Kali Angke Overflow Causes Flooding in Kembangan, West Jakarta City to Build New 1 km Drainage Channel

West Jakarta Mayor Iin Mutmainnah stated that the flooding which submerged Jalan Outer Ring Road in Kembangan, West Jakarta, on Tuesday (5/5/2026) was caused by the overflow of Kali Angke. Upon directly inspecting the affected location, Iin explained that the flooding, which persisted from dawn until evening, was triggered by water from Kali Angke that could not be contained. “Yes, we visited the affected residents directly earlier. There, we went around inside. Regarding the flooding and long-standing puddles, we indeed see (the cause) from the overflow of Kali Angke,” Iin clarified to reporters at the site on Tuesday. That water channel is planned to be built along more than 1 kilometre and is targeted to be completed within the next four months. “One of our efforts is to create a channel. This channel must be done simultaneously and all at once or in parallel up to Kali Angke. So there is along 1,050 metres,” said Iin. Nevertheless, she asked residents to be patient because flood handling cannot be done instantly, especially amid Jakarta’s still high rainfall. “We hope this cannot be completed all at once, so this is indeed in process, but rain or overflow water comes back, thus causing impacts like this,” she stated. “This water management system has two inlets (channels) that flood Jalan Ring Road. The first is PHB Tunas Muda, and PHB Pasar Minggu. Now, Pasar Minggu has the largest inflow from Kali Angke,” revealed Mustajab. To address it, the Water Resources Sub-District Office plans to channel water to the edge of Jalan Ring Road towards Kali Angke with the support of a pumping system. “This solution is not just piecemeal; we must resolve Kali Angke itself. Kali Angke must be normalised by the central government. That will meet downstream, then we can handle it here. This must be done together, not just the Water Resources Sub-District Office alone,” he said. Mustajab also responded to residents’ complaints about the loss of water retention swamps, allegedly filled in for apartment development by developers. He assured that strict checks would be carried out on permits, including the obligation to provide water retention areas. Mustajab also acknowledged that the puddle pumping process has not yet been able to run optimally while the Kali Angke discharge is still high. “Pumping will continue to be done, but Kali Angke must recede first. Only when Kali Angke recedes can we dry it perfectly. (Currently) it is still high, quite high. The Kali Angke post is still on Alert Level 2,” stated Mustajab.