IJSTR >> Volume 5 - Issue 10, October 2016 Edition

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AUTHOR(S)

Mahamat Seid A.M, Maoudombaye Theophile, Ahmat Altidjani, Mahamat Nour Sakine, Ndoutamia A. G.

KEYWORDS

manual drilling, N'Djamena / Chad, physicochemical quality, pumping stations of ETS, water

ABSTRACT

Water for consumption requires excellent physical, chemical and microbiological quality. This source of life is one of the most controlled food products. It must not only meet the quality requirements, but also must comply vis- à-vis a set of drinking water standards and must not contain any microorganism, no noise and no substance presents a potential danger to human health. This work was performed in the city of N'djamena and aims to assess the physico-chemical quality of the water pumping stations of the National Water Company in the city center and boreholes in human motor in neighborhoods peripheral devices. A total of 18 samples were collected, including 9 in the city center and 9 others in the suburbs. On each sample were determined physico-chemical parameters (potential of hydrogen (pH), temperature (T °), electrical conductivity, turbidity and calcium ions, magnesium, sulphates, fluorides, and nitrates). The results extend into the water pumping stations of ETS and manual drilling outlying districts respectively: temperature (28.0 to 36.1 ° C and 29.5 to 30.3 ° C); pH (6.5 to 8.5 and 6.3 to 7.6); electrical conductivity (201-671 ĩS / cm and 136-533 ĩS / cm); turbidity (NTU from 0.01 to 0.18 and 1.25 to 5 NTU); calcium (54 to 268 mg / L to 65-443 mg / L); magnesium (2.18 to 57 mg / L and 15 to 90 mg / L); sulfates (2 to 47 mg / L and 2 to 18mg / L); fluoride (0.0 to 0.61 mg / L and 0.12 to 0.98 mg / L) and nitrate (1.5 to 18, 2 mg / L and 0.1 to 0.6 mg / L). The results show that the contents of the parameters are consistent with the WHO standards for the quality of drinking water except calcium ions which their levels are high. Based on the parameters analyzed, the quality of water pumping stations of SNE and manual drilling is acceptable.

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