Water hardness in Portugal
77 cities with published hardness data, sorted by population. Median: 83 mg/L.
Median
83 mg/L
moderately hard
- 26 soft
- 42 moderately hard
- 7 hard
- 2 very hard
Portuguese operators report "dureza total" in mg/L CaCO₃ to ERSAR.
Ranking of the hardest and softest water in Portugal →
Regions
- 096 · 92 mg/L
- 1419 · 75 mg/L
- 173 · 96 mg/L
- 194 · 158 mg/L
- Aveiro6 · 97 mg/L
- Lisboa13 · 50 mg/L
- Porto14 · 98 mg/L
Largest places, hardest first
Every place is listed on its region page.
| mg/L | mg/L | ||
|---|---|---|---|
| Alcabideche · Lisboa | 289 | 289 | very hard |
| Corroios · 19 | 232 | 232 | very hard |
| Amora · 19 | 166 | 166 | hard |
| Lavradio · 19 | 150 | 150 | hard |
| Barreiro · 19 | 150 | 150 | hard |
| Arrentela · Setúbal | 141 | 141 | hard |
| Évora · Évora | 140 | 140 | hard |
| Espinho · Aveiro | 122 | 122 | hard |
| Portimão · 09 | 120 | 120 | hard |
| Santa Maria da Feira · Aveiro | 114 | 114 | moderately hard |
| São Domingos de Rana · Lisboa | 108 | 108 | moderately hard |
| Fânzeres · Porto | 100 | 100 | moderately hard |
| Campanhã · Porto | 98 | 98 | moderately hard |
| Aldoar · Porto | 98 | 98 | moderately hard |
| Senhora da Hora · Porto | 98 | 98 | moderately hard |
| Matosinhos · Porto | 98 | 98 | moderately hard |
| São Mamede de Infesta · Porto | 98 | 98 | moderately hard |
| Oliveira de Azeméis · Aveiro | 98 | 98 | moderately hard |
| Vila Nova de Gaia · 17 | 98 | 98 | moderately hard |
| Canidelo · Porto | 98 | 98 | moderately hard |
| Oliveira do Douro · Porto | 98 | 98 | moderately hard |
| Maia · Porto | 97 | 97 | moderately hard |
| Águas Santas · Porto | 97 | 97 | moderately hard |
| Porto · 17 | 96 | 96 | moderately hard |
| Lagos · 09 | 95 | 95 | moderately hard |
| Felgueiras · 17 | 94 | 94 | moderately hard |
| Faro · 09 | 92 | 92 | moderately hard |
| Quelfes · 09 | 92 | 92 | moderately hard |
| Loulé · 09 | 90 | 90 | moderately hard |
| Cascais · Lisboa | 90 | 90 | moderately hard |
| Estoril · Lisboa | 90 | 90 | moderately hard |
| Carcavelos · 14 | 90 | 90 | moderately hard |
| Portalegre · 16 | 87 | 87 | moderately hard |
| Pontinha · 14 | 86 | 86 | moderately hard |
| Moscavide e Portela · 14 | 86 | 86 | moderately hard |
| Camarate · 14 | 86 | 86 | moderately hard |
| Gondomar · Porto | 83 | 83 | moderately hard |
| Alvalade · Lisboa | 80 | 80 | moderately hard |
| Setúbal · Setúbal | 80 | 80 | moderately hard |
| Sete Rios · 14 | 76 | 76 | moderately hard |
| Parque das Nações · 14 | 76 | 76 | moderately hard |
| Areeiro · 14 | 76 | 76 | moderately hard |
| Ramada · 14 | 75 | 75 | moderately hard |
| Sacavém · 14 | 75 | 75 | moderately hard |
| São João da Talha · 14 | 75 | 75 | moderately hard |
| Santa Iria da Azóia · 14 | 75 | 75 | moderately hard |
| Marinha Grande · Leiria | 74 | 74 | moderately hard |
| Porto de Mós · 09 | 64 | 64 | moderately hard |
| Lisbon · 14 | 63 | 63 | moderately hard |
| Aveiro · Aveiro | 59 | 59 | soft |
| Loures · 14 | 58 | 58 | soft |
| Odivelas · 14 | 58 | 58 | soft |
| Queluz · 14 | 50 | 50 | soft |
| Cacém · 14 | 50 | 50 | soft |
| Algueirao · 14 | 50 | 50 | soft |
| Massamá · Lisboa | 50 | 50 | soft |
| Sintra · Lisboa | 50 | 50 | soft |
| Rio de Mouro · 14 | 50 | 50 | soft |
| Pombal · 13 | 46 | 46 | soft |
| Leiria · Leiria | 45 | 45 | soft |
| Oeiras · Lisboa | 42 | 42 | soft |
| Alfornelos · Lisboa | 42 | 42 | soft |
| Paço de Arcos · Lisboa | 42 | 42 | soft |
| Carnaxide · Lisboa | 42 | 42 | soft |
| Damaia · Lisboa | 42 | 42 | soft |
| Amadora · Lisboa | 42 | 42 | soft |
| Coimbra · Coimbra | 35 | 35 | soft |
| Santo António dos Olivais · 07 | 35 | 35 | soft |
| Braga · Braga | 34 | 34 | soft |
| Baião · Porto | 26 | 26 | soft |
| Chaves | 22 | 22 | soft |
| Ovar · Aveiro | 20 | 20 | soft |
| Vila Franca de Xira · 14 | 15 | 15 | soft |
| Guimarães · Braga | 12 | 12 | soft |