An assessment of global groundwater quality is needed in response to the threats posed by anthropogenic and geogenic contaminants. This essay summarises the challenges involved, including a large number of potentially relevant water quality parameters, the poor availability of data in many regions and the complex nature of groundwater systems. Direct monitoring data can sometimes be augmented by indirect methods such as earth observations, and by involving citizen science. A new web portal is being developed to complement existing databases.

中文翻译：

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评估地下水质量的全球视角

为应对人为和地源污染物带来的威胁，需要对全球地下水质量进行评估。本文总结了所涉及的挑战，包括大量潜在的相关水质参数、许多地区的数据可用性差以及地下水系统的复杂性。直接监测数据有时可以通过间接方法（例如地球观测）和公民科学的参与来增强。正在开发一个新的门户网站以补充现有的数据库。