Open data
The hardness figures of countries whose official sources allow reuse are available as CSV: one row per place, mg/L CaCO₃, local unit, method, source and date.
| File | Places | Licence of the source |
|---|---|---|
| France (fr.csv) | 33,641 | Licence Ouverte 2.0 (Ministère de la Santé, SISE-Eaux) |
| Denmark (dk.csv) | 388 | CC BY 4.0 (GEUS) |
Columns: country, slug, name, region, population, lat, lon, hardness_mg_l, method, source_name, source_url, source_date.
Please credit "Water Hardness Atlas" with a link and keep the original source in each row.