Although both were caused by power outages — the boil order when an outage Sunday at a water purification plant caused water pressure to drop, triggering concerns of possible contamination — that's where the similarities end, he said.
According to Turner, two transformers failed, causing power outages at the East Water Purification Plant, which he said provides water for much of Houston's 2.2 million residents.
The East Water Purification Plant is outside the city, in Galena Park.
The entrance to the East Water Purification Plant in Galena Park, outside Houston, on Monday.
The city issued the boil water notice in an "abundance of caution" after the main transformer and its backup failed, Turner said.