SmogRank / Episodes / United States
Central United States and Mexico, March 2025
For 2 days, from 14 to 15 March 2025, 33 cities in the United States and Mexico had PM2.5 at least twice their usual for the time of year. The worst reading was Denton, Texas, United States: 63.0 µg/m³ on 14 March, about 9.0× its usual 7.0.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 33 in 2 countries
Days 2 14 to 15 March 2025
Worst day 14 March 31 cities counted
Furthest above usual 11× Lubbock
Day by day
Play 14 March 31 cities at twice their usual or more
Belton Corsicana Taylor Austin College Station San Marcos Live Oak San Antonio Missouri City Texarkana Baytown La Porte Shreveport Eagle Pass Galveston Port Arthur Laredo Dodge City Ciudad General Escobedo Raymore García Monterrey Jardines de la Silla Santa Catarina Lincoln Ciudad Benito Juárez Cadereyta Jiménez Houston Mission Pasadena Corpus Christi Mission Bend Conroe Wichita Springdale Heroica Matamoros Saint Joseph Oklahoma City Topeka Saginaw Derby Moore Fort Smith McAlester Jenks Ponca City Tulsa Kansas City Lawton Kansas City Edmond Liberty Fort Worth Olathe Odessa Leawood Denton Lubbock 11 Mar 12 13 14 15 16 17 18 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
Denton Denton, 11 March: 4.5 µg/m³ Denton, 12 March: 6.6 µg/m³ Denton, 13 March: 7.1 µg/m³ Denton, 14 March: 63.0 µg/m³, 9.0× its usual 7.0 Denton, 15 March: 31.1 µg/m³ Denton, 16 March: 2.9 µg/m³ Denton, 17 March: no reading Denton, 18 March: 6.2 µg/m³ Tulsa Tulsa, 11 March: 6.7 µg/m³ Tulsa, 12 March: 9.9 µg/m³ Tulsa, 13 March: 17.8 µg/m³ Tulsa, 14 March: 60.9 µg/m³, 6.2× its usual 9.8 Tulsa, 15 March: 36.8 µg/m³ Tulsa, 16 March: 15.1 µg/m³ Tulsa, 17 March: 10.1 µg/m³ Tulsa, 18 March: 12.0 µg/m³ Fort Worth Fort Worth, 11 March: 4.5 µg/m³ Fort Worth, 12 March: 9.3 µg/m³ Fort Worth, 13 March: 8.8 µg/m³ Fort Worth, 14 March: 60.1 µg/m³, 7.5× its usual 8.0 Fort Worth, 15 March: 47.8 µg/m³ Fort Worth, 16 March: 3.0 µg/m³ Fort Worth, 17 March: 4.9 µg/m³ Fort Worth, 18 March: 7.3 µg/m³ Olathe Olathe, 11 March: 9.8 µg/m³ Olathe, 12 March: 13.7 µg/m³ Olathe, 13 March: 17.6 µg/m³ Olathe, 14 March: 57.5 µg/m³, 7.6× its usual 7.6 Olathe, 15 March: 19.1 µg/m³ Olathe, 16 March: 3.6 µg/m³ Olathe, 17 March: 6.1 µg/m³ Olathe, 18 March: 9.5 µg/m³ Lubbock Lubbock, 11 March: 3.4 µg/m³ Lubbock, 12 March: 5.3 µg/m³ Lubbock, 13 March: 3.5 µg/m³ Lubbock, 14 March: 57.0 µg/m³, 11× its usual 4.5 Lubbock, 15 March: 3.8 µg/m³ Lubbock, 16 March: 1.8 µg/m³ Lubbock, 17 March: 8.7 µg/m³ Lubbock, 18 March: 77.8 µg/m³ Edmond Edmond, 11 March: 4.4 µg/m³ Edmond, 12 March: 8.0 µg/m³ Edmond, 13 March: 9.1 µg/m³ Edmond, 14 March: 56.2 µg/m³, 7.4× its usual 7.6 Edmond, 15 March: 9.6 µg/m³ Edmond, 16 March: 3.5 µg/m³ Edmond, 17 