I’d approach this as a small planning exercise rather than guessing by population alone. Start by walking your neighborhood at different times—morning commute, lunch, after school, evening, and weekends—and mark where people naturally stop, sit, eat, wait, or walk. Transit stops, parks, school gates, commercial strips, intersections, and busy corners usually need more attention than quiet residential blocks. If you can, use a simple map or spreadsheet to record existing bins, overflowing bins, litter hotspots, and long stretches with no bin at all.
Next, estimate how much waste each area actually produces. Check existing bins for overflow and how often they are emptied. A practical method is to sample a few busy bins over three to seven days, estimate the volume of waste collected, and compare it with nearby foot traffic. That gives you a rough “waste per person” or “waste per visit” figure. Then apply it to other similar locations. A simple planning formula is: required bins = daily waste volume × peak-use factor ÷ bin capacity × pickup frequency × fill target. Use a realistic fill target, such as 80%, and add a 10–20% buffer for events, weekends, and seasonal spikes.
Bin capacity and pickup frequency matter as much as the number of bins. A 120-liter bin emptied once a day is not the same as a larger bin emptied twice a week. For public bin placement, think in terms of walking distance and convenience. In high-traffic areas, bins may be needed every 50–100 meters; in quieter residential zones, every 200–300 meters may be enough, depending on local standards and observed litter. Also consider accessibility for collection crews, odor, vandalism, recycling separation, and maintenance costs.
I’d run a short pilot before buying bins for the whole neighborhood. Place a few bins in the busiest spots, track fill levels and overflow for two to four weeks, and ask residents or workers whether the locations make sense. Then adjust. The goal is not just more trash cans—it’s the right bin density, in the right places, emptied often enough to prevent overflow. Check your city’s waste management guidance as well, because local rules may already set public bin placement and service standards.