in all these cases a clear target and transparent plan of action should be set over a longterm horizon in california the sustainable groundwater management act relies on semiautonomous management in groundwater bodies all groundwater bodies have to reach sustainability objectives by but they have the liberty to decide how to get there see box in the case of water quality risks denmark has been introducing a targeted regulation for nitrate pollution into groundwater imposing more strict oversight on farming zones that are more likely to lead to increased groundwater pollution hojberg