March: 4.3 µg/m³ Edmond, 18 March: 9.1 µg/m³ Jenks Jenks, 11 March: 8.4 µg/m³ Jenks, 12 March: 10.4 µg/m³ Jenks, 13 March: 14.9 µg/m³ Jenks, 14 March: 54.2 µg/m³, 5.9× its usual 9.2 Jenks, 15 March: 28.7 µg/m³ Jenks, 16 March: 4.6 µg/m³ Jenks, 17 March: 8.3 µg/m³ Jenks, 18 March: 7.7 µg/m³ Odessa Odessa, 11 March: 6.8 µg/m³ Odessa, 12 March: 13.8 µg/m³ Odessa, 13 March: 7.0 µg/m³ Odessa, 14 March: 52.9 µg/m³, 7.7× its usual 6.9 Odessa, 15 March: 10.4 µg/m³ Odessa, 16 March: 3.6 µg/m³ Odessa, 17 March: no reading Odessa, 18 March: 98.5 µg/m³ Kansas City Kansas City, 11 March: 10.3 µg/m³ Kansas City, 12 March: 18.2 µg/m³ Kansas City, 13 March: 17.7 µg/m³ Kansas City, 14 March: 52.9 µg/m³, 6.5× its usual 8.2 Kansas City, 15 March: 20.9 µg/m³ Kansas City, 16 March: 7.0 µg/m³ Kansas City, 17 March: 6.5 µg/m³ Kansas City, 18 March: 8.2 µg/m³ Ponca City Ponca City, 11 March: 5.2 µg/m³ Ponca City, 12 March: 8.9 µg/m³ Ponca City, 13 March: 14.6 µg/m³ Ponca City, 14 March: 51.3 µg/m³, 6.0× its usual 8.5 Ponca City, 15 March: 3.4 µg/m³ Ponca City, 16 March: 3.8 µg/m³ Ponca City, 17 March: 6.1 µg/m³ Ponca City, 18 March: 9.2 µg/m³ McAlester McAlester, 11 March: 4.9 µg/m³ McAlester, 12 March: 6.1 µg/m³ McAlester, 13 March: 8.2 µg/m³ McAlester, 14 March: 46.5 µg/m³, 5.9× its usual 7.9 McAlester, 15 March: 34.2 µg/m³ McAlester, 16 March: 5.3 µg/m³ McAlester, 17 March: 6.1 µg/m³ McAlester, 18 March: 6.1 µg/m³ Moore Moore, 11 March: 5.1 µg/m³ Moore, 12 March: 8.0 µg/m³ Moore, 13 March: 9.0 µg/m³ Moore, 14 March: 45.9 µg/m³, 5.5× its usual 8.4 Moore, 15 March: 7.2 µg/m³ Moore, 16 March: 3.4 µg/m³ Moore, 17 March: 4.4 µg/m³ Moore, 18 March: 8.9 µg/m³ Fort Smith Fort Smith, 11 March: 6.8 µg/m³ Fort Smith, 12 March: 9.4 µg/m³ Fort Smith, 13 March: 10.9 µg/m³ Fort Smith, 14 March: 45.3 µg/m³, 5.6× its usual 8.1 Fort Smith, 15 March: no reading Fort Smith, 16 March: no reading Fort Smith, 17 March: 6.8 µg/m³ Fort Smith, 18 March: 7.1 µg/m³ Lawton Lawton, 11 March: no reading Lawton, 12 March: no reading Lawton, 13 March: no reading Lawton, 14 March: 44.4 µg/m³, 6.5× its usual 6.8 Lawton, 15 March: 6.1 µg/m³ Lawton, 16 March: 2.8 µg/m³ Lawton, 17 March: 3.6 µg/m³ Lawton, 18 March: 9.8 µg/m³ Leawood Leawood, 11 March: 8.7 µg/m³ Leawood, 12 March: 13.7 µg/m³ Leawood, 13 March: 14.0 µg/m³ Leawood, 14 March: 44.2 µg/m³, 8.3× its usual 5.3 Leawood, 15 March: 20.0 µg/m³ Leawood, 16 March: 2.4 µg/m³ Leawood, 17 March: 4.6 µg/m³ Leawood, 18 March: 8.9 µg/m³ Oklahoma City Oklahoma City, 11 March: 5.1 µg/m³ Oklahoma City, 12 March: 8.8 µg/m³ Oklahoma City, 13 March: 10.2 µg/m³ Oklahoma City, 14 March: 43.0 µg/m³, 4.9× its usual 8.7 Oklahoma City, 15 March: 9.3 µg/m³ Oklahoma City, 16 March: 3.5 µg/m³ Oklahoma City, 17 March: 5.5 µg/m³ Oklahoma