1. Water source environment: As an ecologically livable city, Kunming has a good water source environment. The main water source of Kunming Water Supply Corporation is Dianchi Lake, and the water quality is relatively clean.

2. Technical treatment: After the water source is collected, the large barrel water in Kunming will be chlorinated and disinfected to ensure the sanitation and safety of the water source. At the same time, Kunming Water Supply Corporation also strictly monitors and tests the water quality to ensure that the water quality meets the relevant national standards.