In 2009, the quota allocated to municipal parks or gardens (20 million m3) was less than half of estimated consumption for that purpose in previous years (45 million m3). Demand management policies in the agricultural sector seek to accomplish two key objectives: to irrigate with non-potable water (effluent or natural brackish water) wherever possible, and to maximise efficiency in the use of irrigation water. First, there is a price incentive: for irrigation the price of treated domestic wastewater (USD 0.34/m3) is one-third that of potable water (about USD 1/m3).