City, 18 March: 8.4 µg/m³ Kansas City Kansas City, 11 March: 8.1 µg/m³ Kansas City, 12 March: 16.0 µg/m³ Kansas City, 13 March: 16.0 µg/m³ Kansas City, 14 March: 42.6 µg/m³, 6.4× its usual 6.7 Kansas City, 15 March: 19.5 µg/m³ Kansas City, 16 March: 2.9 µg/m³ Kansas City, 17 March: 5.1 µg/m³ Kansas City, 18 March: 7.3 µg/m³ Heroica Matamoros Heroica Matamoros, 11 March: 4.7 µg/m³ Heroica Matamoros, 12 March: 9.0 µg/m³ Heroica Matamoros, 13 March: 21.5 µg/m³ Heroica Matamoros, 14 March: 41.6 µg/m³, 4.1× its usual 10.2 Heroica Matamoros, 15 March: 36.3 µg/m³, 3.6× its usual 10.1 Heroica Matamoros, 16 March: 18.9 µg/m³ Heroica Matamoros, 17 March: 10.2 µg/m³ Heroica Matamoros, 18 March: 8.0 µg/m³ Topeka Topeka, 11 March: 9.4 µg/m³ Topeka, 12 March: 14.4 µg/m³ Topeka, 13 March: 17.3 µg/m³ Topeka, 14 March: 40.6 µg/m³, 5.1× its usual 8.0 Topeka, 15 March: 8.2 µg/m³ Topeka, 16 March: 6.2 µg/m³ Topeka, 17 March: 8.2 µg/m³ Topeka, 18 March: 9.4 µg/m³ Derby Derby, 11 March: 7.0 µg/m³ Derby, 12 March: 14.7 µg/m³ Derby, 13 March: 16.5 µg/m³ Derby, 14 March: 39.1 µg/m³, 5.2× its usual 7.5 Derby, 15 March: 3.2 µg/m³ Derby, 16 March: 3.9 µg/m³ Derby, 17 March: 6.1 µg/m³ Derby, 18 March: 12.5 µg/m³ Saginaw Saginaw, 11 March: 4.7 µg/m³ Saginaw, 12 March: 7.2 µg/m³ Saginaw, 13 March: 5.0 µg/m³ Saginaw, 14 March: 39.1 µg/m³, 5.2× its usual 7.5 Saginaw, 15 March: 28.1 µg/m³ Saginaw, 16 March: 4.0 µg/m³ Saginaw, 17 March: 5.0 µg/m³ Saginaw, 18 March: 5.7 µg/m³ Liberty Liberty, 11 March: 8.1 µg/m³ Liberty, 12 March: 9.0 µg/m³ Liberty, 13 March: 13.2 µg/m³ Liberty, 14 March: 38.8 µg/m³, 7.5× its usual 5.2 Liberty, 15 March: 22.2 µg/m³ Liberty, 16 March: 2.8 µg/m³ Liberty, 17 March: 4.4 µg/m³ Liberty, 18 March: 7.2 µg/m³ Cadereyta Jiménez Cadereyta Jiménez, 11 March: 25.9 µg/m³ Cadereyta Jiménez, 12 March: no reading Cadereyta Jiménez, 13 March: 27.3 µg/m³ Cadereyta Jiménez, 14 March: 35.6 µg/m³, 2.3× its usual 15.7 Cadereyta Jiménez, 15 March: 32.5 µg/m³, 2.1× its usual 15.6 Cadereyta Jiménez, 16 March: 28.6 µg/m³ Cadereyta Jiménez, 17 March: 25.1 µg/m³ Cadereyta Jiménez, 18 March: 19.9 µg/m³ Springdale Springdale, 11 March: 5.9 µg/m³ Springdale, 12 March: 11.8 µg/m³ Springdale, 13 March: 16.0 µg/m³ Springdale, 14 March: 34.1 µg/m³, 3.8× its usual 8.9 Springdale, 15 March: 51.5 µg/m³ Springdale, 16 March: 7.7 µg/m³ Springdale, 17 March: 8.2 µg/m³ Springdale, 18 March: 15.6 µg/m³ Wichita Wichita, 11 March: 9.8 µg/m³ Wichita, 12 March: 15.3 µg/m³ Wichita, 13 March: 19.7 µg/m³ Wichita, 14 March: 33.5 µg/m³, 3.7× its usual 9.0 Wichita, 15 March: 3.9 µg/m³ Wichita, 16 March: 4.6 µg/m³ Wichita, 17 March: 5.7 µg/m³ Wichita, 18 March: 11.5 µg/m³ Saint Joseph Saint Joseph, 11 March: 7.4 µg/m³ Saint Joseph, 12 March: 12.9 µg/m³ Saint