Physicochemical assessment of bottled water sold in Lagos metropolis, South-western Nigeria Onwordi, C.T 1 ., Gbotifa, A.O. 1 , Majolagbe, A.O. 1 , Afolabi, O.R. 1 , Ojewumi, A.W. 2 , Sobola, A.O. 1 , Farounbi, E.T. 1 , Osifeko, L.O. 1 , Ojuromi, O.T. 4 , Balogun, S.A. 1 , Rokosu, D.S. 1 , Abiade, A.A. 1 , Akinjokun, A. I. 3 and Omotsho, M.S. 5 1 Department of Chemistry, Lagos State University, Ojo, Lagos, Nigeria, 2 Department of Botany, Lagos State University, Ojo, Lagos, Nigeria, 3 Department of Chemical Sciences, Joseph Ayo Babalola University, Osun State Nigeria, 4 Department of Zoology and Environmental Biology, Lagos State University, Ojo, Lagos, Nigeria, 5 SMO Laboratory Services, Ibadan, Oyo State, Nigeria Sustainable Development Goal 6 aims to make safe, quality drinking water available to as many people as possible. In Lagos, Nigeria, packaged bottled water is one of the means used to provide safe drinking water for the populace. This study, therefore, seeks to assess the quality of Bottled water as a means to meet SDG 6 with Lagos as a case study. To achieve this goal, five (5) available bottled water products were sampled from each of the twenty local governments, yielding sixty-five (65) unique samples. The physicochemical parameters analysed for each sample using the American Public Health Association standard methods were: temperature, pH, electrical conductivity (EC), total dissolved solids (TDS), total hardness (TH), calcium, magnesium, chloride, total alkalinity, sulphate, sodium, potassium, manganese, cobalt, zinc, iron, copper and nickel. Wide divergent parameter value ranges were observed between the samples analysed. Temperature (25.2 - 29.5 oC); pH (3.73 - 8.57); EC (1.08 - 439 μS/cm); TDS (0.63 - 264 mg/L); TH (0 - 99.86 mgCaCO3/L); calcium (0 - 40.64 mg/L); magnesium (0 - 8.75 mg/L); Total alkalinity (12.2 - 305 mg/L); chloride (0 - 62.67 mg/L); sulphate (1.44 - 57.35 mg/L); sodium (0.17 - 62.76 mg/L); potassium (0.11 - 31.57 mg/L); manganese (0 - 0.17 mg/L); cobalt (<0.05 mg/L); zinc (0 - 9.32 mg/L); iron (0-5.19 mg/L); copper (0 - 0.96 mg/L); and nickel (<0.05 mg/L). The physicochemical parameters of the water samples were within the acceptable limits recommended by World Health Organization (WHO) and Nigerian Standard for Drinking Water Quality (NSDWQ), therefore consumption of the products by the masses is recommended. Continuous monitoring is necessary to ensure the safety of drinking water to humans in line with the Sustainable Development Goal. References 1. Nigerian Standard for Drinking Water Quality NIS 554, 2015. 2. UNW-DPAC. (2015). The Human Right to Water and Sanitation, Media brief. 50014 Zaragoza, Spain. 3. WHO-UNICEF-JMP. (2017). Progress on drinking water, sanitation and hygiene: 2017 update and SDG baselines. Switzerland: WHO Library Cataloguing-in-Publication Data. 4. WHO (2017). Guideline for drinking water quality: fourth edition incorporating the first addendum. Geneva
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