http://www.guide2.com.au/popular/feed/184 en Array http://www.guide2.com.au/mind-body/recommended-daily-water-intake/13/69 <p>A sufficient water intake is needed to combat dehydration, which saps energy, causes fatigue and reduces concentration. The standard 'eight glasses a day' of water, which equates to two litres, has been widely reported as the recommended daily intake for water. </p>