本研究考察了原水和过滤水中贾第虫和隐孢子虫的浓度、浊度和颗粒物，作为处理厂效率的指标。结果表明，在成品供水中检测到囊肿和卵囊的概率取决于原水中的微生物数量。颗粒计数是工厂性能的有用指标，可以指示过滤器何时不能正常工作。包括10个参考文献、表格和图表。

This study examines concentrations of Giardia and Cryptosporidium, turbidity, and particles in raw and filtered waters as indicators of treatment plant efficiency. Results indicate that the probability of detecting cysts and oocysts in finished water supplies depends on the number of organisms in the raw water. Particle counts are useful indicators of plant performance and can indicate when filters are not functioning properly. Includes 10 references, tables, figures.