DANA POINT – The county has closed a part of Dana Point Harbor to swimming and diving because of a sewage spill.

The harbor from “F” through “O” dock on the north side of the east basin will be closed until further notice, according to an ocean recreational water update by OC Health Care Agency released 12:30 p.m. Saturday. People are still allowed to get to their boats, OC Health Care Agency spokeswoman Jessica Good said.

Roots in the sewage line caused a debris blockage and sewage backed up out of A manhole cover in the street, Good said. The South Coast Water District responded to the spill, which was reported at 8:22 a.m., and finished the cleanup by 9 a.m., Good said.

The closure will be lifted after OC Health Care Agency get acceptable results from samples collected on two consecutive days, Good said.

“In this case that would be Monday, at the earliest,” she said.