RGRWA provides a free listing service for those who need and those who have Rio Grande water for sale or lease. The RGRWA does not guarantee the information posted; all transactions must be approved by the Rio GrandeHID canal 2 Watermaster. Following are rules governing and forms required for Rio Grande water transactions. For more info on the sale of or contract for water, contact the Rio Grande Watermaster at 956-430-6056.