The state Department of Health's Clean Water Branch was notified late Wednesday night that 2,300 gallons of sewage overflowed from a manhole at 3255 Nu'uanu Ave.

Approximately 700 gallons of the spill flowed into Nu'uanu Stream, while the remaining 1,600 gallons percolated into the ground, health officials said.

Sampling and posting of warning signs will commence at daybreak. The public is advised to stay out of Nu'uanu Stream until water tests indicate bacteria levels have returned to normal.