The quality of tap water directly affects people's health. Due to the differences in water sources and tap water infrastructure across the country, the quality of tap water varies from place to place. Can you assess the quality of tap water at home?
Today, I will teach you to distinguish the quality of tap water at home through 6 tricks of "watching, smelling, observing, tasting, checking and measuring"!
Fill a glass of water with a glass cup with high transparency, and look at the light to see if there are any fine substances suspended in the water and sediments that sink to the bottom of the cup. Is the color colorless and transparent? If there are suspended solids or sediments, it means that the impurities in the water exceed the standard. If there are yellow, red, blue, etc., the tap water is polluted. Then let it stand for three hours and observe if there is any sediment on the bottom of the cup? If there is, it means that the impurities in the water exceed the standard.
If red nematodes are found in the effluent of tap water, attention should be paid to them. Wrap the faucet with gauze etc. and observe whether it is generated inside. If it is proved to be a problem in the pipeline, the source of the pollution should be found in time for cleaning and disinfection.
If the tap water from the tap is milky white, it will clarify after standing for a while. This phenomenon is caused by the dissolution of gas into tap water, does not affect drinking, and is harmless to the body.
Take a glass of water as far as possible from the faucet, and then use your nose to smell it. Is there any peculiar smell? If you can clearly smell the bleach (chlorine), it means that the residual chlorine in the tap water exceeds the standard. If you smell fishy or foul smell, it means that the microbes in the tap water exceed the standard. If you smell paint, gasoline, plastic, etc., it indicates that the tap water is contaminated by chemical substances.
In addition, if the tap water that has just been boiled, if you can smell the bleach (chlorine), it also shows that the residual chlorine in the tap water exceeds the standard.
After the tap water is boiled, phenomena such as white precipitation, turbidity, white floating matter and scaling will appear. Because natural water generally has hardness, its main components are calcium and magnesium. After heating, it combines with the bicarbonate present in the water to form a white precipitate of calcium carbonate and magnesium hydroxide that is insoluble in water. This is a normal phenomenon. Any natural water has more or less hardness, and white precipitate will be formed after heating. As long as it does not affect normal drinking, don't panic.
In addition, you can make tea with boiled tap water and observe whether the tea turns black overnight. If the tea turns black, it indicates that the iron and manganese content in the tap water exceeds the standard.
Take a sip of tap water to see if it tastes bad, and then bring it to a boil. Generally, the water will taste no other taste when it is boiled. If there is astringent feeling, it means that the hardness of the water is too high. As long as it doesn't affect normal drinking, don't panic. If there is a peculiar smell, do not continue to drink it, indicating that the water quality is contaminated.
Check whether there is any scaling on the inner wall of the water heater and kettle at home? If there is, it means that the water has high hardness (higher calcium and magnesium salt content), but scale is a normal phenomenon and is harmless to the human body, so there is no need to worry too much. But you need to pay attention: water with too high hardness can easily cause scaling of water heater pipes, which may burst due to poor heat exchange; long-term drinking of water with too high hardness can easily cause people to get various stone diseases.
The residual chlorine test agent can be used to test the residual chlorine in tap water. The user’s residual chlorine in the water ≥0.05mg/L is considered to meet the standard; the national standard stipulates that the residual chlorine content of the factory water is ≥0.3mg/L, and the water supply company generally controls it between 0.3-0.5mg/L.
The TDS water quality test pen can be used to test the total dissolved solids (TDS). Generally, the value detected by the TDS test pen for tap water is between 100-300. The value in this range is relatively normal, and if it exceeds it, it is contaminated water.
You can use a pH test paper or a pH test pen to test the pH of the water. The "Sanitary Standards for Drinking Water" stipulates that the pH value of tap water is between 6.5 and 8.5. Water that is too acidic or alkaline is not good for the human body, so the pH value is low Testing is also very important.
If you use the above methods to confirm that there is indeed a problem with the water quality of the tap water in your home, you can first check whether the tap water in your neighbor’s home has the same problem, or contact the community property to solve it. If you can’t solve it, you need to contact the water supply unit in time to ensure Safe drinking water.
Post time: Sep-29-2021