Water Authority Bans Some Geothermal Systems Citing Threat to Aquifer
Open-loop geothermal systems for a typical 2,000-square-foot house require about 15 gallons per minute, or more than 21,000 gallons per day of continuous water usage. Houses larger than 10,000 square feet can have systems that use in excess of 50 gallons per minute, or 72,000 gallons per day.