Joseph, 13 March: 23.4 µg/m³ Saint Joseph, 14 March: 32.1 µg/m³, 4.4× its usual 7.3 Saint Joseph, 15 March: 18.1 µg/m³ Saint Joseph, 16 March: no reading Saint Joseph, 17 March: 6.5 µg/m³ Saint Joseph, 18 March: 16.6 µg/m³ Corpus Christi Corpus Christi, 11 March: 5.8 µg/m³ Corpus Christi, 12 March: 8.0 µg/m³ Corpus Christi, 13 March: 20.3 µg/m³ Corpus Christi, 14 March: 30.1 µg/m³, 2.7× its usual 11.1 Corpus Christi, 15 March: 21.6 µg/m³ Corpus Christi, 16 March: 7.4 µg/m³ Corpus Christi, 17 March: 6.9 µg/m³ Corpus Christi, 18 March: 10.5 µg/m³ Conroe Conroe, 11 March: 9.2 µg/m³ Conroe, 12 March: 7.8 µg/m³ Conroe, 13 March: 14.2 µg/m³ Conroe, 14 March: 29.9 µg/m³, 2.9× its usual 10.2 Conroe, 15 March: 34.7 µg/m³ Conroe, 16 March: 8.2 µg/m³ Conroe, 17 March: 23.0 µg/m³ Conroe, 18 March: 6.7 µg/m³ Mission Bend Mission Bend, 11 March: 4.0 µg/m³ Mission Bend, 12 March: 5.7 µg/m³ Mission Bend, 13 March: 16.9 µg/m³ Mission Bend, 14 March: 28.0 µg/m³, 2.9× its usual 9.5 Mission Bend, 15 March: 25.0 µg/m³ Mission Bend, 16 March: 3.4 µg/m³ Mission Bend, 17 March: 4.3 µg/m³ Mission Bend, 18 March: 5.4 µg/m³ Houston Houston, 11 March: 9.8 µg/m³ Houston, 12 March: 10.1 µg/m³ Houston, 13 March: 19.0 µg/m³ Houston, 14 March: 27.9 µg/m³, 2.4× its usual 11.5 Houston, 15 March: 30.9 µg/m³ Houston, 16 March: 4.8 µg/m³ Houston, 17 March: 9.5 µg/m³ Houston, 18 March: 7.5 µg/m³ Pasadena Pasadena, 11 March: 6.6 µg/m³ Pasadena, 12 March: 7.8 µg/m³ Pasadena, 13 March: 17.2 µg/m³ Pasadena, 14 March: 26.9 µg/m³, 2.7× its usual 10.0 Pasadena, 15 March: 28.5 µg/m³ Pasadena, 16 March: 5.5 µg/m³ Pasadena, 17 March: 8.1 µg/m³ Pasadena, 18 March: 6.1 µg/m³ Ciudad Benito Juárez Ciudad Benito Juárez, 11 March: 28.9 µg/m³ Ciudad Benito Juárez, 12 March: 26.5 µg/m³ Ciudad Benito Juárez, 13 March: 26.3 µg/m³ Ciudad Benito Juárez, 14 March: 29.0 µg/m³ Ciudad Benito Juárez, 15 March: 38.8 µg/m³, 2.1× its usual 18.2 Ciudad Benito Juárez, 16 March: 27.3 µg/m³ Ciudad Benito Juárez, 17 March: 27.9 µg/m³ Ciudad Benito Juárez, 18 March: 21.1 µg/m³ Mission Mission, 11 March: 4.8 µg/m³ Mission, 12 March: 10.2 µg/m³ Mission, 13 March: 22.9 µg/m³ Mission, 14 March: 23.6 µg/m³ Mission, 15 March: 29.3 µg/m³, 2.6× its usual 11.4 Mission, 16 March: 21.4 µg/m³ Mission, 17 March: 11.7 µg/m³ Mission, 18 March: 9.6 µg/m³ 11 Mar 12 13 14 15 16 17 18 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. