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Committee to study Ulsoor lake pollution
Why is it in news?
- The Southern Bench of the National Green Tribunal (NGT) has ordered the constitution of a joint committee to take water samples from Bengaluru’s Ulsoor lake and neighbouring areas to ascertain whether the lake is being polluted owing to illegal activity.
More in news
- Comprehensive analysis: The water analysis should include not only Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) limit, but also the Total Coliforms and Faecal Coliforms and also the presence of any heavy metals like Arsenic, Phosphorus, etc., NGT has ordered.
- What is BOD? Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
- What is COD?
(1) The chemical oxygen demand is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution.
(2) Chemical Oxygen Demand is an important water quality parameter because, similar to BOD, it provides an index to assess the effect discharged wastewater will have on the receiving environment.
Source
The Hindu