Water that is cloudy is often the result of air in the water. To verify the cloudy water is caused by air, fill a clear glass with water from your faucet. Watch the glass closely. If the glass gets clear from the bottom to the top after a few minutes then there is air in the water. While the quality of the water is not affected by the presence of air, it could be indicative of a problem in the distribution system.
Water that is refrigerated overnight in a sealed container does taste better because, taste and odor causing compounds are usually aromatic and much more noticeable when they have not been chilled. We recommend keeping a bottle of tap water in the refrigerator. This also gives you the benefit of always having a cool drink of water.
Hard water is defined by the amount of calcium and magnesium present in the water. Hard water has a relatively high level as compared to soft water which has a low level.
Actually our water is not classified as hard or soft. It is medium (hard) and normally has a calcium carbonate hardness content ranging between 90 to 120 mg/l, or in other terms about 5 to 7 grains of hardness.