A 12-inch water service line broke early Tuesday and shut down South Old Peachtree Road from South Berkeley Lake Road to Peachtree Industrial Boulevard in the Norcross area.

Hours after the break that left Gwinnett County residents without water, the road reopened.

Karen Shields, spokeswoman for the Gwinnett County Department of Water Resources, said approximately 40 customers were affected.

Gwinnett police first reported the break at 6:30 a.m. on Twitter and the road reopened shortly before 5 p.m.

“We have not yet determined a cause,” Shields said.

Vernon Mullins with AT&T waits for the company's drivers to come down South Old Peachtree Road, where there was a water main break. JOHN SPINK / JSPINK@AJC.COM

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Most of the 44 employees at GoGreen waste management solutions were sent home due to the lack of water, warehouse worker Mark Hulsey said.

“None of my fire systems work,” he said earlier. “It’s kind of a safety issue.”

A sinkhole opened near the site of the water main break, police Cpl. Michele Pihera said.

The incident in Gwinnett comes six days after a massive break crippled DeKalb County’s water system and disrupted a multitude of services. The county was under a boil water advisory until Friday.

— Staff writer Tyler Estep contributed to this article.

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