Avaliação da água dos poços do bairro de Inhagome - Zambézia

Abstract

This work was carried out in the neighborhood of Inhangome in the city of Quelimane, in Zambézia province, as one of the best contaminant indicators present in the water of the wells of residences of the same neighborhood, This sample was placed in bottles of water with volume of 3 wells, totaling 3 samples, being placed in plastic bottles of 1.5 mL and stored in a container with ice in layers of water. The following parameters were set: Total Coliforms (CT), Escherichia coli by PETRIFILM and Amónia (𝑁𝐻 4+) Nitrates (𝑁𝑂 3−)and Nitrite (𝑁𝑂 2−) were used method methods 388N-free Ammonia, 361 N-Nitrate HR AV, 375N-Nitrite LR AV of the DR 900 HACH photometer manual respectively. For chloride analysis titration was used with indicator and the parameter pH was determined directly in the field through the instruments pH meter. The results obtained in the analyzes were observed that all these chemical parameters analyzed are within the admissible limits where for Ammonium found an average of 0.3-0.5mg/ l, Chloride observed a mean that ranged from 21-85.3mg/ l, Nitrate was 0-0.03mg/ l, Nitrite was observed a mean that ranged from 4.4-19.1mg / l, and finally the pH there was an average that varied from 6.6-7.7, for water from sources destined for public consumption without treatment according to what is recommended in Annex I of the law 16/91 in force in the country, which did not happen with the microbiological parameters where it was verified that all wells analyzed are contaminated by the bacteria of the group total coliforms with a mean of 17-91.2 NMP * 100 ml and well 2 and 3 with an average of 2-2 NMP * 100 ml are contaminated by E. coli bacteria. It has been observed that these wells are contaminated and their water is not is adequate to be consumed.