Even small water leaks can be costly. A dripping facet or fixture can waster 3 gallons of water each day, or 1095 per year.
A continuous leak from a hole just 1/16" in diameter would waste 74,000 gallons, or 9,850 cubic feet of water in just 3 months. If the hole is 1/8" in diameter, the water loss increases by a factor of 4, to 39,400 cubic feet in 3 months. It's cheaper to replace the facet or fixture than to pay the for the wasted water.