SmogRank / Episodes / United States
Central United States, 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 Brownsville Saint Joseph Oklahoma City Topeka Saginaw Derby Moore Fort Smith McAlester Jenks Ponca City Tulsa Kansas City Lawton Kansas City Edmond Fort Worth Liberty 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, 0.6× usual Denton, 12 March: 6.6 µg/m³, 0.9× usual Denton, 13 March: 7.1 µg/m³, 1.0× usual Denton, 14 March: 63.0 µg/m³, 9.0× usual Denton, 15 March: 31.1 µg/m³, 4.4× usual Denton, 16 March: 2.9 µg/m³, 0.4× usual Denton, 17 March: no reading Denton, 18 March: 6.2 µg/m³, 0.9× usual Tulsa Tulsa, 11 March: 6.7 µg/m³, 0.7× usual Tulsa, 12 March: 9.9 µg/m³, 1.0× usual Tulsa, 13 March: 17.8 µg/m³, 1.8× usual Tulsa, 14 March: 60.9 µg/m³, 6.2× usual Tulsa, 15 March: 36.8 µg/m³, 3.8× usual Tulsa, 16 March: 15.1 µg/m³, 1.5× usual Tulsa, 17 March: 10.1 µg/m³, 1.0× usual Tulsa, 18 March: 12.0 µg/m³, 1.2× usual Fort Worth Fort Worth, 11 March: 4.5 µg/m³, 0.6× usual Fort Worth, 12 March: 9.3 µg/m³, 1.2× usual Fort Worth, 13 March: 8.8 µg/m³, 1.1× usual Fort Worth, 14 March: 60.1 µg/m³, 7.5× usual Fort Worth, 15 March: 47.8 µg/m³, 6.0× usual Fort Worth, 16 March: 3.0 µg/m³, 0.4× usual Fort Worth, 17 March: 4.9 µg/m³, 0.6× usual Fort Worth, 18 March: 7.3 µg/m³, 0.9× usual Olathe Olathe, 11 March: 9.8 µg/m³, 1.3× usual Olathe, 12 March: 13.7 µg/m³, 1.8× usual Olathe, 13 March: 17.6 µg/m³, 2.3× usual Olathe, 14 March: 57.5 µg/m³, 7.6× usual Olathe, 15 March: 19.1 µg/m³, 2.5× usual Olathe, 16 March: 3.6 µg/m³, 0.5× usual Olathe, 17 March: 6.1 µg/m³, 0.8× usual Olathe, 18 March: 9.5 µg/m³, 1.3× usual Lubbock Lubbock, 11 March: 3.4 µg/m³, 0.7× usual Lubbock, 12 March: 5.3 µg/m³, 1.1× usual Lubbock, 13 March: 3.5 µg/m³, 0.7× usual Lubbock, 14 March: 57.0 µg/m³, 11× usual Lubbock, 15 March: 3.8 µg/m³, 0.8× usual Lubbock, 16 March: 1.8 µg/m³, 0.4× usual Lubbock, 17 March: 8.7 µg/m³, 1.7× usual Lubbock, 18 March: 77.8 µg/m³, 16× usual Edmond Edmond, 11 March: 4.4 µg/m³, 0.6× usual Edmond, 12 March: 8.0 µg/m³, 1.1× usual Edmond, 13 March: 9.1 µg/m³, 1.2× usual Edmond, 14 March: 56.2 µg/m³, 7.4× usual Edmond, 15 March: 9.6 µg/m³, 1.3× usual Edmond, 16 March: 3.5 µg/m³, 0.5× usual Edmond, 17 March: 4.3 µg/m³, 0.6× usual Edmond, 18 March: 9.1 µg/m³, 1.2× usual Jenks Jenks, 11 March: 8.4 µg/m³, 0.9× usual Jenks, 12 March: 10.4 µg/m³, 1.1× usual Jenks, 13 March: 14.9 µg/m³, 1.6× usual Jenks, 14 March: 54.2 µg/m³, 5.9× usual Jenks, 15 March: 28.7 µg/m³, 3.1× usual Jenks, 16 March: 4.6 µg/m³, 0.5× usual Jenks, 17 March: 8.3 µg/m³, 0.9× usual Jenks, 18 March: 7.7 µg/m³, 0.8× usual Odessa Odessa, 11 March: 6.8 µg/m³, 1.0× usual Odessa, 12 March: 13.8 µg/m³, 2.0× usual Odessa, 13 March: 7.0 µg/m³, 1.0× usual Odessa, 14 March: 52.9 µg/m³, 7.7× usual Odessa, 