outdoors. Monitors do not run every day, so yearly counts are scaled to 365 days. This is the record, not today's air: for that, check AirNow. More on the method in how the county numbers are made, on the AQI 100 line in what counts as a bad air day, and on why a purifier does not touch ozone in smoke vs ozone.