International Association of Hydrogeologists

Analysis

International Association of Hydrogeologists is a registered charity in England and Wales, based in Reading. It was registered in October 2000, 26 years ago. Its declared purposes cover education/training, arts/culture/heritage/science, environment/conservation/heritage and other charitable purposes, which this site groups under arts, culture, heritage and science. Legally it is a charitable company (Companies House number 03956233). It says it makes grants to individuals, makes grants to organisations and provides human resources.

In the financial year ending December 2025, International Association of Hydrogeologists reported income of £400k and spending of £346k, spending 87% of its income. Across the 5 years on record, from December 2021 to December 2025, income grew from £322k to £400k (+24%), an average of +5.6% a year. The sharpest change came in the year to December 2025, when income rose by 25%. Over the whole period it spent 92% of the income it received.

Among 17,634 England and Wales charities whose main cause is arts, culture, heritage and science and that reported income, International Association of Hydrogeologists sits at the 90th percentile: it is larger than about 90% of them. Against every charity in England and Wales with reported income it ranks in the 88th percentile. Charities of a similar size with the same main cause include Soco Music Project (£400k), The Fortescue Garden Trust (£401k) and Plymouth Culture CIO (£400k).