15 March: 10.4 µg/m³, 1.5× usual Odessa, 16 March: 3.6 µg/m³, 0.5× usual Odessa, 17 March: no reading Odessa, 18 March: 98.5 µg/m³, 14× usual Kansas City Kansas City, 11 March: 10.3 µg/m³, 1.3× usual Kansas City, 12 March: 18.2 µg/m³, 2.2× usual Kansas City, 13 March: 17.7 µg/m³, 2.2× usual Kansas City, 14 March: 52.9 µg/m³, 6.5× usual Kansas City, 15 March: 20.9 µg/m³, 2.5× usual Kansas City, 16 March: 7.0 µg/m³, 0.9× usual Kansas City, 17 March: 6.5 µg/m³, 0.8× usual Kansas City, 18 March: 8.2 µg/m³, 1.0× usual Ponca City Ponca City, 11 March: 5.2 µg/m³, 0.6× usual Ponca City, 12 March: 8.9 µg/m³, 1.0× usual Ponca City, 13 March: 14.6 µg/m³, 1.7× usual Ponca City, 14 March: 51.3 µg/m³, 6.0× usual Ponca City, 15 March: 3.4 µg/m³, 0.4× usual Ponca City, 16 March: 3.8 µg/m³, 0.4× usual Ponca City, 17 March: 6.1 µg/m³, 0.7× usual Ponca City, 18 March: 9.2 µg/m³, 1.1× usual McAlester McAlester, 11 March: 4.9 µg/m³, 0.6× usual McAlester, 12 March: 6.1 µg/m³, 0.8× usual McAlester, 13 March: 8.2 µg/m³, 1.0× usual McAlester, 14 March: 46.5 µg/m³, 5.9× usual McAlester, 15 March: 34.2 µg/m³, 4.3× usual McAlester, 16 March: 5.3 µg/m³, 0.7× usual McAlester, 17 March: 6.1 µg/m³, 0.8× usual McAlester, 18 March: 6.1 µg/m³, 0.8× usual Moore Moore, 11 March: 5.1 µg/m³, 0.6× usual Moore, 12 March: 8.0 µg/m³, 1.0× usual Moore, 13 March: 9.0 µg/m³, 1.1× usual Moore, 14 March: 45.9 µg/m³, 5.5× usual Moore, 15 March: 7.2 µg/m³, 0.9× usual Moore, 16 March: 3.4 µg/m³, 0.4× usual Moore, 17 March: 4.4 µg/m³, 0.5× usual Moore, 18 March: 8.9 µg/m³, 1.1× usual Fort Smith Fort Smith, 11 March: 6.8 µg/m³, 0.8× usual Fort Smith, 12 March: 9.4 µg/m³, 1.2× usual Fort Smith, 13 March: 10.9 µg/m³, 1.3× usual Fort Smith, 14 March: 45.3 µg/m³, 5.6× usual Fort Smith, 15 March: no reading Fort Smith, 16 March: no reading Fort Smith, 17 March: 6.8 µg/m³, 0.8× usual Fort Smith, 18 March: 7.1 µg/m³, 0.9× usual 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× usual Lawton, 15 March: 6.1 µg/m³, 0.9× usual Lawton, 16 March: 2.8 µg/m³, 0.4× usual Lawton, 17 March: 3.6 µg/m³, 0.5× usual Lawton, 18 March: 9.8 µg/m³, 1.4× usual Leawood Leawood, 11 March: 8.7 µg/m³, 1.6× usual Leawood, 12 March: 13.7 µg/m³, 2.6× usual Leawood, 13 March: 14.0 µg/m³, 2.6× usual Leawood, 14 March: 44.2 µg/m³, 8.3× usual Leawood, 15 March: 20.0 µg/m³, 3.8× usual Leawood, 16 March: 2.4 µg/m³, 0.5× usual Leawood, 17 March: 4.6 µg/m³, 0.9× usual Leawood, 18 March: 8.9 µg/m³, 1.7× usual Oklahoma City Oklahoma City, 11 March: 5.1 µg/m³, 0.6× usual Oklahoma City, 12 March: 8.8 µg/m³, 1.0× usual Oklahoma City, 13 March: 10.2 µg/m³, 1.2× usual Oklahoma City, 14 March: 43.0 µg/m³, 4.9× usual Oklahoma City, 15 March: 9.3 µg/m³, 1.1× usual Oklahoma City, 16 March: 3.5 µg/m³, 0.4× usual Oklahoma City, 17 March: 5.5 µg/m³, 