---
title: "Eutrophication: Causes, Effects & Control | Model Diplomat"
description: "Eutrophication is nutrient over-enrichment of water that causes algal blooms and oxygen depletion. Learn its causes, hypoxia, and UPSC GS3 relevance."
url: "https://modeldiplomat.com/learn/glossary/eutrophication"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Eutrophication is the enrichment of a water body with nutrients, chiefly nitrogen and phosphorus, that triggers excessive algal and plant growth and subsequent oxygen depletion.
- What is the difference between eutrophication and a dead zone?
- Why is phosphorus considered the key limiting nutrient in freshwater?
- How do internal loading and sediment release prolong eutrophication?
- Which Indian water bodies are commonly cited examples of eutrophication?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In August 2014, a Microcystis bloom on Lake Erie driven by eutrophication forced Toledo, Ohio, to ban tap-water use for roughly half a million residents for three days.

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