I had an issue with hydrogen sulfide bacteria in my well water system. If I didn't run any water for a couple days (like, say, I went away for the weekend), I'

I had an issue with hydrogen sulfide bacteria in my well water system. If I didn't run any water for a couple days (like, say, I went away for the weekend), I'd get a terrible sulfur smell to my water. When my well pump failed, I took the opportunity while the well head was off to dump a bunch of bleach down the well. Haven't had a problem in years now.