ISO/TS 20612:2007规定了在水、废水和污泥分析领域通过实验室间比较进行能力验证的相关标准。特别是，它规定了有关能力测试提供者以及实验室能力比较的设计、执行和评估的要求。 如果实验室间试验中的测定物被认为能够以一定程度的连续性进行测量，则可使用ISO/TS 20612:2007。这通常适用于化学成分和物理化学测定物，但生物和/或微生物测定物并不总是存在连续性。

ISO/TS 20612:2007 specifies the criteria related to proficiency testing by interlaboratory comparisons in the field of water, waste water and sludge analysis. In particular, it specifies the requirements in respect to proficiency test providers and to the design, execution and evaluation of laboratory proficiency comparisons. ISO/TS 20612:2007 may be used if the determinands in the interlaboratory test may be regarded as capable of measurement with a certain degree of continuity. This is generally the case for chemical constituents and physicochemical determinands, but continuity does not always exist in the case of biological and/or microbiological determinands.