SmogRank / Episodes / Mexico

Guanajuato and Jalisco, Mexico, June 2023

For 2 days, from 17 to 18 June 2023, 10 cities in Mexico had PM2.5 at least twice their usual for the time of year. The worst reading was Tlaquepaque, Jalisco, Mexico: 75.2 µg/m³ on 17 June, about 4.3× its usual 17.5.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached10in 1 country
Days217 to 18 June 2023
Worst day17 June9 cities counted
Furthest above usual4.3×Guadalajara

Day by day

17 June 9 cities at twice their usual or more
IrapuatoAbasoloMoreliaSan Juan del RíoAguascalientesSan Francisco TlalcilalcalpanTolucaXonacatlánSan Salvador TizatlalliSan Mateo AtencoNaucalpan de JuárezEcatepec de MorelosMexico CityPachuca de SotoCuernavacaZacatepec de HidalgoCuautlaCholulaPueblaGuanajuatoSan Luis de la PazTepeji del Río de OcampoLeón de los AldamaCelayaSalamancaSan Miguel de AllendeSantiago de QuerétaroGuadalajaraTlaquepaque
14 Jun15161718192021
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

CelayaCelaya, 14 June: 21.5 µg/m³, 1.4× usualCelaya, 15 June: 27.8 µg/m³, 1.8× usualCelaya, 16 June: 32.5 µg/m³, 2.1× usualCelaya, 17 June: 37.6 µg/m³, 2.4× usualCelaya, 18 June: 32.5 µg/m³, 2.1× usualCelaya, 19 June: 26.1 µg/m³, 1.7× usualCelaya, 20 June: 21.8 µg/m³, 1.4× usualCelaya, 21 June: 23.1 µg/m³, 1.5× usualGuadalajaraGuadalajara, 14 June: no readingGuadalajara, 15 June: no readingGuadalajara, 16 June: 29.8 µg/m³, 2.1× usualGuadalajara, 17 June: 51.5 µg/m³, 3.6× usualGuadalajara, 18 June: 45.8 µg/m³, 3.2× usualGuadalajara, 19 June: 42.9 µg/m³, 3.0× usualGuadalajara, 20 June: no readingGuadalajara, 21 June: 69.7 µg/m³, 4.9× usualTlaquepaqueTlaquepaque, 14 June: no readingTlaquepaque, 15 June: no readingTlaquepaque, 16 June: no readingTlaquepaque, 17 June: 75.2 µg/m³, 4.3× usualTlaquepaque, 18 June: 65.3 µg/m³, 3.7× usualTlaquepaque, 19 June: 61.4 µg/m³, 3.5× usualTlaquepaque, 20 June: no readingTlaquepaque, 21 June: 65.8 µg/m³, 3.8× usualSalamancaSalamanca, 14 June: 22.9 µg/m³, 1.4× usualSalamanca, 15 June: 30.6 µg/m³, 1.9× usualSalamanca, 16 June: 29.9 µg/m³, 1.9× usualSalamanca, 17 June: 36.6 µg/m³, 2.3× usualSalamanca, 18 June: 39.8 µg/m³, 2.5× usualSalamanca, 19 June: 26.3 µg/m³, 1.6× usualSalamanca, 20 June: 24.8 µg/m³, 1.6× usualSalamanca, 21 June: 25.4 µg/m³, 1.6× usualLeón de los AldamaLeón de los Aldama, 14 June: 14.8 µg/m³, 0.9× usualLeón de los Aldama, 15 June: 18.8 µg/m³, 1.2× usualLeón de los Aldama, 16 June: 25.1 µg/m³, 1.6× usualLeón de los Aldama, 17 June: 33.4 µg/m³, 2.1× usualLeón de los Aldama, 18 June: 35.1 µg/m³, 2.3× usualLeón de los Aldama, 19 June: 25.1 µg/m³, 1.6× usualLeón de los Aldama, 20 June: 2.1 µg/m³, 0.1× usualLeón de los Aldama, 21 June: 32.9 µg/m³, 2.1× usualSan Luis de la PazSan Luis de la Paz, 14 June: 11.5 µg/m³, 0.8× usualSan Luis de la Paz, 15 June: 14.8 µg/m³, 1.1× usualSan Luis de la Paz, 16 June: 22.7 µg/m³, 1.7× usualSan Luis