การประเมินคุณภาพน้ำดื่มจากตู้กดน้ำดื่มประเภทต่าง ๆ ในสถาบันการศึกษา

Abstract

The objective of this research was to evaluate the quality of drinking water from dispensers within an educational institution. A total of 29 drinking water samples were collected from various service points to analyze turbidity, acidity, alkalinity, total hardness, coliform bacteria, and E. coli. Theses parameters were then compared to standards for drinking water in sealed containers. The study results indicated that all drinking water samples had turbidity and pH levels within standard limits. However, 10% of the samples exceeded the standard limits for total hardness. During the random collection of 18 drinking water samples for microbiological quality analysis, 33% of the samples were found to be contaminated with coliform bacteria, and 22% were contaminated with E. coli. The evaluation of the hygiene of drinking water dispensers revealed that all dispensers were unhygienic in several aspects, particularly in terms of their location, adherence to drinking water quality standards, and maintenance and cleaning practices. Therefore, an educational institution should implement guidelines for monitoring water quality to ensure that students and staff have access to clean and safe drinking water.