According to the WHO, 88% of diarrheal
diseases are due to the use of unsafe water, sanitation
and hygiene problems. The quality of water depends on
the quality of ecosystems and the survival of species.
Water pollution therefore has an impact on human
health, the survival of ecosystems and an economic cost.
For nearly a decade, the distribution of drinking water
in Libreville and its surroundings has been disrupted.
Many households use rainwater, water from rivers or
water from wells to meet daily domestic needs. In order
to assess the quality of drinking water resources in
Libreville and its surroundings, certain biological and
physicochemical parameters are essential. Samples
from surface water and wells are shown, pollution of
industrial and faecal origin in the waters of the
Alinakiri, Ondongo and Ogombie rivers and in the wells
of the villages of Kango. In conclusion, the identification
of a large number of colonies, staphylococci, clostridium
coliforms, the concentration of nitrate and ammonium
ions above the values recommended by the WHO
confirms this contamination. Water is a component of
the environment most vulnerable to various
contaminations. Due to the growing demand, the
pressure on water resources has now become a global
strategic issue. Its management must imperatively be
integrated into a political perspective of sustainable
development. For this, the protection and safeguard, in
the medium and long term, of the quality of this
resource is essential.
water; indicator; pollution; sustainable development. I