Examining the pollution risk of industrial wastewater on streams : case study : Kinawataka stream in Nakawa-Ntinda Industrial area

Abstract

Water pollution from industrial effluents being on the rise in Uganda's water systems. Water is a basic resource for human life yet has been a route for epidemic diseases in the country, this study presents an in depth examination of pollution risk in Kinawataka stream. The examination is based on laboratory tests made on 10 week samples collected from two technically chosen sampling stations along the stream, Various parameters of industrial origin known to be prime causers and or indicators of pollution are presented together with various monitoring methods applied on streams mid their catchments. Statistical correlations among parameters and graphical comparisons of variation between parameters and against standard maximum permissible limits for effluents as set by NEMA were conducted. The study found out that most of these parameters are at very high concentrations of up to 10 times the maximum permissible limits set by the country's regulatory body parameters of great effect to the streams health and human health like lead were found in great concentrations at points near their industrial sources. However, 6 kilo meters downstream it was observed that most of the parameters except for to for total pH, and Nitrogen had lessened in. concentration owing to various processes discussed in the third chapter. This reduction in concentration was well below the maximum permissible limits for effluent discharge but 5tH.1presenteda possible high risk event as per the decision support tool presented in the fourth chapter. A multicriteria decision support tool for response to any pollution ever) by relevant authorities is presented for turbidity units 300 NTU and 300 NTU This report gives a proof of significant variation of parameters between sampling stations and provides that could use as a timely decision support tool to respond to pollution events in the country.