Nitrobenzene can rapidly deteriorate the quality of groundwater.

硝基苯污染可使地下水环境质量急剧恶化。

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The quality of groundwater has been reflected by the basic condition and pollution.

地下水水质基本状况和污染程度反映了地下水环境质量的好坏。

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Groundwater is a part of nature environment. Mans activity can impact the quality of groundwater.

地下水是自然环境的组成部分，人类活动会导致地下水质的变化。

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The degradation of water quality in surface and groundwater systems is further exacerbating water scarcity and negatively impacting our natural environment and the ecosystem services and goods that it provides, jeopardizing food security and livelihoods.

UNESCO: World Water Day 22 March 2010: Clean Water for a Healthy World

But despite this, knowledge about the impact of climate change on groundwater quantity and quality is limited.

UNESCO: THEMES

In developing the thematic area, UNESCO is a leader in the areas of: transboundary surface and groundwater, water quality, integrated water resource management and climate change adaptation and water.

UNESCO: at the Sixth World Water Forum