Masii town in Machakos County is experiencing rapid growth as a commercial hub, driven by its strategic location and increased trade, but this expansion is outstripping essential infrastructure development, particularly sanitation.

• The town's rapid transformation has led to a surge in population and businesses, replacing older structures with modern developments.
• A critical issue is the absence of a proper sewerage system, leading to open drainage and potential public health risks.
• Key drivers of growth include its position along the busy Machakos–Kitui road, attracting travellers and fueling businesses, alongside the presence of educational institutions like Masii Boys High School and AIC Masii Girls High School, and expanding financial services.