DonateWater Dataset: Youth-Driven Citizen Science on Water Access in Nigeria — Combined Dataset (Waves 1–3, 2023–2024)

A citizen science dataset capturing water source characteristics, quality, accessibility, and user experiences nationwide across Nigeria. Collected via the DonateWater mobile application across three waves: Wave 1 (October–November 2023), Wave 2 (November–December 2023), and Wave 3 (April–May 2024). Supports research on SDG 5 (Gender Equality), SDG 6 (Clean Water and Sanitation), and SDG 13 (Climate Action). This is the combined release superseding the standalone Wave 1 dataset (DOI: 10.5281/zenodo.19181609).