Tap water hardness in 19
We have published hardness data for 4 cities in 19. The median is 158 mg/L; the hardest water is in Corroios (232 mg/L), the softest in Lavradio (150 mg/L).
100 % of these cities have hard or very hard water (over 120 mg/L).
Portuguese operators report "dureza total" in mg/L CaCO₃ to ERSAR.
Cities in 19, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Corroios | 232 | 232 | very hard |
| Amora | 166 | 166 | hard |
| Barreiro | 150 | 150 | hard |
| Lavradio | 150 | 150 | hard |