Updated 4:31 p.m.
Mecklenburg County officials on Monday afternoon issued a swimming ban for Lake Cornelius after sewage leaked from a lift station on Peninsula Drive, in the Exit 30 area of Davidson. The leak forced cancellation of some programs at Lake Norman YMCA.

Charlotte-Meckelnburg Utilities said a broken pipe allowed about 375 gallons of wastewater to overflow from the 750-gallon facility on Monday. CMU said crews responded to the spill immediately and began a cleanup and repairs.  The utility said no dead fish were found.

Charlotte Mecklenburg Storm Water Services collected water samples Monday, and issued a “no-swim advisory” for the lake, which sits between Davidson and Cornelius.  The lake is bounded by I-77 and mostly residential neighborhoods, though it is the site of the Lake Norman YMCA.

YMCA officials said Tuesday afternoon that some programs were canceled Tuesday, including a day camp and water skiing. “While the Environmental Services Agency has assured the Lake Norman YMCA that it is highly unlikely that the YMCA beach area is affected, water samples have been taken in the Lake Norman YMCA cove as a preventative measure,” the YMCA said.

All lake activities within the YMCA cove will resume after coordination between the YMCA and the Mecklenburg County Water Quality and campers will be able to reschedule waterskiing sessions, the YMCA said.

Mecklenburg County Water Quality will continue testing the water until levels of fecal coliform bacteria fall below 200-colonies/100 ml, which is the level determined to be safe for swimming.  At that point, the no-swimming advisory will be lifted.

Rusty Rozzelle, Charlotte-Mecklenburg Storm Water Services’ Water Quality Program Manager, said the advisories are standard procedure. “It was necessary to close the areas to recreation because of the potential risk to human health, as Lake Cornelius is designated as recreational waters,” Mr.  Rozzelle said in a statement Monday.

In its advisory Monday, Charlotte Mecklenburg Utilities said it has a 24-hour phone line for residents to report spills: You can dial 311 or 704-336-7600.