In order to ensure the hygiene and safety of drinking water, it is necessary to control the following four indicators when monitoring drinking water:
1. Microbial indicators: indicators to measure microbial pollution in drinking water, such as the number of bacteria such as Escherichia coli;
2. Sensory characteristics and general chemical indicators of water: including sensory characteristics such as color, fragrance and taste of water, as well as chemical indicators such as PH value, dissolved oxygen and total hardness of water;
3. Toxicological indicators: control the content of toxic and harmful substances in water, such as heavy metals and organic substances;
4. Radioactivity index: the content of radioactive elements in water, including natural radioactivity and artificial radioactivity.
To sum up, the national drinking water standard is one of the basic measures to protect people's lives and health, which needs to be strictly implemented and constantly improved and adjusted to meet the needs of different regions and uses. There are other auxiliary detection indicators, such as nutritional indicators, stable isotope indicators, and prepared water quality indicators. Monitoring these indicators can reflect the health and safety of drinking water more comprehensively.
Legal basis:
"Measures for the supervision and administration of drinking water hygiene" Article 6
Drinking water supplied by water supply units must meet the national sanitary standards for drinking water.