Bali’s aquifers have lost over 50 metres of groundwater depth in some areas in less than ten years. Wastewater infrastructure on the island processes less than ten per cent of the waste it generates. The average tourist uses between 2,000 and 4,000 litres of water per day. Water treatment investment in Indonesia addresses those pressures through two distinct enterprise types whose regulatory requirements differ at every level: the construction enterprise under KBLI Category F that builds water management infrastructure, and the operations enterprise that runs a water supply, water refill depot, or wastewater treatment facility. This article maps the compliance architecture for both, with Mud Sustainable Homes as the named construction enterprise. It also covers the GR 28/2025 sequential approval gate, the medium-high risk classification of KBLI 11052 for water refill depot operations, the SLHS sanitation certification from the local Dinas Kesehatan, the IPAT groundwater abstraction permit, and the advisory TraceWorthy has provided to protect a natural spring on a Bali property from commercial extraction by a multinational beverage corporation.