Tap water hardness in Saarland
We have published hardness data for 11 cities in Saarland. The median is 7.9 °dH; the hardest water is in Heusweiler (12 °dH), the softest in Merzig (4.1 °dH).
55 % of these cities have hard or very hard water (over 120 mg/L).
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Cities in Saarland, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Heusweiler | 12 | 214 | very hard |
| Wadgassen | 11 | 196 | very hard |
| Schmelz | 10.6 | 189 | very hard |
| Bexbach | 9.9 | 177 | hard |
| Saarlouis | 9.6 | 171 | hard |
| Beckingen | 7.9 | 141 | hard |
| Homburg | 6.4 | 115 | moderately hard |
| Sankt Wendel | 6.4 | 114 | moderately hard |
| Saarbrücken | 6.2 | 111 | moderately hard |
| Tholey | 5.6 | 100 | moderately hard |
| Merzig | 4.1 | 74 | moderately hard |