Strengthening and supporting

Membership increased from 4543 in 2024 to 5067 in 2025. There were 665 students with free membership and 1205 students in total including paid-for memberships. We supported 244 members from low-income backgrounds with sponsored memberships, with costs for 136 members...

IAH’s 53 national chapters are voluntary groups that operate within their own national regulatory frameworks while upholding IAH’s principles and aims. Each chapter develops its own identity and activities—often with unique logos—and focuses on locally relevant talks,...

Education and Outreach is a vital part of IAH’s mission to further the understanding, wise use and protection of groundwater resources throughout the world. In 2025 we supported our commissions, networks and national chapters in running webinars by hosting the events...