后沉淀是指水经过处理后，在配水系统中某些化合物的沉淀，在行业中也被称为腐蚀结核、沉积、结垢、生长、结垢、浮渣、沉积物和粘液。本文讨论了碳酸钙、铁（腐蚀）、铅、锌、铝、镁、锰、聚电解质和微生物生长后沉淀的原因、影响和预防。建议定期取样，以确定是否存在后沉淀问题。包括24篇参考文献。

Postprecipitation is defined as the precipitation of certain compounds in the distribution system after the water has been treated and is also referred to in the industry as corrosion-tubercules, deposition, encrustation, growth, scale, scum, sediment, and slime. This article discusses causes, effects, and prevention of postprecipitation of calcium carbonate, iron (corrosion), lead, zinc, aluminum, magnesium, manganese, polyelectrolytes, and microbiological growth. Periodic sampling is recommended to determine if postprecipitation problems are present. Includes 24 references.