my water's clean? say what?

When I tested my water, I tested for Carbonate, Chloride, Chromate, Iron,Lead, Phosphate, and Sulfate.When we tested the water fountain, everything came out negative. I was surprised because the water in the fountain is usually cloudy and tastes weird. The other sample was from my water at my house. It has been a pinkish purple for a couple of days, so i decided to bring it in. I thought the water would have some type of pollutant in it because it always looks/taste weird. It was also purple a lot so i wanted to know why. After i tested the water, everything came back negative. I was kind of happy because now i know it won't kill me. So now i can drink my water without being threatened by chemicals. Above is a picture of our well and on the right is the water we tested, which is safe and clear.