In Bengaluru, officials from BBMP have reported that the sewage flowing into the Koramangala stormwater drain has decreased significantly from 120 million litres per day to about 8 MLD after the initiation of the K-100 Urban Waterway Project. Despite this claim, nearby residents and businesses continue to express concerns about the foul odor coming from the water and the ongoing presence of sewage. The K-100 project, funded by the government with Rs 175 crore for drain infrastructure redevelopment, spans a 9.2-km stretch from KR Market to Bellandur Lake. The project, managed by BBMP's engineering division, is scheduled for completion by 2024.
To prevent sewage from entering the Koramangala Rajakaluve, officials have established a 5 MLD capacity sewage treatment plant at Kumbaragundi near Kalasipalya. Additionally, interventions such as installing concrete rings and planting vegetation along the rajakaluve near Shantinagar aim to absorb and naturally purify the sewage-infused water. BWSSB is also constructing a sewage treatment plant near Shantinagar, expected to be operational by the end of the current year.
BBMP highlights completion of infrastructure enhancement activities, including retaining walls, ground-level bridges, decorative lighting, landscaping, granite fixtures, pedestrian walkways, and grills. Service roads have been built on both sides of the rajakaluve, accompanied by pipelines to prevent rainwater from entering the stormwater drain. BBMP initiated the project in 2021 with the goal of completely halting sewage inflow into the rajakaluve.To finish it by 2023, the project later failed to meet multiple deadlines.