Evaluation of the Physico-Chemical Quality of Well Water in the Analamanga Region (Antananarivo), Madagascar

Vololonome Bodomalala Razanadrasoa (University of Antananarivo, Process Engineering and Industrial, Agricultural and Food Systems, BP 906 Antananarivo 101, Madagascar)
Jean Rasoarahona (University of Antananarivo, Process Engineering and Industrial, Agricultural and Food Systems, BP 906 Antananarivo 101, Madagascar)
Rado Rasolomampianina (University of Antananarivo, Process Engineering and Industrial, Agricultural and Food Systems, BP 906 Antananarivo 101, Madagascar)
Narindra Ratiarimananjatovo (University of Antananarivo, Process Engineering and Industrial, Agricultural and Food Systems, BP 906 Antananarivo 101, Madagascar)
Rabearisoa Solotiana Rija (University of Antananarivo, Process Engineering and Industrial, Agricultural and Food Systems, BP 906 Antananarivo 101, Madagascar)
Muhammad Ridwan (Universitas Negeri Islam Sumatera Utara, Indonesia)
Koto-Te-Nyiwa Ngbolua (Department of Biology, Faculty of Science, University of Kinshasa, Democratic Republic of the Congo)
Robijaona Rahelivololoniaina Baholy (University of Antananarivo, Process Engineering and Industrial, Agricultural and Food Systems, BP 906 Antananarivo 101, Madagascar)

Budapest International Research in Exact Sciences (BirEx Journal)
Vol 4, No 2 (2022): Budapest International Research in Exact Sciences, April

The study made in some sites of the Analamanga Region, which are the Fokontany of Mandroseza, Ampanefy, Isaingy, Antalata and Malaho, shows the deterioration of the physico-chemical quality of the water of well. Elements that can cause illnesses for the beneficiaries are detected. The result is marked firstly by the acidity of the well water in all the Fokontany studied, secondly, by the rise in the rates of ammonium and organic matter in the wells which are located in the vicinity of several houses and those of nitrites in samples from wells located in the slums, near fields and rice paddies. Finally, for the Fokontany of Isaingy which is characterized by a very high number of hearths compared to other Fokontany, the waters of the wells are turbid and contain high levels of organic matter, total iron and nitrites.