Bengaluru: BBMP officials have reported a significant decrease in sewage flow into the Koramangala stormwater drain, from 120 million litres per day (MLD) to around 8 MLD, after the initiation of the K-100 Urban Waterway Project. Despite this claim, local residents and businesses near the drain contend that the foul odor persists, and sewage-mixed water is still evident.

The K-100 project, aimed at revamping the drain infrastructure, spans a 9.2-km stretch from KR Market to Bellandur Lake, with a government allocation of Rs 175 crore. The BBMP engineering team anticipates completion by the end of 2024. To prevent sewage from entering the Koramangala Rajakaluve, a 5 MLD capacity sewage treatment plant has been set up at Kumbaragundi near Kalasipalya. Additionally, concrete rings have been placed in the middle of the rajakaluve near Shantinagar to absorb sewage naturally.

Meanwhile, BWSSB is constructing another sewage treatment plant near Shantinagar, expected to be operational by the year's end. This facility will further mitigate sewage influx into the rajakaluve. Retaining walls, ground-level bridges, decorative lighting, landscaping, pedestrian pathways, and other infrastructure elements have been completed. Service roads with pipelines have been constructed along the rajakaluve to prevent rainwater runoff. The BBMP initiated the project in 2021 with the goal of improving the environmental conditions in the area.It was supposed to be completed by 2023, but it missed several deadlines.