The document discusses barriers that prevent older people from accessing water and sanitation. It outlines interventions by HelpAge International to improve access, such as rainwater harvesting projects in India and borewell and toilet projects in Mozambique and Cambodia. These interventions have benefited thousands of older people and other community members by providing sustainable water sources and reducing health issues. The document calls for more data collection, policies, and community-based projects focused on water security for older populations.