Health officials are advising all Town of Ontario water customers to boil their water before using it.
At about 3:00 a.m. Sunday there was a water main break near the entrance of the Ginna Nuclear Power plant on Lake Road.
Officials say there does not appear there was contamination of the water, but since the water line was breached they want to make sure the water is safe (they say if there was contamination, it would be due to bacteria, not anything having to do with radiation).
Town of Ontario Supervisor Frank Robusto says crews were able to locate and isolate the issue, which was on a 12'' water main located near Ginna.
He says repairs are underway and once the line is fully fixed, the system needs to be flushed out of an abundance of caution.
That break also resulted in a large water leak along Lake Road.
All water customers are told to water to a rolling boil for one minute and allow it to cool before drinking, or use bottled water, but the water can still be used for bathing and washing.
Officials say some people in the Wayne County Town of Ontario may experience low water pressure due to the system being flushed.
The boil water advisory is expected to be in effect for the next 3-4 days.