County health officials closed parts of La Jolla's popular WindanSea Beach Thursday after approximately 1,000 gallons of sewage spilled into the water.

The County of San Diego's Department of Environmental Health closed the section of the beach stretching from Nautilus Street to Marine Street at 1 p.m. The stretch of beach is about 2,000 feet long.

A ruptured force main at a pump station on the 100 block of Fern Glen at Vista Del Mar, adjacent to the beach, spilled approximately 1,000 gallons of sewage into the water.

Officials are collecting water quality samples at the site to assess the impacts of the spill.

Signs have also been posted at the beach and at access points to the beach. Still many beachgoers still got in the water.

"I wasn't aware of this one. I didn't know how close it was too," said Jason Belgau. He had just finished an afternoon of surfing.

Others weren't as bothered.

"I mean it bothered me a little bit, but it didn't seem that bad," said surfer

Gavin Schriner.

San Diego City's Public Utilities Department tells NBC7 it will conduct test over three days. That testing began Thursday. If tests on Friday show low-enough levels of contamination, Windansea could re-open this weekend.