This is a Data Package in the Fiscal Spending standard for collecting open data about charitable organizations across major topical areas.
You can find an initial water dataset in the data folder. This is exported from an Airtable-based survey which can be accessed at https://opendata.ch/water
Just edit the CSV file, which you can do directly in GitHub, send a Pull Request and we'll sync it. Raise an Issue if you need help.
To update the data file using Airtable, select the Grid View (contact Oleg if you need access), click the ... menu and choose Download CSV. Rename it and copy into the data folder.
This Data Package is made available by its maintainers under the ODC Open Database License (ODbL), a copy of the full text of which is in LICENSE.md.