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Data source: Environmental Protection Agency
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Air quality in Williston, North Dakota correlates with...

VariableCorrelationYearsSys. Score
PPG Industries' stock price (PPG)r=0.9518yrs426
Liquefied petroleum gas used in Tajikistanr=0.9627yrs416
Wind power generated in Tunisiar=0.9720yrs413
Biomass power generated in Latviar=0.9619yrs410
The number of postal service clerks in North Dakotar=0.9617yrs407
The Walt Disney Company's stock price (DIS)r=0.9218yrs396
Tractor Supply Company's stock price (TSCO)r=0.9518yrs396
Sales of LP/Vinyl Albumsr=0.9127yrs388
Visitors to Disney Worlds Magic Kingdomr=0.9313yrs388
US average dairy skim-solid content of yogurt, nonfrozenr=0.9520yrs386
Biomass power generated in Nigeriar=0.9520yrs380
Popularity of the 'drake' memer=0.9314yrs377
Google searches for 'numberphile'r=0.9416yrs374
The number of plumbers in North Dakotar=0.9317yrs374
Google searches for 'two day shipping'r=0.9216yrs372
Automotive recalls for issues with the Air Bagsr=0.930yrs371
The number of electricians in North Dakotar=0.9217yrs371
Google searches for 'Numberphile'r=0.9313yrs370
Solar power generated in Greecer=0.9716yrs369
Annual Revenue of the Lego Groupr=0.917yrs368
The TJX Companies' stock price (TJX)r=0.9418yrs365
Total likes of SmarterEveryDay YouTube videosr=0.9113yrs362
The average number of likes on SmarterEveryDay YouTube videosr=0.913yrs360
The average number of likes on The Game Theorists YouTube videosr=0.9111yrs360
Solar power generated in Luxembourgr=0.9519yrs359
Number of times 14 was a winning Mega Millions numberr=0.8818yrs359
GMO use in corn grown in North Dakotar=0.9315yrs356
Biogen's stock price (BIIB)r=0.9418yrs355
US household spending on health insurancer=0.9220yrs354
US household spending on healthcarer=0.9120yrs352
Annual US household spending on health insurancer=0.920yrs351
Number of websites on the internetr=0.8828yrs350
Petroluem consumption in Timor-Lester=0.9717yrs347
Christmas Price Index in the United Statesr=0.8828yrs346
Regeneron Pharmaceuticals' stock price (REGN)r=0.9318yrs344
US Shoe Store Salesr=0.8728yrs344
The number of maintenance and repair workers in North Dakotar=0.9217yrs341
Google searches for 'matt levine'r=0.9116yrs340
US Wind Power Generation Capacityr=0.8920yrs340
Number of Walmart stores worldwider=0.9212yrs339
US production of dry milk products (net)r=0.8820yrs338
Wind power generated in Venezuelar=18yrs336
Total Revenue of the NFL Teamsr=0.8719yrs336
Revenue of US Broadcasting Industryr=0.915yrs336
US production of whey products (net)r=0.8720yrs336
Number of Samsung Electronics Employees Worldwider=0.9211yrs335
Kimberly-Clark's stock price (KMB)r=0.9318yrs334
Google's Advertising Revenuer=0.8619yrs334
The number of production, planning, and expediting clerks in North Dakotar=0.9117yrs330
Average number of comments on The Game Theorists YouTube videosr=0.9111yrs330
Popularity of the first name Clarkr=0.8834yrs330
Popularity of the first name Irar=0.8834yrs330
Popularity of the first name Ariar=0.8734yrs329
Google searches for 'how to go to space'r=0.916yrs328
Canadian Pacific Railway's stock price (CP)r=0.9218yrs322
The number of OSHA specialists in North Dakotar=0.9216yrs320
The Hershey Company's stock price (HSY)r=0.9218yrs312
Biomass power generated in Paraguayr=0.9134yrs308
US dairy skim solids used to produce dry milk productsr=0.8820yrs306
Google searches for 'cat memes'r=0.9216yrs304
Novo Nordisk's stock price (NVO)r=0.9118yrs300
Popularity of the first name Ivoryr=0.8734yrs299
Wind power generated in United Kingdomr=0.9232yrs298
US milk fat used to produce dry milk productsr=0.8620yrs295
Comcast's stock price (CMCSA)r=0.9118yrs290
Popularity of the first name Coletter=0.8734yrs289
Wind power generated in Belgiumr=0.9133yrs287
US dairy skim solids used to produce whey productsr=0.8720yrs285
Colgate-Palmolive Company's stock price (CL)r=0.9118yrs280
Popularity of the first name Harveyr=0.8734yrs279
Google's annual advertising revenuer=0.8619yrs279
The number of lawyers in North Dakotar=0.8917yrs278
Google searches for 'ice bath'r=0.8916yrs277
Wind power generated in Canadar=0.9428yrs276
Ecolab's stock price (ECL)r=0.9118yrs270
Popularity of the first name Rosemaryr=0.8634yrs268
The number of construction laborers in North Dakotar=0.917yrs268
Google searches for 'tummy ache'r=0.8816yrs266
Solar power generated in Canadar=0.9328yrs265
AMETEK's stock price (AME)r=0.9118yrs260
Popularity of the first name Myrar=0.8634yrs258
The number of hotel desk clerks in North Dakotar=0.8917yrs256
Biomass power generated in Romaniar=0.9328yrs255
Genuine Parts Company's stock price (GPC)r=0.9118yrs250
Popularity of the first name Amosr=0.8634yrs248
The number of civil engineers in North Dakotar=0.8817yrs245
Solar power generated in Austriar=0.9327yrs244
Gilead Sciences' stock price (GILD)r=0.918yrs239
Renewable energy production in Cabo Verder=0.9327yrs234
The number of Breweries in the United Statesr=0.8730yrs234
The number of accountants and auditors in North Dakotar=0.8717yrs234
Chubb's stock price (CB)r=0.918yrs229
Solar power generated in Germanyr=0.9229yrs224
The number of maintenance workers, machinery in North Dakotar=0.8717yrs224
AutoZone's stock price (AZO)r=0.918yrs219
Biomass power generated in Indonesiar=0.9327yrs214
The number of retail salespersons in North Dakotar=0.8617yrs212
Crown Castle's stock price (CCI)r=0.918yrs209
Wind power generated in Polandr=0.9225yrs200
Seagen's stock price (SGEN)r=0.9118yrs199
Biomass power generated in Lithuaniar=0.9519yrs189


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You caught me! While it would be intuitive to sort only by "correlation," I have a big, weird database. If I sort only by correlation, often all the top results are from some one or two very large datasets (like the weather or labor statistics), and it overwhelms the page.

I can't show you *all* the correlations, because my database would get too large and this page would take a very long time to load. Instead I opt to show you a subset, and I sort them by a magic system score. It starts with the correlation, but penalizes variables that repeat from the same dataset. (It also gives a bonus to variables I happen to find interesting.)
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