A LIGHT breeze was blowing on Untung Jawa Island, Thousand Islands regency, Jakarta, last Thursday. The sweet smell of flowers and the scent of breadfruit falling on sandy soil added fragrance to the air. Two waste water-processing installation (IPAL) units were rumbling, taking in and treating human and domestic waste.

“After being processed, sterilized liquid waste is dumped at sea,” said Rahmat Ayudi, an IPAL operator. Meanwhile, data fro