How to test the quality of the water by yourself, how to test the water quality

The first type: the "two looks" method

On the one hand, it is to look at the color of the water. It is recommended that you use a white porcelain bowl at home to hold water for easy observation. If the water in your home has a different color, it means that the drinking water is contaminated with different substances.

For example, the red color of the water is most likely due to the influence of rust and algae; The black color of the water is mainly due to manganese dioxide, an oxide of manganese; And if the water is yellow or brownish, it may be due to excessive addition of purifying agent or contamination with chromium or humus, etc. Residents drinking these discolored waters for a long time are very likely to damage the liver, kidneys, nervous system, etc.

The second type: test strip method:

You can buy a piece of white silk tissue paper from the Internet and put it in the water at home. This kind of paper has high flexibility, thicker and harder than ordinary white paper, and is mostly used for tender covers, business card making, etc., and is not easy to dissolve in water.

Wait until the tissue paper is completely soaked, then take it out and dry it in the sun. After that, carefully observe the surface of the silk paper, if there are stains, it proves that the water quality in your home is relatively poor, which will threaten the health of your family; If it is white and clean, it means that the water quality is better.

1. Look. Fill a glass of water with a glass with high transparency, look at the light to see if there are any fine substances suspended in the water, let it stand for three hours, and then observe whether there is sediment at the bottom of the cup.

2. Smell. Take a glass of water as far away from the faucet as possible, and then smell it with your nose, does it smell of bleaching powder (chlorine)? If you can smell the smell of bleaching powder (chlorine), it means that the residual chlorine in the tap water exceeds the standard.

3. Taste. If you can smell the smell of bleaching powder (chlorine), it means that the residual chlorine in the tap water exceeds the standard, and you must also use a water purifier for terminal treatment.

4. View. Make tea with tap water, observe whether the tea turns black after overnight, if the tea turns black, it means that the iron and manganese content in the tap water is seriously exceeded, and a water purifier equipped with iron removal and manganese filter elements should be used for terminal treatment.

5. Product. Taste boiled water, there is no astringent feeling in the taste, if there is, it means that the hardness of the water is too high.

6. Check. Check the water heater and boiling kettle at home, whether there is a layer of yellow scale on the inner wall, if there is, it also means that the hardness of the water is too high, (calcium and magnesium salt content is too high), and softening treatment should be used as soon as possible.

Methods for testing water quality include direct observation, TDS water quality testing pens and professional testing.

1. Direct observation.

The simplest and roughest method of water quality testing is to fill a representative water with a measuring cup or a glass cup with high transparency, and observe whether it contains fine impurities and floating objects in the light. After the water is allowed to stand for three hours, observe with the naked eye whether there is sediment and whether the color of the water is abnormal, if there is, it means that the suspended impurities in the water are seriously exceeded.

2. TDS water quality testing pen.

It can carry out simple self-test on water hardness and water-soluble matter, and TDS water quality testing pen is a popular water quality self-test tool in recent years. The lower the TDS value is displayed when the TDS pen is placed in the water to be tested, the less dissolved solids there are in the water and the purer the water quality. According to the "Drinking Water Standard", the TDS value is less than 1000mg L for qualified water quality.

3. Professional testing.

Professionals use testing instruments to conduct a comprehensive analysis of water quality data. When the amount of water we need to test is relatively large, or when it has a significant impact on people's health. You can contact professional water quality testing agency personnel to use ultra-high-precision water quality testing instruments to conduct on-site testing of water quality.

Water quality testing indicators

1. Total solids: the total amount of solid matter remaining after evaporation and drying of water samples at 103-105, also known as evaporation residues.

2. Suspended solids and dissolved solids: After the water sample is filtered, the residual solids after the filter sample intercept is evaporated and the residual solids are called suspended solids, and the residual solids of the locust after the filtrate is evaporated.

