City Councilmembers got an earful yesterday when they dug deeper into the causes of the Nov.17 boil water advisory.

Turns out two key S&WB employees went AWOL just as power outages put the entire East Bank water supply in jeopardy. On top of that, Entergy New Orleans waited four hours to give notice that its power outage would affect one of the city’s water pumps.

We already knew the boil water alert was caused by several failures. Now we know just how colossal — but utterly avoidable — those failures were.

S&WB employees are protected by Civil Service, so we don’t yet know who bailed when things went wrong.

OK, fine. But who’s protecting us … from their failures?