Tap water hardness in Chiba
We have published hardness data for 11 cities in Chiba. The median is 76 mg/L; the hardest water is in Ichihara (86 mg/L), the softest in Kashiwa (65 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 Chiba, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Ichihara | 86 | 86 | moderately hard |
| Inzai | 81 | 81 | moderately hard |
| Chiba | 81 | 81 | moderately hard |
| Narita | 79 | 79 | moderately hard |
| Narashino | 76 | 76 | moderately hard |
| Funabashi | 76 | 76 | moderately hard |
| Urayasu | 75 | 75 | moderately hard |
| Ichikawa | 69 | 69 | moderately hard |
| Matsudo | 68 | 68 | moderately hard |
| Nagareyama | 67 | 67 | moderately hard |
| Kashiwa | 65 | 65 | moderately hard |