Texas

Texas has had by far the most of any state. Its 149 monster wells used a total of more than 1.85 billion gallons – well over half of the total number of wells and volume of water. Texas’ monster wells used an average of more than 12.4 million gallons each

On the full list of 261 wells, the largest water user was one in Harrison County, Texas, drilled in March 2013 by Sabine Oil & Gas LLC, which used more than 24.8 million gallons. The company did not report to FracFocus whether it was for oil or natural gas. The Texas county that was home to the most monster wells was Irion, with 19 wells that used an average of 12.9 million gallons of water each.

Pennsylvania

Pennsylvania had 39 monster wells, which used a total of more than 384 million gallons of water. They used an average of more than 11.3 million gallons each.

The largest water user in Pennsylvania was a natural gas well in Tioga County, drilled in February 2012 by Seneca Resources Corp., which used more than 18.7 million gallons. It ranked 17th on the national list of monster wells. The county with the most monster wells was Greene, with18 wells using an average of 11.2 million gallons each.

Colorado

Colorado had 30 monster wells, which used a total of almost 470 million gallons. They used an average of more than 15.6 million gallons of water each.

The largest water user in Colorado was a natural gas well in Garfield County, drilled in October 2011 by Encana Oil & Gas, which used more than 24 million gallons, enough to rank second on the national list.The Colorado county with the most monster wells was Garfield, with 16 wells using an average of 14.7 million gallons each.

Oklahoma

Oklahoma had 24 monster wells, which used a total of about 302 million gallons of water. They used an average of more than 12.6 million gallons each.

The largest water user in Oklahoma was in Pittsburg County, drilled in February 2012 by Newfield Exploration. It used more than 16.4 million gallons, which ranked 28th nationally. The company did not report the type of well to FracFocus. The Oklahoma county with the most monster wells was Pittsburg, with seven wells using an average of almost 13.3 million gallons each.

North Dakota

North Dakota had 11 monster wells, which used a total of almost 129 million gallons of water, for an average of more than 11.7 million gallons per well.

The largest water user in North Dakota was an oil well in Williams County, drilled in February 2013 by Continental Resources, which used more than 22.1 million gallons, ranking fifth nationally. All but three of the 11 monster wells in North Dakota were in McKenzie County, averaging 10.6 million gallons per well.

Louisiana

Louisiana had three monster wells, which used a total of about 42 million gallons of water for an average of about 14 million gallons each.

The largest water user in Louisiana was in St. Helena County, drilled in January 2013 by Encana Oil & Gas, which used more than 20 million gallons. It ranked 12th on the national list. The company did not report the type of well to FracFocus.

Mississippi

Mississippi also had three monster wells, which used a total of more than 38.4 million gallons of water, for an average of about 12.8 million gallons apiece. The largest water user in Mississippi was an oil well in Wilkinson County, drilled in January 2013 by Goodrich Petroleum Co., which used 13.7 million gallons, ranking 64th nationally.

Michigan

Michigan had two monster wells, which together used more than 33.6 million gallons of water. The largest was an oil well in Kalkaska County, drilled in October 2012 by Encana Oil & Gas, which used more than 21 million gallons, ranking eighth nationally.