0.6× usual Oklahoma City, 18 March: 8.4 µg/m³, 1.0× usual Kansas City Kansas City, 11 March: 8.1 µg/m³, 1.2× usual Kansas City, 12 March: 16.0 µg/m³, 2.4× usual Kansas City, 13 March: 16.0 µg/m³, 2.4× usual Kansas City, 14 March: 42.6 µg/m³, 6.4× usual Kansas City, 15 March: 19.5 µg/m³, 2.9× usual Kansas City, 16 March: 2.9 µg/m³, 0.4× usual Kansas City, 17 March: 5.1 µg/m³, 0.8× usual Kansas City, 18 March: 7.3 µg/m³, 1.1× usual Brownsville Brownsville, 11 March: 4.7 µg/m³, 0.5× usual Brownsville, 12 March: 9.0 µg/m³, 0.9× usual Brownsville, 13 March: 21.5 µg/m³, 2.1× usual Brownsville, 14 March: 41.6 µg/m³, 4.1× usual Brownsville, 15 March: 36.3 µg/m³, 3.6× usual Brownsville, 16 March: 18.9 µg/m³, 1.9× usual Brownsville, 17 March: 10.2 µg/m³, 1.0× usual Brownsville, 18 March: 8.0 µg/m³, 0.8× usual Topeka Topeka, 11 March: 9.4 µg/m³, 1.2× usual Topeka, 12 March: 14.4 µg/m³, 1.8× usual Topeka, 13 March: 17.3 µg/m³, 2.2× usual Topeka, 14 March: 40.6 µg/m³, 5.1× usual Topeka, 15 March: 8.2 µg/m³, 1.0× usual Topeka, 16 March: 6.2 µg/m³, 0.8× usual Topeka, 17 March: 8.2 µg/m³, 1.0× usual Topeka, 18 March: 9.4 µg/m³, 1.2× usual Derby Derby, 11 March: 7.0 µg/m³, 0.9× usual Derby, 12 March: 14.7 µg/m³, 2.0× usual Derby, 13 March: 16.5 µg/m³, 2.2× usual Derby, 14 March: 39.1 µg/m³, 5.2× usual Derby, 15 March: 3.2 µg/m³, 0.4× usual Derby, 16 March: 3.9 µg/m³, 0.5× usual Derby, 17 March: 6.1 µg/m³, 0.8× usual Derby, 18 March: 12.5 µg/m³, 1.7× usual Saginaw Saginaw, 11 March: 4.7 µg/m³, 0.6× usual Saginaw, 12 March: 7.2 µg/m³, 1.0× usual Saginaw, 13 March: 5.0 µg/m³, 0.7× usual Saginaw, 14 March: 39.1 µg/m³, 5.2× usual Saginaw, 15 March: 28.1 µg/m³, 3.7× usual Saginaw, 16 March: 4.0 µg/m³, 0.5× usual Saginaw, 17 March: 5.0 µg/m³, 0.7× usual Saginaw, 18 March: 5.7 µg/m³, 0.8× usual Liberty Liberty, 11 March: 8.1 µg/m³, 1.6× usual Liberty, 12 March: 9.0 µg/m³, 1.7× usual Liberty, 13 March: 13.2 µg/m³, 2.5× usual Liberty, 14 March: 38.8 µg/m³, 7.5× usual Liberty, 15 March: 22.2 µg/m³, 4.3× usual Liberty, 16 March: 2.8 µg/m³, 0.5× usual Liberty, 17 March: 4.4 µg/m³, 0.8× usual Liberty, 18 March: 7.2 µg/m³, 1.4× usual Cadereyta Jiménez Cadereyta Jiménez, 11 March: 25.9 µg/m³, 1.6× usual Cadereyta Jiménez, 12 March: no reading Cadereyta Jiménez, 13 March: 27.3 µg/m³, 1.7× usual Cadereyta Jiménez, 14 March: 35.6 µg/m³, 2.3× usual Cadereyta Jiménez, 15 March: 32.5 µg/m³, 2.1× usual Cadereyta Jiménez, 16 March: 28.6 µg/m³, 1.8× usual Cadereyta Jiménez, 17 March: 25.1 µg/m³, 1.6× usual Cadereyta Jiménez, 18 March: 19.9 µg/m³, 1.3× usual Springdale Springdale, 11 March: 5.9 µg/m³, 0.7× usual Springdale, 12 March: 11.8 µg/m³, 1.3× usual Springdale, 13 March: 16.0 µg/m³, 1.8× usual Springdale, 14 March: 34.1 µg/m³, 3.8× usual Springdale, 15 March: 51.5 µg/m³, 5.8× usual