Assessment of Water Quality at River Themi, Arusha, in Relation to Human Activities.

Chanai,, Amwene (2023) Assessment of Water Quality at River Themi, Arusha, in Relation to Human Activities. Masters thesis, The Open University of Tanzania.

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Abstract

Assessment of water quality at Themi River in relation to human activities in Arusha City was conducted in two seasons’ dry (October-November 2021) and rainy (March – April 2022) seasons. Water samples were collected by using special sterilized plastic containers at the designated points and hours. Measurements of pH, temperature, and dissolved oxygen were done at the site turbidity, TDS, TSS, Escherichia coli, and heavy metals (Zn, Ni, Fe, and Cu) were determined in the laboratory. Samples for laboratory analyses were stored and transported as appropriate. Water sampling was done while observing the different human activities along and within the river at each site. Temperature, pH, DO, turbidity, TDS and heavy metals (Zn, Cu, Ni, Fe, Pb) did not exceed WHO drinking water standards while presence of E. coli and TSS makes the water from River Themi not suitable for human use. Presence of E.coli and TSS is indicative of human activities along the river, which generate more pathogens and suspended solids. There is a need to raise awareness among water users on proper use of water resources. In addition, continuous and regular monitoring of the river health by Pangani Water Basin management is proposed. Keywords: Water Quality, Water Temperature and Water Pollution in Relation to Human Activities

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