Baltimore City will soon pump 50 million gallons of water a day from the Susquehanna River to supplement falling water levels in the region?s three reservoirs, public works officials announced.

The switch, beginning Tuesday, marks the first time since January 2002 the river was tapped to supplement the system?s sources for drinking water. Baltimore?s reservoirs have dropped since June ? when they were 99 percent full ? to their current level of 66 percent, officials said.