Springdale, 16 March: 7.7 µg/m³, 0.9× usual Springdale, 17 March: 8.2 µg/m³, 0.9× usual Springdale, 18 March: 15.6 µg/m³, 1.8× usual Wichita Wichita, 11 March: 9.8 µg/m³, 1.1× usual Wichita, 12 March: 15.3 µg/m³, 1.7× usual Wichita, 13 March: 19.7 µg/m³, 2.2× usual Wichita, 14 March: 33.5 µg/m³, 3.7× usual Wichita, 15 March: 3.9 µg/m³, 0.4× usual Wichita, 16 March: 4.6 µg/m³, 0.5× usual Wichita, 17 March: 5.7 µg/m³, 0.6× usual Wichita, 18 March: 11.5 µg/m³, 1.3× usual Saint Joseph Saint Joseph, 11 March: 7.4 µg/m³, 1.0× usual Saint Joseph, 12 March: 12.9 µg/m³, 1.8× usual Saint Joseph, 13 March: 23.4 µg/m³, 3.2× usual Saint Joseph, 14 March: 32.1 µg/m³, 4.4× usual Saint Joseph, 15 March: 18.1 µg/m³, 2.5× usual Saint Joseph, 16 March: no reading Saint Joseph, 17 March: 6.5 µg/m³, 0.9× usual Saint Joseph, 18 March: 16.6 µg/m³, 2.3× usual Corpus Christi Corpus Christi, 11 March: 5.8 µg/m³, 0.5× usual Corpus Christi, 12 March: 8.0 µg/m³, 0.7× usual Corpus Christi, 13 March: 20.3 µg/m³, 1.8× usual Corpus Christi, 14 March: 30.1 µg/m³, 2.7× usual Corpus Christi, 15 March: 21.6 µg/m³, 1.9× usual Corpus Christi, 16 March: 7.4 µg/m³, 0.7× usual Corpus Christi, 17 March: 6.9 µg/m³, 0.6× usual Corpus Christi, 18 March: 10.5 µg/m³, 0.9× usual Conroe Conroe, 11 March: 9.2 µg/m³, 0.9× usual Conroe, 12 March: 7.8 µg/m³, 0.8× usual Conroe, 13 March: 14.2 µg/m³, 1.4× usual Conroe, 14 March: 29.9 µg/m³, 2.9× usual Conroe, 15 March: 34.7 µg/m³, 3.4× usual Conroe, 16 March: 8.2 µg/m³, 0.8× usual Conroe, 17 March: 23.0 µg/m³, 2.3× usual Conroe, 18 March: 6.7 µg/m³, 0.7× usual Mission Bend Mission Bend, 11 March: 4.0 µg/m³, 0.4× usual Mission Bend, 12 March: 5.7 µg/m³, 0.6× usual Mission Bend, 13 March: 16.9 µg/m³, 1.8× usual Mission Bend, 14 March: 28.0 µg/m³, 2.9× usual Mission Bend, 15 March: 25.0 µg/m³, 2.6× usual Mission Bend, 16 March: 3.4 µg/m³, 0.4× usual Mission Bend, 17 March: 4.3 µg/m³, 0.5× usual Mission Bend, 18 March: 5.4 µg/m³, 0.6× usual Houston Houston, 11 March: 9.8 µg/m³, 0.9× usual Houston, 12 March: 10.1 µg/m³, 0.9× usual Houston, 13 March: 19.0 µg/m³, 1.7× usual Houston, 14 March: 27.9 µg/m³, 2.4× usual Houston, 15 March: 30.9 µg/m³, 2.7× usual Houston, 16 March: 4.8 µg/m³, 0.4× usual Houston, 17 March: 9.5 µg/m³, 0.8× usual Houston, 18 March: 7.5 µg/m³, 0.7× usual Pasadena Pasadena, 11 March: 6.6 µg/m³, 0.7× usual Pasadena, 12 March: 7.8 µg/m³, 0.8× usual Pasadena, 13 March: 17.2 µg/m³, 1.7× usual Pasadena, 14 March: 26.9 µg/m³, 2.7× usual Pasadena, 15 March: 28.5 µg/m³, 2.9× usual Pasadena, 16 March: 5.5 µg/m³, 0.6× usual Pasadena, 17 March: 8.1 µg/m³, 0.8× usual Pasadena, 18 March: 6.1 µg/m³, 0.6× usual Ciudad Benito Juárez Ciudad Benito Juárez, 11 March: 28.9 µg/m³, 1.6× usual Ciudad Benito Juárez, 12 March: 26.5 µg/m³, 1.5× usual Ciudad Benito