Tap water hardness in Fukuoka
We have published hardness data for 3 cities in Fukuoka. The median is 45 mg/L; the hardest water is in Kurume (45 mg/L), the softest in Fukuoka (39 mg/L).
0 % of these cities have hard or very hard water (over 120 mg/L).
Japanese waterworks report hardness (硬度) in mg/L CaCO₃; the standard is 300 mg/L and the target 10–100 mg/L.
Cities in Fukuoka, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Kurume | 45 | 45 | soft |
| Kitakyushu | 45 | 45 | soft |
| Fukuoka | 39 | 39 | soft |