Tests that showed elevated levels of lead and copper in water flowing from an Ohio town's taps has led officials to close schools Monday and order another round of inspections. The city manager of Sebring, a small town of some 4,000 people ... issued an advisory Thursday night warning children and pregnant women to avoid drinking the village system's tap water after seven of 20 homes showed levels of copper and lead beyond US Environmental Protection Agency (EPA) standards. The warning comes as neighboring Michigan grapples with a lead-poisoning crisis in Flint - a disaster that experts say underscores the growing need for investment and innovation in the nation's aging infrastructure. A weakened economy and the passage of time have made repair and replacement of old pipes a challenge, and have led to higher costs and a decline in water quality, especially in many older cities. Poor asset management, shrinking federal and state budgets, and a lack of political will to address the issue over decades has left the US with deteriorating water and wastewater systems - some dating back to the Civil War era - in urgent need of repair and replacement. The cost of restoring and expanding them to serve a growing population could cost up to $1 trillion over the next 25 years, the American Water Works Association (AWWA) estimates. The EPA's forecasts are more conservative - an investment of just over $330 billion over 20 years.