本文研究了五个小型城市供水系统中丝状真菌和酵母的发生情况。在总共207个样本中，103个（49.8%）对真菌呈阳性。计数范围为每50毫升样本1到6个菌落形成单位（cfu）。每个阳性样本的平均计数为5.5 cfu，不同系统中的住宅抽头平均在1.3到1.9 cfu之间。原水（每个样本11.0 cfu）、储罐水（每个样本20.0 cfu）和消防栓水（每个样本5.8 cfu）的平均计数最高。在1.0和2.0 mg/L的范围内氯化，可使大多数真菌繁殖体失活。58%的菌株来自四个属:链格孢菌、曲霉、枝孢菌和青霉。 真菌的存在与各种理化和细菌学参数之间没有显著相关性。包括20个参考文献和表格。

This article deals with the occurrence of fungi, both filamentous and yeast, in five small municipal water distribution systems. Of a total of 207 samples, 103 (49.8 percent) were positive for fungi. Counts ranged between 1 and 6 colony forming units (cfu) per 50-mL sample. The average count per positive sample was 5.5 cfu, with residential taps in the different systems averaging between 1.3 and 1.9 cfu. Highest average counts were observed in the raw water (11.0 cfu per sample), storage tank water (20.0 cfu per sample), and fire hydrant water (5.8 cfu per sample). Chlorination in the range of 1.0 and 2.0 mg per L inactivates most of the fungal propagules. Fifty-eight percent of the isolates were from four genera: Alternaria, Aspergillus, Cladosporium, and Penicillium. No significant correlations were found between the presence of fungi and various physiochemical and bacteriological parameters. Includes 20 references, tables.