Sorry, computer glitch:
It appears from your post that you are a hypersensitive person. Suggest you buy mineral water of several brands and get them tested at some laboratory as the composition given on the labels may not satisfy you. You can then decide for yourself from the results which mineral water is "most suitable" in Qatar.
If you travel around Doha, you will see many people especially workers drinking from water coolers placed outside villas and at mosques. They also are humans and are not bothered about the quality of mineral waters available in the market.
Sometimes, a lot of money in the pocket make people act weird.