Ruzi, I.I. , Ishak, A.R. , Abdullah, M.A. , Zain, N.N.M. , Tualeka, A.R. and Aziz, M.Y. 2023. Assessment of Heavy Metal Concentrations in Penang, Malaysia’s Wastewater Treatment Plants: A Wastewater-Based Epidemiology Approach. Trends in Sciences. 20, 5 (Feb. 2023), 6523. DOI:https://doi.org/10.48048/tis.2023.6523.