Abstract:
This study aims to evaluate the bacteriological quality of drinking water distributed in
the Ghardaïa region (Algeria) by analyzing 30 samples collected from various municipalities.
The analyses were performes according to standardized protocols from the Algerian Water
Company (ADE), focusing on key bacteriological indicators, such as total coliforms,
Escherichia coli, fecal streptococci, and sulfite-reducing anaerobic spores (ASR). The results
show high compliance with Algerian drinking water standards: 100% compliance for ASR
spores, 93.3% for total coliforms and E. coli, and 90.0% for fecal streptococci. However, the
occasional detection of E. coli and fecal streptococci—sometimes in significant
concentrations—indicates recent or persistent fecal contamination, posing a potential risk to
public health. These findings highlight the need to strengthen monitoring systems, protect
catchment areas, and optimize disinfection treatments. The study also recommends further
investigations and a holistic approach combining microbiological, physicochemical, and
hydrogeological analyses to ensure safe and sustainable management of potable water
resources
