Experts: U.S. water infrastructure in trouble - CNN.com Total cost to fix U.S. water systems: $334.8 billion over 20 years Yearly U.S. water main breaks: 240,000 Sources: American Society of Civil Engineers, EPA Much of this is blamed on age. A large part of the U.S. water delivery system dates back to the years shortly after World War II. "Now it's time to replace that system and we've got to make those investments or we'll suffer the consequences," said Goldstein. To get an idea of how old the nation's water pipes are, 30% of pipes in systems that deliver water to more than 100,000 people are between 40 and 80 years old, according to the EPA. About 10% of pipes in those systems are older.