Read the excerpt from "Water Efficiency Strategies."

Water Loss Control—National studies indicate that, on average, 14 percent of the water treated by water systems is lost to leaks. Some water systems have reported water losses exceeding 60 percent. Accounting for water and minimizing water loss are critical functions for any water utility that wants to be sustainable.

What does the phrase "water loss control" mean?

limiting use of dishwashers and washing machines

limiting the number of household sinks and toilets

preventing water from being wasted due to leaks

preventing pipes from rusting and growing mold