What are the knowledge about drinking water safety in rural areas?

1, what is "rural drinking water safety"? Rural drinking water safety means that rural residents can get enough, clean and affordable drinking water in time and conveniently. Rural drinking water safety includes four evaluation indexes: water quality, water quantity, water convenience and water supply guarantee rate. "Some people think it is convenient to drink cold water when you are thirsty. Tap water is sterilized and can be drunk directly. Springs and rivers are natural. As long as it is not dirty, you can also drink it directly, which is harmless to human body. This view is wrong. Rural residents must abandon the bad habit of drinking raw water directly if they want to drink healthy and safe water! Rain, well water, river water, mountain spring water and tap water can't be directly drunk, and they need to be filtered, disinfected or boiled before drinking.

2. Why can't I drink raw water? Well water is often polluted by the environment. If individual wells are close to toilets and pigsty, they may seep into feces, sometimes fall into dirty things, and also flow into or seep into wells with rainwater. The main components of rainwater are water and dust particles. In the process of falling to the ground, rainwater will be contaminated with dust and germs in the air, so rainwater is not drinkable. The river has been flowing. In places you don't know, there may be domestic pollution such as washing clothes, brushing shoes, washing toilets, dumping sewage, throwing garbage, throwing dead poultry, and industrial pollution such as factory waste liquid and sewage. Although tap water has been disinfected, disinfection does not mean sterilization. After disinfection, there will still be a certain amount of pathogenic microorganisms in the water, and if there is an accident, such as pipeline rupture, tap water will also be polluted.

3. What's the harm of drinking raw water? There are all kinds of bacteria, viruses and parasites harmful to human body in raw water. Drinking raw water can easily cause acute gastroenteritis, viral hepatitis, typhoid fever, dysentery and parasitic infection. In particular, rivers, reservoirs and wells are polluted by factory waste liquid, domestic wastewater and pesticide residues to varying degrees, and drinking raw water is more likely to cause diseases.

4. How to preliminarily judge the quality of drinking water? Through naked eye observation, the water quality is transparent, there is no color and impurity in the water, the nose can't smell the peculiar smell in the water, the mouth tastes bitter, and the water feels sticky, so it can be preliminarily judged that the water quality is good.

5. Does the well need disinfection? Generally speaking, groundwater can be boiled for drinking without deliberate disinfection. Newly dug wells generally do not need to be disinfected as long as the water quality is no problem and the water source is not polluted. Only when the well is dug, the shaft wall is polluted, the building materials of the shaft wall carry harmful floating dust, or the well flows into rain, flood or sewage, it needs disinfection.

6. Why does qualified tap water have a faint smell of disinfectant? The smell of disinfectant is actually chlorine. In order to ensure the disinfection effect and the safety and hygiene of drinking water, water plants usually add chlorine and chlorine dioxide in excess of the disinfection dose to disinfect tap water. We can smell the residual chlorine in the water, which just shows that the water quality is safe and hygienic. Residual chlorine has no negative effect on human health, and can be basically eliminated after boiling, so residents can use it with confidence.