对分布系统中的铸铁试验表面进行暴露，以确定悬浮微生物种群密度、氯胺残留量、流速、水温、选定的平均溶质浓度和附着微生物种群密度之间的关系。通过方差分析或线性相关分析，附着微生物的数量与水温和悬浮微生物数量密度直接相关，与氯胺浓度和最大流速间接相关。使用线性相关的统计分析表明，pH值、碱度、有机氮、氨、亚硝酸盐、硝酸盐、总磷酸盐、正磷酸盐或总有机碳与附着微生物种群密度之间没有很强的关系。包括17个参考文献、表格、图表。

Cast-iron test surfaces in a distribution system were exposed to ascertain the relationship between suspended microbial population density, chloramine residual, velocity, water temperature, and selected average solute concentrations and attached microbial population density. The population of attached microorganisms was directly related to water temperature and suspended microbial population density and indirectly related to chloramine concentrations and maximum velocity using either analysis of variance or linear correlation. Statistical analysis using linear correlation could demonstrate no strong relationships between pH, alkalinity, organic nitrogen, ammonia, nitrite, nitrate, total phosphate, orthophosphate, or total organic carbon and attached microbial population density. Includes 17 references, tables, figures.