3. Volatile solids and stationary solids: the weight lost by burning the solid after evaporation and drying in the water sample at a certain temperature (600), which can be roughly expressed as the organic matter content. The weight of the residual material after burning is called a stationary solid.

4. Conductivity: Conductivity refers to the conductivity of a certain volume of solution, that is, the conductivity of the solution between two plate electrodes with an area of 1 square centimeter and a spacing of 1 cm at 25.

5. Non-specific indicators: conductivity, pH value, hardness, alkalinity, inorganic acidity, etc.

6. Non-specific organic matter index: total oxygen consumption, chemical oxygen consumption, biochemical oxygen consumption, total organic carbon, potassium permanganate index, phenols, etc.

1. Look: Connect the cup with water to check whether there are any impurities in the cup.

2. Smell: Smell the cup of water, if there is no peculiar smell in the cup, it means that the water quality is good and there is no residual chlorine. If there is a smell of bleaching powder, it means that the water purification substance exceeds the standard.

3. Taste: After boiling the water, let it cool and taste, the taste is astringent, indicating that the hardness of the water is very high and needs to be softened.

1. Look at the appearance: fill a glass of water with a glass of high transparency and see if there are any suspended fine substances in the water under the lamp. Let it sit for three hours, then observe the bottom of the glass for sediment.

If there is sediment, it must be end-treated with a water purifier.

2. Smell: Smell the water with your nose, good well water should have no peculiar smell.

3. Taste: Drink hot boiled water, whether there is a smell of bleach (chlorine), if you can smell the smell of bleach (chlorine), it means that the residual chlorine in the water exceeds the standard, and a water purifier must be used for the end**.

4. Observation: Make tea with tap water and observe whether the tea turns black the next night. Black tea refers to the fact that the iron and manganese in the water are seriously exceeded, and the water purifier equipped with a filter to remove the iron and manganese should be used for terminal treatment.

5. Product: Boiled water has a taste and astringency, indicating that the hardness of the water is too high, and a water purifier equipped with an ion exchange resin softening filter element should be used for treatment, and the taste of the water will deteriorate after treatment. Sweeter.

6. Inspection: Check whether the inner wall of the water heater and kettle at home has a layer of yellow scale. If there is, the hardness of the water is too high and the water should be softened with a softened water purifier as soon as possible.

The above content refers to Encyclopedia - Well Water.

Here's how to test the quality of the water:

1. Look at the change of water color, the ideal water quality often changes with the difference of light and time, the water color is generally light at the upwind place, the water color is strong at the downwind, the water color is light in the morning, and the water color is strong in the afternoon.

2. See if there is a bloom, when there are too many plankton in the water, the pool water will be blue-green or have a green ribbon or cloud-like bloom. This bloom tends to deteriorate the water quality when the weather changes abruptly, so a part of the pool water should be replaced.

3. Smell whether there is a peculiar smell in the pond water, if there are too many phytoplankton in the pond water, it is easy to age and die if it cannot be eaten by fish, and you can smell the fishy smell or odor in the downwind of the pond. In this case, it is necessary to prevent further deterioration of water quality and cause hypoxia.

4. Measure the transparency, you can roughly measure the transparency of the water hole with the palm of your hand. The suitable transparency of aquaculture water is between 20-40 cm, less than 20 cm, and the pool water is too fertile. More than 40 cm, the pool water is too thin.

5. Look at the water color, the ideal water color is yellow-brown, oil green, grass green with yellow, dark green and other colors, this water color of the breeding water contains abundant, easily digestible plankton. The undesirable water color is light green, grass green, gray blue, etc., and although the water contains a certain amount of plankton, most of them are difficult to digest.

6. Look at the oil film downwind, generally there is often a dark green or smoky gray oil film downwind of the pond, less in the morning and more in the afternoon. If there is less oil film, the water quality is better. If there is too much oil film, it will affect the oxygen exchange between the pool water and the outside world, and attention should be paid to strengthening the water exchange.