Tanzania, March 27 -- Dar es Salaam. As Tanzania's commercial capital continues to expand at a rapid pace, the battle to keep the city clean is increasingly exposing a hard truth: municipal efforts alone are not enough.

From clogged drainage systems to polluted water channels, poor urban sanitation has become one of the most visible and persistent challenges facing cities like Dar es Salaam.

With a population now exceeding six million, waste management systems are under pressure, often overwhelmed by unplanned settlements, rapid urbanisation and limited infrastructure investment.

It is in this context that private sector players are beginning to emerge as critical actors-not just supporters-in shaping cleaner and healthier urban enviro...