Checklist 4: Distribution System Hygiene

☐ Positive pressure maintained

The distribution network should maintain sufficient pressure at all times to prevent contaminants from entering through leaks or damaged pipes.

☐ Leaks identified and repaired

Leakage can increase contamination risks and reduce system reliability. Leak detection and repair programs should be implemented regularly.

☐ Stagnation areas identified

Low-flow sections, oversized pipelines, and dead-end sections may lead to water quality deterioration and should be monitored and managed.

☐ Network flushing performed

Regular flushing helps remove sediments, deposits, and stagnant water from the distribution system.

☐ Hygienic installation procedures followed

New pipelines, fittings, and components should be installed using approved hygiene procedures to prevent contamination.

☐ Pipelines disinfected after repairs

Following major repairs or new installations, affected sections should be cleaned, disinfected, and tested before being returned to service.

☐ Distribution system sampling conducted

Water quality should be monitored at representative locations throughout the network to verify that drinking water remains safe.

☐ Distribution network records maintained

Pipeline repairs, inspections, flushing activities, sampling results, and operational incidents should be documented and regularly reviewed.