Just wrapped Day Zero Festival 2026 in Bali. Thought this community might appreciate the numbers.
The setup: 60 dry-composting wooden toilets. No plumbing. No chemicals. No water connection whatsoever. Just the toilet, local Balinese sawdust (0.5 kg added after each use), and a sealed container underneath.
What came out the other side:
- 36,000 total uses across the festival
- 18,000 kg of compost produced
- 0 litres of water used (standard flush would have used 216,000–360,000 litres for the same number of uses)
- ~27 tonnes CO2e avoided vs. chemical toilets — equivalent to about 1,240 mature trees working for a year
The compost goes straight to our flower farm. The flowers grown from it get gifted back to festival guests at the next event. The loop closes completely.
Sawdust sourced from local Balinese woodworking workshops — material that would otherwise be discarded.
I'm the founder of the company (Ecoranah, based in Bali) so obviously I'm biased — but happy to answer any questions about the system, the composting process, how we handle pathogens, logistics, anything.
