Abstract
ABSTRACT Drinking water quality is one of the greatest factors affecting human health. The drinking water production process was investigated in 30 factories in Sakon Nakhon province, Thailand using hazard analysis and critical control points (HACCP) and water quality analysis. The results showed that the major hazards were pollution of the raw water source, final disinfection, personal hygiene of workers and drinking water quality. Overall, 28 samples contained total coliform bacteria, 23 samples were positive for fecal coliform bacteria and 16 samples contained Escherichia coli. These results suggested poor hygienic conditions in the water production process. To safeguard public health, more effort is required regarding a community program and strict regulation.
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