Hundreds of Aquarion Water customers in Greenwich were without water for 8 hours Tuesday due to a water main break. The break occurred on Arch Street Tuesday morning at around 9 a.m. Customers from Arch Street to Bolling Place were affected by the water main break.

Customers were advised to run their faucets for a few minutes once service was turned back on. Aquarion officials say they're not sure what caused the main to break.