The Msimbazi river flows across Dar es Salaam City from the higher areas of Kisarawe in the Coastal region and discharges into the Indian Ocean. Because of its location, the river ahs been an important resource for residents in the Dar es Salaam city in various ways. Additionally, the river has been abused by different sectors as a dumping site for effluent and other pollutants produced by the city. As a consequence of the high levels of pollution, the river’s water quality has sharply decreased, and is no longer safe for consumption, domestic uses, or even irrigational uses.

Studies have indicated high levels of heavy metal in the river, run-off from local industry. Additionally, toxins in the river are also attributable to the presence of a waste dump site besides the river in Vingunguti area, which continually leaks greater and greater degrees of effluent into the water. A local abattoir located near the river is another significant source of discharge into the water. Sources of pollution from domestic households include poor sanitation systems mainly from septic tank and pit latrines that are used by about 85% of the city population. Agricultural activities using manure and fertilizers both in the basin and at the beds of the river have made the pollution problem more complicated. Ultimately, it is clear that the sources of pollution impacting the river are quite numerous and diverse.

So far, several stakeholder groups have gotten involved with this issue. Stakeholder groups, each with a particular focus, have taken the first steps towards intervening in this clear environmental hazard. For example, LEAT successfully filed a case in court to forbid the dumping of waste in the Vingunguti area. Enviropro, another Dar es Salaam based organization, worked to improve the abattoir. Such efforts are isolated however, and primarily prevent further contamination more than remediate the problem such that it currently exists. It is necessary at this point to synchronize the efforts of all interested parties, to maximize their overall effect.

The Kafue River Basin in the Chingola District, Zambia has experienced heavy polluting over the past several decades. Konkola Copper Mines (KCM) is the primary source of this pollution, disposing of industrial waste products and various bio-chemical substances directly into the reservoirs. They are not the only polluters, however, as the region is home to roughly 40% of the nation’s socio-economic activity; a range of other industries are also at fault for the current state of the river basin: pulp-and-paper mills, fertilizer factories, granulation plants, abattoirs, textile manufacturers, and more. More than 93,000 tons of industrial waste are produced annually, most of which finds it way into the Kafue River. From there it flows into the Zambezi River – Africa’s fourth largest – that claims Zambia as its source and winds through Angola, Namibia, Botswana, Zimbabwe, and Mozambique before eventually emptying out into the Indian Ocean.

As a result of the pollution, the steadily increasing population in the Chingola District face severe water shortages. The full extent of the environmental impact has not yet been determined, but because of significant habitat destruction and land/soil degradation, the cost to local ecosystems is likely quite high. The color of the brilliantly blue Kafue River has slowly turned green. Indigenous fish have developed an unusual and unpleasant odor. Aquatic weeds dumped by some facilities into the river system, combined with nitrogen and phosphate waste from other facilities, together degrade biodiversity.

Both aquatic life and human health are in danger. High incidences of environmentally mediated disease, such as gastro-enteritis, intestinal worms, and diarrhea diseases mostly in children have been reported from communities around the river and have been linked to drinking water from certain parts of the river. The raw sewer pollution of Kafue River could inadvertently lead to outbreaks of epidemics like cholera.