This note is used in the Darden course elective, "The Economics of Water." In many cities, water, sewage, and electricity utilities are city-owned, not-for-profit institutions. Indeed, a 2011 survey of 330 major cities worldwide published by Global Water Intelligence reveals that almost 85% of the water services of the cities surveyed are publicly managed; public-private partnerships account for 5%, and about 10% are privately run. As this note argues, there is a reason for this institutional setup.