Top variables that correlate with Air quality in Hagerstown, Maryland

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Data source: Environmental Protection Agency
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Air quality in Hagerstown, Maryland correlates with...

Variable	Correlation	Years	Has img?
Number of Registered Vehicles in the US	r=0.94	32yrs	No
Number of public school students in 12th grade	r=0.93	33yrs	No
Number of Lawyers in the United States	r=0.92	34yrs	No
Afghanistan's Estimated Opium Production	r=0.71	33yrs	No

Air quality in Hagerstown, Maryland also correlates with...

Variable	Correlation	Years	Sys. Score
Biomass power generated in Taiwan	r=0.94	33yrs	392
Liquefied petroleum gas used in Dominica	r=0.94	34yrs	390
Number of households headed by single fathers in the United States	r=0.92	32yrs	388
Electricity generation in Bosnia and Herzegovina	r=0.91	30yrs	384
Number of public school students in 11th grade	r=0.92	33yrs	370
Number of highschoolers in the US	r=0.91	33yrs	368
Popularity of the first name Armani	r=0.9	37yrs	366
The Coca-Cola Company's stock price (KO)	r=0.86	22yrs	362
McDonald's stock price (MCD)	r=0.86	22yrs	362
Realty Income's stock price (O)	r=0.89	22yrs	362
Google searches for 'i have a headache'	r=0.87	20yrs	358
Google searches for 'i have the flu'	r=0.87	20yrs	358
Intel Corporation's annual revenue	r=0.9	36yrs	357
Gasoline pumped in Namibia	r=0.92	32yrs	354
Gender pay gap in the U.S.	r=0.88	32yrs	353
Annual Revenue of Walt Disney Company	r=0.88	32yrs	353
Inflation in the US	r=0.89	31yrs	350
Total Sales at Clothing and Accessories Stores	r=0.86	31yrs	349
Liquefied petroleum gas used in Seychelles	r=0.91	33yrs	344
US Wind Power Generation Capacity	r=0.89	23yrs	342
Ticket prices at North American movie theaters	r=0.86	22yrs	340
Total NBA League Revenue	r=0.89	21yrs	340
Google searches for 'tummy ache'	r=0.88	20yrs	340
Popularity of the 'this is fine' meme	r=0.86	18yrs	340
American cheese consumption	r=0.89	32yrs	339
Milk-fat consumption	r=0.89	32yrs	339
Popularity of the 'this is fine' meme	r=0.85	18yrs	339
US milk fat used to produce dry milk products	r=0.87	22yrs	338
The number of electrical engineers in Maryland	r=0.87	20yrs	336
The number of clergy in Maryland	r=0.87	20yrs	336
Total Revenue of the NFL Teams	r=0.86	20yrs	335
The number of operations research analysts in Maryland	r=0.86	20yrs	335
Global annual electricity generation	r=0.87	18yrs	334
Popularity of the first name Kennedi	r=0.9	34yrs	334
Fossil fuel use in Bosnia and Herzegovina	r=0.9	30yrs	332
Dollar Tree's stock price (DLTR)	r=0.87	22yrs	332
Annual US household spending on poultry	r=0.9	23yrs	324
Total likes of Tom Scott's YouTube videos	r=0.85	15yrs	324
Total length of Steve Mould's YouTube videos	r=0.85	15yrs	324
Geothermal power generated in Costa Rica	r=0.9	30yrs	322
Hormel Foods' stock price (HRL)	r=0.89	22yrs	322
Annual US household spending on fresh vegetables	r=0.89	23yrs	322
Annual US household spending on rented dwellings	r=0.89	23yrs	322
Annual US household spending on healthcare	r=0.89	23yrs	322
Annual US household spending on health insurance	r=0.89	23yrs	322
Annual US household spending on medical supplies	r=0.88	23yrs	321
US household spending on healthcare	r=0.88	23yrs	321
CGI Inc.'s stock price (GIB)	r=0.88	22yrs	310
Google searches for 'no cap'	r=0.87	20yrs	308
US production of cheese (other than cottage cheese)	r=0.86	22yrs	307
Number of public school students in 10th grade	r=0.9	33yrs	307
SAP SE's stock price (SAP)	r=0.87	22yrs	298
Google searches for 'buy a house'	r=0.87	20yrs	298
US production of dry milk products (net)	r=0.86	22yrs	297
US kids in public school	r=0.89	33yrs	296
Becton, Dickinson and Company's stock price (BDX)	r=0.87	22yrs	288
Electricity generation in Aruba	r=0.89	36yrs	287
US milk fat used to produce cheese (excluding cottage cheese)	r=0.86	22yrs	287
Google searches for 'smol'	r=0.86	20yrs	286
Number of public school students in 8th grade	r=0.88	33yrs	284
Ross Stores' stock price (ROST)	r=0.87	22yrs	278
Yogurt consumption	r=0.87	32yrs	276
Google searches for 'best colleges'	r=0.86	20yrs	276
Petroluem consumption in Namibia	r=0.9	32yrs	272
Yum! Brands' stock price (YUM)	r=0.87	22yrs	268
US dairy skim solids used to produce cheese (other than cottage cheese)	r=0.86	22yrs	266
Google searches for 'do i need to go to the doctor'	r=0.86	20yrs	266
Kerosene used in New Caledonia	r=0.89	34yrs	262
WEC Energy Group's stock price (WEC)	r=0.87	22yrs	258
Average SAT score in math	r=0.79	33yrs	257
US dairy skim solids used to produce dry milk products	r=0.86	22yrs	256
Google searches for 'instagram'	r=0.9	13yrs	256
Automotive recalls issued by Hyundai Motor America	r=0.76	37yrs	256
Petroluem consumption in Turkmenistan	r=0.9	30yrs	250
Eversource Energy's stock price (ES)	r=0.87	22yrs	248
Google searches for 'dollar store near me'	r=0.85	20yrs	245
Mozzarella cheese consumption	r=0.88	27yrs	242
Liquefied petroleum gas used in Mali	r=0.87	34yrs	239
Diageo's stock price (DEO)	r=0.86	22yrs	237
Italian-type cheese consumption	r=0.86	27yrs	230
Nuclear power generation in Russia	r=0.87	30yrs	228
Ecolab's stock price (ECL)	r=0.86	22yrs	227
US Bottled Water Consumption per Person	r=0.87	24yrs	226
Biomass power generated in Singapore	r=0.86	32yrs	218
Brown-Forman's stock price (BF.A)	r=0.86	22yrs	217
Natural cheese consumption	r=0.87	27yrs	214
Gasoline pumped in Turkmenistan	r=0.89	30yrs	208
Brown-Forman's stock price (BF.B)	r=0.86	22yrs	207
Church & Dwight Co.'s stock price (CHD)	r=0.86	22yrs	197
Gasoline pumped in Cabo Verde	r=0.89	28yrs	196
DTE Energy Company's stock price (DTE)	r=0.86	22yrs	187
Liquefied petroleum gas used in Turkmenistan	r=0.88	30yrs	186
HDFC Bank's stock price (HDB)	r=0.85	22yrs	176
Fossil fuel use in Eritrea	r=0.85	28yrs	173
Amgen's stock price (AMGN)	r=0.85	22yrs	166
Biomass power generated in Lithuania	r=0.89	21yrs	162
Google searches for 'how to immigrate to canada'	r=0.85	20yrs	154
Biomass power generated in India	r=0.87	23yrs	151

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^{What is Sys. Score?} 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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