Simon Berry's team continues to act for the Waikato River Municipal Users Group ("WRMUG") in relation to Waikato Regional Plan Variation 6 ("RPV6") relating to water allocation in the region. WRMUG comprises all of the municipal authorities which take water from the Waikato River for the purposes of municipal supply (Watercare Services Limited, Waikato District Council, Waipa District Council, Hamilton City Council and Taupo District Council).

WRMUG supports a "portfolio" approach to allocation of water for municipal supply, which enables municipal supply authorities to address the water needs of towns and cities in accordance with comprehensive Water Conservation and Demand Management Plans as a matter of priority, a position which was upheld by the hearing committee appointed to determine the variation.

A number of major players (such as Carter Holt Harvey, Genesis, TrustPower and Horticulture New Zealand) oppose special provision for allocation for domestic and municipal supply and have appealed the RPV6 decision. Discussions are continuing between the parties and the appeals are scheduled to be heard early in 2011.