[Evaluation on the capability of testing total dissolved solids of the provincial centers for disease control and prevention].

Objective: To evaluate the Centers of Disease Control and Prevention's (CDC) provincial divisions' capabilities of detecting concentrations of organoleptic and physical parameter of total dissolved solids by adopging a quality control assessment methodology of interlaboratory comparison.

Methods: All laboratories had been divided into 2 groups of which contained 16 laboratories. Total dissolvedsolids' concentrations were assigned to 2 sample groups. Testing capabilities of the laboratories were evaluated through the use of robust statistical methods.

Results: Thirty-two CDC provincial divisions, including municipalities under the central government and in autonomous regions, participated in this interlaboratory comparison. Thirty laboratories obtained positive results, accounting for 93. 8%. Two laboratories' results were suspicious, accounting for 6. 2%. Finally, no laboratories produced outliers.

Conclusions: The majority of provincial CDC participants in this interlaboratory comparison are capable of testing the concentrations of total dissolvedsolidsin drinking water.