"This morning's fault was found to be at Deep Creek where electronic hardware had failed."
He said due to the nature of that failure, monitoring systems which would normally send an alert, did not recognise there was a fault.
The council became aware of the problem when calls came in from Reporoa about 5.30am.
"Rotorua Contracting staff went out there immediately and by about 8.30am the system was fully operational again," Mr Bell said.
There had so far been no reported or identified issues with wastewater following the water outage, he said
"As far as we are able to ascertain - we can't be certain due to the fact no alarms were triggered - it appears the unrecorded failure occurred about 2am."
The two water sources out there supply the general Reporoa area including the village and a dairy factory which is the single biggest user in that community but was not affected by today's fault.
Earlier this morning both Reporoa Primary School and Reporoa College decided to send students home not knowing when the water supply would be back to normal.