Trigonometri : Journal Matematika dan Ilmu Pengetahuan Alam

Articles

Vol. 8 No. 1 (2025): Trigonometri : Journal Matematika dan Ilmu Pengetahuan Alam, ISSN 3030-8496

ANALISIS KUALITAS MIKROBIOLOGIS AIR MENGGUNAKAN METODE COLONY FORMING UNIT (CFU) DALAM IDENTIFIKASI BAKTERI Coliform dan Escherichia coli

Submitted
December 30, 2025
Published
2025-12-30

Abstract

Water is a basic human necessity, and its quality must meet health requirements, particularly from a microbiological perspective. The presence of indicator bacteria such as Coliforms and Escherichia coli reflects environmental contamination and indicates potential risks of waterborne diseases. This study aims to analyze the microbiological quality of water using the Colony Forming Unit (CFU) method to identify Coliforms and Escherichia coli at the UPTD Provincial Health Laboratory of West Sumatra. The CFU method was applied through membrane filtration using selective Chromocult agar, followed by incubation and enumeration of the resulting colonies. The analyzed samples included drinking water, clean water, and wastewater. The results demonstrated variations in bacterial colony counts among different types of water samples, indicating differences in the level of microbiological contamination. The detection of Coliforms and Escherichia coli in several samples suggests that not all water sources complied with established health standards. The CFU method proved to be an effective approach for monitoring the microbiological quality of water in support of public health protection efforts.

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