国家标准《水回用导则 再生水分级》 由TC442（全国节水标准化技术委员会）、全国环保产业标准化技术委员会联合归口 ，主管部门为国家标准委。

The national standard "Guidelines for Water Reuse - Classification of Reclaimed Water" is jointly managed by TC442 (National Water Conservation Standardization Technical Committee) and the National Environmental Protection Industry Standardization Technical Committee, with the National Standards Committee as the competent department.