Home Conservation Business Conservation Water Stewardship Water conservation heroes Uisce Éireann Your privacy settings Allow miscellaneous cookies to play. Accept and play video DAA DAA is a global airport and travel retail group with businesses in 16 countries. DAA is owned by the Irish State and headquartered at Dublin Airport. Benefits of Certified Water Stewardship The Certified Water Steward Programme gives people a structured approach to water management. Wins Over the last 9 years, we have achieved a 40% decrease in our water usage, despite passenger numbers increasing by 40%.