Drinking water that started out as sewage may not sound very attractive—but it’s an attractive idea for cities looking to stretch their water supplies. Now a $86.7 Million Federal grant puts Tucson on track to build a special treatment plant able to purify wastewater so well it will be good to drink. Getting water that’s pure and safe to drink already takes a lot of processing. Now the City of Tucson has accepted a nearly 87 million dollar Federal grant to build a plant able to process wastewater so thoroughly it will be safe to drink. Tucson’s water director says 2.5 million gallons a day from the plant will be between two and five percent of what the city uses each day but it’s an important start in a desert city with a growing population.