A contractor's on-the-job mistake sent roughly 100 gallons of wastewater into Lake Norman near Harbor Light Boulevard in Cornelius on Thursday, March 12, 2026, according to Charlotte Water.
Officials' account
Charlotte Water said the spill began when a contractor accidentally struck a low-pressure sewer line along Harbor Light Boulevard, opening the way for untreated wastewater to reach the lake. Utility crews were called in to stop the leak and assess the damage, WCNC reported.
Roughly 100 gallons ultimately made it into Lake Norman, Charlotte Water told reporters. Spokesperson Cam Coley warned that even everyday habits can set the stage for overflows if the system gets stressed, saying that "anything put in plumbing or a manhole can cause wastewater overflows," according to WCNC.
Low-pressure lines and past incidents
Low-pressure sanitary sewers are common along the Lake Norman shoreline, which helps explain why even a single line strike can quickly become a lake issue. Charlotte Water's own records show a series of relatively small overflows and construction-related breaks that have reached Lake Norman in recent years.
The city's FY25 wastewater performance report lists several incidents tied to pipe failures or contractor damage that led to sewage reaching surface waters. The data underscores how modest disruptions along these low-pressure lines can still send wastewater into the lake, according to Charlotte Water.
What residents should do
Officials are urging people to steer clear of swimming in the affected cove while crews continue to monitor conditions. Residents are also asked to report any cloudy or foul-smelling water so the utility can respond and test the area.
If you suspect a spill, call 311 or 704-336-7600. Charlotte Water and local outlets also remind residents to only flush toilet paper and to toss wipes, paper towels and grease in the trash to help prevent clogs that lead to overflows, according to WCCB.
Charlotte Water said crews contained the leak and will continue tracking water quality in the impacted area, WCNC reported.
