SmogRank / Episodes / United States

Texas, United States, July 2023

For 2 days, from 26 to 27 July 2023, 8 cities in the United States had PM2.5 at least twice their usual for the time of year. The worst reading was Edinburg, Texas, United States: 27.5 µg/m³ on 27 July, about 2.5× its usual 10.8.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached8in 1 country
Days226 to 27 July 2023
Worst day27 July7 cities counted
Furthest above usual2.8×Eagle Pass

Day by day

27 July 7 cities at twice their usual or more
San AntonioLive OakMission BendMissouri CityCollege StationPasadenaPiedras NegrasLa PorteConroePort ArthurSulphurHoustonLaredoBaytownAustinEdinburgCorpus ChristiGalvestonEagle Pass
23 Jul24252627282930
Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.

How it spread

EdinburgEdinburg, 23 July: 8.4 µg/m³, 0.8× usualEdinburg, 24 July: 9.2 µg/m³, 0.9× usualEdinburg, 25 July: 20.5 µg/m³, 1.9× usualEdinburg, 26 July: 26.1 µg/m³, 2.4× usualEdinburg, 27 July: 27.5 µg/m³, 2.5× usualEdinburg, 28 July: 17.1 µg/m³, 1.6× usualEdinburg, 29 July: 13.4 µg/m³, 1.2× usualEdinburg, 30 July: 9.3 µg/m³, 0.9× usualHoustonHouston, 23 July: 8.8 µg/m³, 0.7× usualHouston, 24 July: 11.8 µg/m³, 0.9× usualHouston, 25 July: 14.6 µg/m³, 1.2× usualHouston, 26 July: 25.7 µg/m³, 2.1× usualHouston, 27 July: 26.4 µg/m³, 2.1× usualHouston, 28 July: 24.4 µg/m³, 2.0× usualHouston, 29 July: 21.9 µg/m³, 1.8× usualHouston, 30 July: 15.1 µg/m³, 1.2× usualCorpus ChristiCorpus Christi, 23 July: 7.6 µg/m³, 0.7× usualCorpus Christi, 24 July: 8.6 µg/m³, 0.8× usualCorpus Christi, 25 July: 21.2 µg/m³, 2.0× usualCorpus Christi, 26 July: 25.6 µg/m³, 2.4× usualCorpus Christi, 27 July: 26.7 µg/m³, 2.5× usualCorpus Christi, 28 July: 24.1 µg/m³, 2.2× usualCorpus Christi, 29 July: 16.3 µg/m³, 1.5× usualCorpus Christi, 30 July: 7.9 µg/m³, 0.7× usualGalvestonGalveston, 23 July: no readingGalveston, 24 July: no readingGalveston, 25 July: 10.4 µg/m³, 1.1× usualGalveston, 26 July: 25.3 µg/m³, 2.7× usualGalveston, 27 July: 24.5 µg/m³, 2.6× usualGalveston, 28 July: 21.6 µg/m³, 2.3× usualGalveston, 29 July: 20.5 µg/m³, 2.2× usualGalveston, 30 July: 12.9 µg/m³, 1.4× usualEagle PassEagle Pass, 23 July: no readingEagle Pass, 24 July: no readingEagle Pass, 25 July: 14.0 µg/m³, 1.5× usualEagle Pass, 26 July: 21.9 µg/m³, 2.3× usualEagle Pass, 27 July: 26.2 µg/m³, 2.8× usualEagle Pass, 28 July: 20.8 µg/m³, 2.2× usualEagle Pass, 29 July: 13.8 µg/m³, 1.5× usualEagle Pass, 30 July: 13.7 µg/m³, 1.4× usualLaredoLaredo, 23 July: no readingLaredo, 24 July: no readingLaredo, 25 July: no readingLaredo, 26 July: 24.8 µg/m³, 2.1× usualLaredo, 27 July: 26.2 µg/m³, 2.2× usualLaredo, 28 July: 16.5 µg/m³, 1.4× usualLaredo, 29 July: 15.2 µg/m³, 1.3× usualLaredo, 30 July: 11.1 µg/m³, 0.9× usualAustinAustin, 23 July: 11.5 µg/m³, 1.1× usualAustin, 24 July: 9.5 µg/m³, 0.9× usualAustin, 25 July: 13.9 µg/m³, 1.4× usualAustin, 26 July: 23.4 µg/m³, 2.3× usualAustin, 27 July: 25.5 µg/m³, 2.5× usualAustin, 28 July: 23.6 µg/m³, 2.3× usualAustin, 29 July: 20.5 µg/m³, 2.0× usualAustin, 30 July: 14.7 µg/m³, 1.5× usualBaytownBaytown, 23 July: 10.5 µg/m³, 0.9× usualBaytown, 24 July: 11.5 µg/m³, 1.0× usualBaytown, 25 July: 11.6 µg/m³, 1.0× usualBaytown, 26 July: 24.7 µg/m³, 2.2× usualBaytown, 27 July: 25.0 µg/m³, 2.2× usualBaytown, 28 July: 21.5 µg/m³, 1.9× usualBaytown, 29 July: 21.1 µg/m³, 1.9× usualBaytown, 30 July: 15.1 µg/m³, 1.3× usual23 Jul24252627282930
Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
Eagle PassTexas, United States1 26.227 July9.52.8×
GalvestonTexas, United States1 25.326 July9.32.7×
EdinburgTexas, United States2 27.527 July10.82.5×
AustinTexas, United States1 25.527 July10.12.5×
Corpus ChristiTexas, United States2 26.727 July10.82.5×
LaredoTexas, United States1 26.227 July11.82.2×
BaytownTexas, United States1 25.027 July11.32.2×
HoustonTexas, United States2 26.427 July12.52.1×

Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.

Against other episodes in the United States

Number 40 of 41 episodes in the United States since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 41.

Use this page

SmogRank, Texas, United States, July 2023: 8 cities with PM2.5 at twice their usual or more, 26 to 27 July 2023, smogrank.com/episodes/2023-07-texas-united-states (accessed 2 October 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.