Officials in Gladewater are working to figure out the cause behind elevated levels of lead in the city's drinking water. On Monday, the city sent out a notice advising residents that water tested from June to September had higher than usual levels of lead. Levels that were not a violation under fed

Based on the paragraph above can we conclude that "Officials in Gladewater figured out by the end of September what the cause is behind elevated levels of lead in the city's drinking water and they just aren't telling. "?
It's impossible to say