Juárez, 13 March: 26.3 µg/m³, 1.4× usual Ciudad Benito Juárez, 14 March: 29.0 µg/m³, 1.6× usual Ciudad Benito Juárez, 15 March: 38.8 µg/m³, 2.1× usual Ciudad Benito Juárez, 16 March: 27.3 µg/m³, 1.5× usual Ciudad Benito Juárez, 17 March: 27.9 µg/m³, 1.5× usual Ciudad Benito Juárez, 18 March: 21.1 µg/m³, 1.2× usual Mission Mission, 11 March: 4.8 µg/m³, 0.4× usual Mission, 12 March: 10.2 µg/m³, 0.9× usual Mission, 13 March: 22.9 µg/m³, 2.0× usual Mission, 14 March: 23.6 µg/m³, 2.1× usual Mission, 15 March: 29.3 µg/m³, 2.6× usual Mission, 16 March: 21.4 µg/m³, 1.9× usual Mission, 17 March: 11.7 µg/m³, 1.0× usual Mission, 18 March: 9.6 µg/m³, 0.8× usual 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 18 March 4.5 16× Odessa Texas, United States 1 18 March 6.9 14× Denton Texas, United States 1 14 March 7.0 9.0× Leawood Kansas, United States 1 14 March 5.3 8.3× 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× Lawton Oklahoma, United States 1 14 March 6.8 6.5× Kansas City Kansas, United States 1 14 March 8.2 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× Springdale Arkansas, United States 1 15 March 8.9 5.8× 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× Brownsville Texas, United States 2 14 March 10.2 4.1× Wichita Kansas, United States 1 14 March 9.0 3.7× Conroe Texas, United States 1 15 March 10.2 3.4× Mission Bend Texas, United States 1 14 March 9.5 2.9× Pasadena Texas, United States 1 15 March 10.0 2.9× Corpus Christi Texas, United States 1 14 March 11.1 2.7× Houston Texas, United States 1 15 March 11.5 2.7× Mission Texas, United States 1 15 March 11.4 2.6× 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. 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 and Mexico
Number 23 of 106 episodes in the United States and Mexico since our records began, by cities reached.
North-eastern United States and Canada, June and July 2023 279 North-eastern United States and Canada, July 2026 264 North-eastern United States and Canada, May and June 2023 260 North-eastern United States and Canada, July and August 2025 241 North-eastern United States and Canada, July 2023 241 North-eastern United States and Canada, June 2025 196 North-eastern United States and Canada, June 2023 161 North-eastern United States and Canada, July 2025 119 North-western United States and Canada, August 2023 110 North-eastern United States, June 2025 104 North-western United States and Canada, August 2026 99 North-eastern United States and Canada, February 2026 96 Central United States, March 2025 33 Bars: cities reached; colour: the level of the episode's highest daily reading. All 106 .
Use this page SmogRank, Central United States, 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 (accessed 3 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.
