All-Wales NVZ will 'kill off' small dairy farms, union warns 1 March 2021 | A nitrate vulnerable zone (NVZ) designation will be rolled out across Wales New water regulations planned for Wales will 'kill off' family dairy farms and boost industrial scale dairy production, according to a farming union. The Farmers' Union of Wales’ (FUW) has warned that tenants, young farmers and small family farms are at risk of the plans, to be rolled out this year. The Welsh government will introduce a nitrate vulnerable zone (NVZ) designation across the whole of Wales in a move that has angered industry groups. NVZs are areas within Wales that contain surface water or groundwater susceptible to nitrate pollution from agricultural activities.