de la Paz, 17 June: 29.7 µg/m³, 2.2× usualSan Luis de la Paz, 18 June: 27.1 µg/m³, 2.0× usualSan Luis de la Paz, 19 June: 20.3 µg/m³, 1.5× usualSan Luis de la Paz, 20 June: 15.7 µg/m³, 1.2× usualSan Luis de la Paz, 21 June: 16.5 µg/m³, 1.2× usualSan Miguel de Allen…San Miguel de Allende, 14 June: 9.1 µg/m³, 0.8× usualSan Miguel de Allende, 15 June: 12.1 µg/m³, 1.1× usualSan Miguel de Allende, 16 June: 20.3 µg/m³, 1.9× usualSan Miguel de Allende, 17 June: 29.4 µg/m³, 2.7× usualSan Miguel de Allende, 18 June: 25.1 µg/m³, 2.3× usualSan Miguel de Allende, 19 June: 14.3 µg/m³, 1.3× usualSan Miguel de Allende, 20 June: 14.6 µg/m³, 1.4× usualSan Miguel de Allende, 21 June: 15.1 µg/m³, 1.4× usualGuanajuatoGuanajuato, 14 June: 9.1 µg/m³, 0.8× usualGuanajuato, 15 June: no readingGuanajuato, 16 June: no readingGuanajuato, 17 June: 26.6 µg/m³, 2.2× usualGuanajuato, 18 June: 24.2 µg/m³, 2.0× usualGuanajuato, 19 June: 17.3 µg/m³, 1.4× usualGuanajuato, 20 June: 15.3 µg/m³, 1.3× usualGuanajuato, 21 June: 16.5 µg/m³, 1.4× usualSantiago de Queréta…Santiago de Querétaro, 14 June: no readingSantiago de Querétaro, 15 June: no readingSantiago de Querétaro, 16 June: no readingSantiago de Querétaro, 17 June: 26.0 µg/m³, 2.3× usualSantiago de Querétaro, 18 June: 39.1 µg/m³, 3.4× usualSantiago de Querétaro, 19 June: 19.5 µg/m³, 1.7× usualSantiago de Querétaro, 20 June: no readingSantiago de Querétaro, 21 June: no readingTepeji del Río de O…Tepeji del Río de Ocampo, 14 June: no readingTepeji del Río de Ocampo, 15 June: no readingTepeji del Río de Ocampo, 16 June: no readingTepeji del Río de Ocampo, 17 June: 25.3 µg/m³, 1.2× usualTepeji del Río de Ocampo, 18 June: 46.7 µg/m³, 2.3× usualTepeji del Río de Ocampo, 19 June: no readingTepeji del Río de Ocampo, 20 June: no readingTepeji del Río de Ocampo, 21 June: 17.1 µg/m³, 0.8× usual14 Jun15161718192021
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
GuadalajaraJalisco, Mexico2 69.721 June14.34.9×
TlaquepaqueJalisco, Mexico2 75.217 June17.54.3×
Santiago de QuerétaroQuerétaro, Mexico2 39.118 June11.53.4×
San Miguel de AllendeGuanajuato, Mexico2 29.417 June10.82.7×
SalamancaGuanajuato, Mexico2 39.818 June16.02.5×
CelayaGuanajuato, Mexico2 37.617 June15.52.4×
Tepeji del Río de OcampoHidalgo, Mexico1 46.718 June20.42.3×
León de los AldamaGuanajuato, Mexico2 35.118 June15.62.3×
GuanajuatoGuanajuato, Mexico1 26.617 June12.02.2×
San Luis de la PazGuanajuato, Mexico2 29.717 June13.62.2×

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 Mexico

Number 3 of 6 episodes in Mexico since our records began, by cities reached.

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

Use this page

SmogRank, Guanajuato and Jalisco, Mexico, June 2023: 10 cities with PM2.5 at twice their usual or more, 17 to 18 June 2023, smogrank.com/episodes/2023-06-guanajuato-and-jalisco-mexico (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.