Secondary Water Supply

The safety of drinking water quality is related to the health of residents, so the health department has issued strict laws and regulations to strengthen the detection and monitoring management of the drinking water. Each regulation has a clear request for the location of sampling points, inspection items and monitoring frequency of water supply, especially secondary water supply facilities.

Secondary water supply testing requirements

Health department clearly stipulates: water supply units should regularly test the quality and register the results of testing, water quality testing should be carried out by a third party qualified to test bear. The sampling points are set at the raw water inlet, the equipment outlet and the terminal water.

1.The sampling point is set at the raw water inlet, the equipment outlet and the terminal water.

2.Water Quality Inspection Items:

(1)Essential Items: Colority、pH、Turbidity、Odor and sapor、Visible matters（unaided eye）、Sulfate、Chioride、ammonia nitrogen、Nitrite-Nitrogen、Nitrate-Nitrogen、Volatile phenols、The chemical oxygen demand(COD)、The sum of calcium and magnesium、Iron(Fe)、Manganese(Mn)、Copper(Cu)、Lead(Pb)、Aerobic plate count、Total coliforms、Thermotolerant coliforms、Escherichia coli。

(2)Selected test items: If necessary, according to the type of water tank, disinfection method and other factors to add test items and disinfection by-products.

3.Frequency of monitoring annual inspection: once a year annually

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