Water stress - You can edit this 
Water stress occurs when the demand for water exceeds the available amount during a certain period. Water stress causes deterioration of fresh water resources in terms of quantity (aquifer over-exploitation, dry rivers) and quality (eutrophication, organic matter pollution, saline intrusion.)
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Water stress occurs when the demand for water exceeds the available amount during a certain period or when poor quality restricts its use. Water stress causes deterioration of fresh water resources in terms of quantity (aquifer over-exploitation, dry rivers, etc.) and quality (eutrophication, organic matter pollution, saline intrusion, etc.). Source: http://epaedia.eea.europa.eu/alphabetical.php?letter=W&gid=108#viewterm