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Water quality worldwide

Statistics report on water quality worldwide

Water quality worldwide varies significantly depending on the final use of the resource, with safely managed drinking water access on the rise but, on the contrary, water bodies still suffering from precarious conditions. This report presents a compilation of statistics on the water quality worldwide. It looks into water pollution, water bodies' quality, safe drinking water, and the effects related to unsafe water consumption.

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Table of contents

Overview

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  • Basic Statistic Share of population with access to basic drinking water 2022, by region
  • Premium Statistic Global share of wastewater safely treated 2022, by region
  • Premium Statistic Regional sanitation coverage worldwide 2022, by facility type
  • Premium Statistic Proportion of water bodies with good quality worldwide 2023, by type

Water pollution

5
  • Premium Statistic Largest global oil tanker accidents 1967-2024, by quantity of spilled oil
  • Basic Statistic Global oil tanker spills volume 1970-2024
  • Premium Statistic Number waste items found in oceans worldwide 2024, by type
  • Premium Statistic Main litter types found in oceans worldwide 2021, by environment
  • Premium Statistic Global mismanaged plastic waste 2019, by destination

Water bodies

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  • Premium Statistic Proportion of water bodies with good quality worldwide 2023, by region
  • Premium Statistic Proportion of water bodies with good quality worldwide 2023, by leading country
  • Premium Statistic Proportion of water bodies with good quality worldwide 2023, by worst country
  • Premium Statistic Highest clean water scores worldwide 2025, by select country
  • Premium Statistic Lowest clean oceans scores worldwide 2025, by country

Safe drinking water

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  • Premium Statistic Global population with access to safely managed drinking water 2000-2022
  • Premium Statistic Share of global population using drinking water services 2015-2022, by source
  • Basic Statistic Quality of the world's drinking water supply 1990-2020
  • Basic Statistic Global urban and rural drinking water coverage 2022, by water source
  • Premium Statistic Regional populations without basic drinking water services worldwide 2000-2022
  • Basic Statistic Countries with lowest share of population with access to clean drinking water 2024

Health impact of poor water quality

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  • Basic Statistic Global death rate due to unsafe water 1990-2021
  • Premium Statistic Global death rate due to unsafe water 1990-2021, by region
  • Basic Statistic Global death rate due to unsafe water 1990-2021, by country
  • Premium Statistic Cholera - number of cases worldwide 2000-2022
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