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Lubbock Texas, United States 1 14 March 4.5 11× Denton Texas, United States 1 14 March 7.0 9.0× Leawood Kansas, United States 1 14 March 5.3 8.3× Odessa Texas, United States 1 14 March 6.9 7.7× Olathe Kansas, United States 1 14 March 7.6 7.6× Fort Worth Texas, United States 1 14 March 8.0 7.5× Liberty Missouri, United States 1 14 March 5.2 7.5× Edmond Oklahoma, United States 1 14 March 7.6 7.4× Kansas City Kansas, United States 1 14 March 8.2 6.5× Lawton Oklahoma, United States 1 14 March 6.8 6.5× Kansas City Missouri, United States 1 14 March 6.7 6.4× Tulsa Oklahoma, United States 1 14 March 9.8 6.2× Ponca City Oklahoma, United States 1 14 March 8.5 6.0× Jenks Oklahoma, United States 1 14 March 9.2 5.9× McAlester Oklahoma, United States 1 14 March 7.9 5.9× Fort Smith Arkansas, United States 1 14 March 8.1 5.6× Moore Oklahoma, United States 1 14 March 8.4 5.5× Derby Kansas, United States 1 14 March 7.5 5.2× Saginaw Texas, United States 1 14 March 7.5 5.2× Topeka Kansas, United States 1 14 March 8.0 5.1× Oklahoma City Oklahoma, United States 1 14 March 8.7 4.9× Saint Joseph Missouri, United States 1 14 March 7.3 4.4× Heroica Matamoros Tamaulipas, Mexico 2 14 March 10.2 4.1× Springdale Arkansas, United States 1 14 March 8.9 3.8× Wichita Kansas, United States 1 14 March 9.0 3.7× Conroe Texas, United States 1 14 March 10.2 2.9× Mission Bend Texas, United States 1 14 March 9.5 2.9× Corpus Christi Texas, United States 1 14 March 11.1 2.7× Pasadena Texas, United States 1 14 March 10.0 2.7× Mission Texas, United States 1 15 March 11.4 2.6× Houston Texas, United States 1 14 March 11.5 2.4× Cadereyta Jiménez Nuevo León, Mexico 2 14 March 15.7 2.3× Ciudad Benito Juárez Nuevo León, Mexico 1 15 March 18.2 2.1×
Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.
Against other episodes in the United States and Mexico
Number 26 of 141 episodes in the United States and Mexico since our records began, by cities reached.
Eastern United States and Canada, 25 June to 2 July 2023 280 North-eastern United States and Canada, July 2026 264 Eastern United States and Canada, May and June 2023 261 North-eastern United States and Canada, 30 July to 9 August 2025 241 Eastern United States and Canada, July 2023 240 North-eastern United States and Canada, 3 to 9 June 2025 196 Eastern United States and Canada, 14 to 19 June 2023 161 North-eastern United States and Canada, 12 to 16 July 2025 119 North-western United States and Canada, August 2023 110 North-eastern United States and Canada, 10 to 14 June 2025 104 North-western United States and Canada, 4 to 11 August 2026 99 North-eastern United States and Canada, 14 to 19 February 2026 96 Central United States and Mexico, March 2025 33 Bars: cities reached; colour: the level of the episode's highest daily reading. All 141 .
Use this page SmogRank, Central United States and Mexico, March 2025: 33 cities with PM2.5 at twice their usual or more, 14 to 15 March 2025, smogrank.com/episodes/2025-03-central-united-states-and-mexico (accessed 4 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.
