Tap water hardness in 09
We have published hardness data for 6 cities in 09. The median is 92 mg/L; the hardest water is in Portimão (120 mg/L), the softest in Porto de Mós (64 mg/L).
17 % 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 09, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Portimão | 120 | 120 | hard |
| Lagos | 95 | 95 | moderately hard |
| Faro | 92 | 92 | moderately hard |
| Quelfes | 92 | 92 | moderately hard |
| Loulé | 90 | 90 | moderately hard |
| Porto de Mós | 64 | 64 | moderately hard |