| 1 US gal = 3.785 litres 700k litres = 0.184920437 million US gallons "How much water does the typical hydraulically fractured well require?" https://www.usgs.gov/faqs/how-much-water-does-typical-hydrau... : > Water use per well can be anywhere from about 1.5 million gallons to about 16 million gallons https://www.epa.gov/watersense/statistics-and-facts : > Each American uses an average of 82 gallons of water a day at home (USGS, Estimated Use of Water in the United States in 2015). So, 1m gal / 82 gal/person/day = 12,195 person/days of water. Camping guidelines suggests 1-2 gallons of water per person per day. 1m gal / 2 gal/person/day = 500,000 person/days of water The 2016 Mars NatGeo series predicts dynamics of water scarcity on Mars. Water on Mars:
https://en.wikipedia.org/wiki/Water_on_Mars |