使用商用点预涂碳过滤器进行的实验表明，这些过滤器可以显著且持续地减少水中的异养平板计数（HPC）、大肠菌群、肠道病毒和原生动物囊肿。虽然预涂层过滤器中的银对HPC生物体的影响尚不确定，但银的存在显著降低了大肠菌群水平。铜在这些过滤器中的抗菌效果与银相似，但远低于银。包括32个参考文献、表格和图表。

Experiments conducted with commercial point-of-use precoat carbon filters showed that these filters can significantly and consistently reduce the heterotrophic plate count (HPC), coliforms, enteric viruses, and protozoan cysts in water. Although the effect of silver in the precoat filters on HPC organisms was inconclusive, the presence of silver dramatically reduced coliform levels. The antimicrobial effect of copper in these filters was similar to, but much less than, that of silver. Includes 32 references, tables, figures.