Current World Environment

Assessment and Management of Hebbal Lake, Bangalore: Water Quality, Pollution, and Restoration Strategies

Kodagahally Ramegowda Ravi Kumar¹²³ ^* and Spoorthi ¹

¹ DSIR Approved Research and Development Centre, Robust Materials Technologies Pvt Ltd, Nagarabhavi, Bangalore, Karnataka India

² VR Institute of Chemical, Biological and Information Technology Science, Bangalore, Karnataka India

³ Simposys Healthcare LLP, Naagarabhavi, Bangalore, Karnataka India

Corresponding author Email: env1@robustmaterials.com

DOI: http://dx.doi.org/10.12944/CWE.20.3.31

Abstract

Urban lakes are vital freshwater resources that support biodiversity, ecological balance, and human activities. Hebbal Lake, located in northern Bangalore, India, is a historically significant and ecologically important water body that faces challenges from urbanization, sewage inflow, and industrial discharge. This study assessed the water quality, microbial contamination, and heavy metal concentrations in lake sludge. Forty-nine water samples and four sludge samples were collected from different locations in the lake. Chemical parameters such as pH, nitrates, phosphates, fluoride, biochemical oxygen demand, and dissolved oxygen were analyzed along with microbiological parameters including total coliforms and Escherichia coli. Results indicated that most chemical parameters were within regulatory limits, while biochemical oxygen demand and coliform counts were high, reflecting eutrophication and fecal contamination. Sludge analysis revealed chromium slightly above permissible limits, whereas other heavy metals were within standard levels. An action plan is proposed involving boundary mapping, pollution source identification, eco-friendly rejuvenation techniques, and continuous monitoring. This study emphasizes the urgent need for scientific restoration and sustainable management of Hebbal Lake to maintain ecological integrity and water security.

Keywords

Heavy Metals; Hebbal Lake; Lake Rejuvenation; Microbial Contamination; Water Quality; Urban Lakes

Copy the following to cite this article:

Kumar K. R. R, Spoorthi S. Assessment and Management of Hebbal Lake, Bangalore: Water Quality, Pollution, and Restoration Strategies. Curr World Environ 2025;20(3). DOI:http://dx.doi.org/10.12944/CWE.20.3.31

Copy the following to cite this URL:

Kumar K. R. R, Spoorthi S. Assessment and Management of Hebbal Lake, Bangalore: Water Quality, Pollution, and Restoration Strategies. Curr World Environ 2025;20(3).

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