Houston is a big blue city and the water plant is run by the city and not the state. Not that it even matters, mechanical failures happen in every state and everywhere has transformers that blow.

I had one in my freshman year dormitory at UMich.

I work in Detroit and we get notified of a boil water advisory there once or twice a year.

You cannot possibly be using Michigan, with the most famous case of unclean tap water in modern history, as better than Texas in this regard, right?