Control of the Water Quality of Antsidihy Lake Located in the District of Nosy-Be, Diana Region (Madagascar)

Abstract

For physical parameters: Conductivity the value found is 1031 µS / cm the limit value 100- 1000 µS / cm, the turbidity the value found is 0.78 NTU the maximum value <5 NTU, the pH is 6.96 the limit value between 6.5 - 9 and the temperature is 21 °C the maximum value <25 °C. So for the physical parameters perfectly meet the standards required for water intended for human consumption. For chemical parameters: the mineralization the concentration is 955 mg / L the limit concentration 1000 mg / L, the total hardness is 18.3 °f the maximum concentration 50 °f, the calcium is 20 mg / L the maximum concentration 100mg / L, magnesium is 1.46 mg / L the limit concentration 50 mg / L, potassium is 5.5 mg / L the required concentration <12 mg / L, sodium is 80.5 mg / L the limit concentration 200 mg / L, Chlorides is 124.5 mg / L the maximum concentration <250 mg / L, the iron is 0.015 mg / L the required concentration <0.02 mg / L and the Lead is 0, 01 mg / L the limit concentration 0.05 mg / L. For the chemical parameters the concentrations found are acceptable for international standards, despite the insufficiency of some concentrations compared to international standards, such as magnesium, potassium and calcium. For microbiological parameters: microorganisms at 36 °C is 1.005 NPP / mL compared to standards <100mL, Coliform bacteria is 0, Escherichia Coli is 0 and Intestinal enterococci is 0, the requirements for water intended for human consumption is zero. So the microbiological parameters of Antsidihy Lake water perfectly meet the standard required for drinking water.