St. Louis city - noise violation from generator

[Todd Kozak]

I have a rental in the Dogtown area. My tenant emailed me because the neighbor has a generator that is on all the time, in the backyard, and its loud. I knew this, I saw it when I was updating the house in October. The neighbor told me it was due to some electrical updates in his basement and would only be for a few weeks. Here we are 3 months later.

Before I reach out to the neighbor, wanted to ask: does anyone know the St. Louis city rules on outdoor generators as far as what is allowed? Maybe a certain amount of time it’s allowed to be used per day or something like that.