Article in English: You can determine a great deal about the quality of your water by tuning in to your senses. Even if a professional water engineer were to come test your water quality, they would be sure to smell, taste, and visually examine the water. Test the quality of your water through your senses, first, by giving it a good smell.  Bleach smell – This likely occurs from the chlorine your local treatment plant must add to your water to make it safe. This scent often dissipates if the water is exposed to air for a little while. Alternatively, you can purchase a home water filter to get rid of it. Generally, a bleach smell is not harmful. Rotten-egg smell – This sulfurous smell usually indicates a growth of bacteria. First, pour a glass of water and bring it to another part of the house, wait a few minutes, and then smell it. If the water no longer smells, then the bacteria is growing inside your drain and should be cleaned. If the water still smells strongly of rotten egg (and if this occurs with both hot and cold water), contact your local municipality. Musty or earthy smell – This smell is likely the result of organic matter decaying. Once again, this could either be inside your drain or in the water itself. Although this smell may be bothersome, it is most likely harmless. Use your taste buds to determine the quality of your water. First of all, if your water tastes very foul, spit it out! If your tap water has a metallic taste, this can be caused by either low pH levels, or excess minerals in your water supply (potentially due to rusty pipes). If your water taste like bleach, it could be an excess of chlorine. And if your water tastes salty, this could indicate the presence of chloride ions or sulfates, which could be caused by industrial waste or irrigation drainage. If the taste of your water offends you, contact your local municipality, or the Environmental Protection Agency (EPA). Hold a glass of water up to the light and look for floating particles or general cloudiness. Brown, orange, or red particles can be...

Summary in Chinese:
闻闻水的气味。 尝尝水的味道。 检查是否浑浊或有颗粒物。 检查颜色。 检查管道是否有锈迹或积聚物。