Warning signs are posted after 12,950 gallons of sewage overflowed near the University of Hawaii at Manoa.

The city’s Department of Environmental Services (ENV) received a call at 6:40 p.m. Friday of an overflow at 2256 Seaview Avenue.

Crews arrived at the site at 10:30 p.m., and released the blockage at 10:55 p.m. They also cleaned, disinfected, and deodorized the area.

Officials say debris caused the spill that entered a storm drain at the intersection of Metcalf and Hunnewell streets, which eventually empties into the Ala Wai Canal.

Water samples have been taken and the state Department of Health has been notified.

Water sample results are expected Sunday morning.

The spill has affected some beach activities as signs were posted this morning near Magic Island and at the entrance of the Ala Wai Boat Harbor telling people the water was not safe to swim in.

Saturday, which happened to be the second day of a body boarding competition, was called off because of the possible threat for illness in the water.

“It’s unfortunate that you know, the situation occurred, but I think this is a tour for the riders and we want to make sure that they’re taken care of and looked after and I think this is the best action we could’ve taken,” said event organizer Mike Stewart.

Event officials told KHON2 about 100 people from Oahu, neighboring islands and the mainland were scheduled to participate, but they decided to cancel in precaution, however not everyone at the beach today shared the same concern.

“I’m not too worried about it. I’ve seen the water much worse. Think I built up a resistance to it maybe,” said surfer Samuel Monahan.

Several beachgoers who disregarded the sign also told KHON2 they thought they were from the brown water advisory that was issued after Tropical Storm Darby.