I am a paid user of Tuta and I have never seen any ads. Where did you see them and what kind of ads?

Me too! I am truly part of the lemmy community now.

The water is tested and 99% of the time it is probably safe to drink. But who knows how much of it you will drink before it is discovered (and then even longer to reveal) that there was an issue with the water.

Where I live has heavy agriculture and oil industry presence. People here are concerned over pesticides and random chemicals randomly seeping into the water system.