The International Association of Hydrological Sciences Limited

Analysis

The International Association of Hydrological Sciences Limited is a registered charity in England and Wales, based in Wallingford. It was registered in December 1999, 27 years ago. Its declared purposes cover education/training and environment/conservation/heritage, which this site groups under environment and conservation. Legally it is a charitable company (Companies House number 02676180). It says it provides services and acts as an umbrella or resource body.

In the financial year ending December 2025, The International Association of Hydrological Sciences Limited reported income of £253k and spending of £232k, spending 92% of its income. Across the 5 years on record, from December 2021 to December 2025, income grew from £214k to £253k (+19%), an average of +4.3% a year. The sharpest change came in the year to December 2023, when income rose by 24%. Over the whole period it spent 98% of the income it received.

Among 4,574 England and Wales charities whose main cause is environment and conservation and that reported income, The International Association of Hydrological Sciences Limited sits at the 86th percentile: it is larger than about 86% of them. Against every charity in England and Wales with reported income it ranks in the 84th percentile. Charities of a similar size with the same main cause include The Ethical Property Foundation (£251k), The Bentham-Moxon Trust (£255k) and Dunster Show Society (£251k).