1. 1. World Health Organization, Guidelines for drinking-water quality: recommendations (Vol. 1). World Health Organization, 2004.
2. 2. Odonkor, S.T. and Addo, K.K., Microbiological Quality of Water Sources from the Largest District in Greater-Accra Region, Ghana: A Call for Innovational Schemes towards Rural Water Resources Management. International Journal of Science, Environment and Technology, 2013; 4: pp.536-555.
3. 3. Park K. Environment and Health in: Park's Textbook of preventive and social medicine, 2002. Christelis, G. and Struckmeier, W. Groundwater in Namibia, an explanation to the Hydrogeological Map. Namibia: Layout and production, 2011.
4. 4. Christelis, G. and Struckmeier, W. Groundwater in Namibia, an explanation to the Hydrogeological Map. Namibia: Layout and production, 2011.
5. 5. Proctor, C.R., Dai, D., Edwards, M.A. and Pruden, A. Interactive effects of temperature, organic carbon, and pipe material on microbiota composition and Legionella pneumophila in hot water plumbing systems. Microbiome, 2017; 5(1): pp.130. https://doi.org/10.1186/s40168-017-0348-5