Kasarani, like much of peri-urban Nairobi, has continued to see steady population growth as new residents move in, new housing gets built, and existing compounds subdivide into more units than they originally held. This kind of growth has direct, largely predictable consequences for waste volume, and it's worth being explicit about how that shapes our own planning rather than treating growth as a surprise each time it becomes visible.

Why population growth and waste volume are directly linked

More residents in a given area produces, straightforwardly, more household waste in aggregate, even where individual household waste generation stays roughly constant. This is compounded in areas seeing housing subdivision — a single compound that once housed one family now housing several separate households generates meaningfully more total waste from the same physical footprint, often faster than infrastructure originally designed for the area's earlier population can absorb.

What we're seeing in areas we already serve

In several villages on our existing route, we've observed collection volume growing somewhat faster than our household count alone would predict, which we attribute at least partly to this kind of quiet densification — existing compounds housing more people than when we first assessed the area's needs. This has meant periodically reassessing staffing and route timing even in areas we've served for a while, not just when adding genuinely new villages.

How this factors into our expansion planning

When we're assessing whether to expand into a new village or add capacity to an existing one, we now try to account for likely near-term growth, not just current household counts, drawing on visible signs like ongoing construction and housing subdivision in the area. This is necessarily an imprecise exercise — we don't have access to formal demographic projections at the granularity we'd need — but even rough, direction-based planning has proven more useful than assuming current volume will remain stable indefinitely.

What this means for infrastructure decisions like the materials recovery point

Our planned materials recovery point, discussed in more detail elsewhere, is being sized with this growth trajectory in mind rather than purely against current volume. Investing in capacity that only just meets today's needs risks the facility becoming a bottleneck again within a relatively short time, given the growth pattern we're already observing across our existing service area.

What growth means for collector staffing and route design

Growing volume within existing villages has similar staffing implications to what we described in our piece on the Zimmerman sorting yard pilot — capacity that felt adequate at one point in time can become strained as volume grows, even without any formal expansion into new areas. We're trying to build periodic capacity review into our standard operations, rather than waiting for visible strain, like missed collections or overflowing buy-back points, to prompt a reactive response.

Why this is also a climate and public health consideration, not just a logistics one

Population growth outpacing waste management capacity is, in effect, exactly the gap that drives increased open dumping and the associated climate and health risks we've covered in our pieces on landfill emissions and open dumping near the Mathare basin. Planning proactively for growth is, in a real sense, preventative work against those specific downstream problems, not simply an internal operational concern.

What residents can do to help us plan better

  • Let us know if your compound has recently subdivided into more households, so we can factor that into route planning for your area.
  • Flag new housing developments near your area that might warrant future route consideration.
  • Continue participating consistently in segregation and collection, since usage patterns are one of our clearest signals for where growth is outpacing current capacity.

Why we're cautious about over-relying on visible construction as a signal

Visible construction activity is a useful but imperfect proxy for future population growth, since not all new building translates directly into additional households needing our specific collection services, and some growth happens through subdivision of existing structures without any visible construction at all. We treat construction activity as one input among several, alongside direct resident reports and observed collection volume trends, rather than relying on it in isolation.

Frequently asked questions

Does a growing population in my area affect my current collection service?

It can, if growth outpaces our current staffing for that area; if you notice service becoming less consistent, let us know so we can assess whether capacity needs adjusting.

How do you factor population growth into expansion decisions?

We look at visible signs like ongoing construction and housing subdivision alongside current household counts, aiming for a rough sense of near-term trajectory rather than precise demographic data we don't have access to.

Is this connected to your materials recovery point planning?

Yes, that facility is being sized with anticipated growth in mind, not just current volume, to avoid it becoming a bottleneck again soon after launch.

Read more about our infrastructure planning in our piece on the materials recovery point.