WaterQuest Hydroresources Management works to locate underground rivers more than 1,000 feet deep, a feat it manages by partnering with companies in two industries with deep-drilling expertise: mining and oil/gas exploration. WaterQuest claims it is 98% accurate in finding such underground rivers, which represent key water supplies in areas with drought conditions or groundwater sources that are contaminated or are sparse. That is vital, because the World Health Organization estimates that 663 million people lack access to clean drinking water. In 2016, WaterQuest added a significant marker to its subterranean exploration: the disruption of electromagnetic fields caused by underground rivers. WaterQuest has clients in India (including a power plant, a steel plant, and water-supply companies), Malawi (a university and a water board), and Kenya (a steel plant), and is in talks with potential California clients, including an almond growers association.