Water pollution is a serious problem in big cities, impacting the livelihood and the well-being of the urban population. In general, water pollution can be divided into two based on the area of impact, which are surface water pollution and groundwater pollution. These two kinds of pollution are related, as surface water can seep through the soil pores and vice versa. Back then, water pollutants are mostly in the forms of heavy metals and organic substances from agricultural and industrial activities. However, recently microplastics become alarming pollutants due to the higher use of plastic containers and substances in daily life. COVID-19 has also caused higher plastics amount in the waterways and coastal areas.