Mandatory water restrictions for thousands of Prince George’s County residents were lifted Friday afternoon, the Washington Suburban Sanitary Commission said.

The utility said that the damaged 54- inch diameter main had been repaired and returned to service. Friday afternoon lab tests showed that water in that section met Environmental Protection Agency standards, WSSC said.

It said the two employees, Tommy Ecker and Brad Destelhorst, who mitigated the problem by closing a key valve, were on hand to reopen the valve.