Water hardness in Leiria
45 mg/L soft
Tap water in Leiria is soft: 45 mg/L (2.6 gpg · 2.5 °dH · 4.5 °fH).
Source: SMAS de Leiria - Zona de Abastecimento Leiria (2026) · data checked 2026-10-23
Range across supply zones: 40–50 mg/L.
Leiria is supplied by its local water utility. Northern and central Portugal sit largely on granite and schist, which gives soft water, while limestone in the south and centre makes it harder. The reported hardness is 45.0 mg/L CaCO₃, with measurements from 40.0 to 50.0 mg/L. Kettles and heaters stay fairly clear of scale at this level.
Portuguese operators report "dureza total" in mg/L CaCO₃ to ERSAR.
Water data
| Total hardness | 45 mg/L |
|---|---|
| Utility | SMAS de Leiria |
How Leiria compares
- Tap water in Leiria is 46 % softer than the median of the 77 cities we track in Portugal (83 mg/L).
- By hardness it ranks 63 of 77 in Portugal (1 = hardest); 18 % of these cities have softer water.
- Nearest city with clearly softer water: Coimbra, 61 km away (35 mg/L).
- Nearest city with clearly harder water: Marinha Grande, 11 km away (74 mg/L).
Ranking of the hardest and softest water in Portugal →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Leiria
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Leiria water hard or soft?
It is soft: 45 mg/L as CaCO₃ (2.6 gpg, 2.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Leiria safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Portuguese operators report "dureza total" in mg/L CaCO₃ to ERSAR.
How many grains per gallon is Leiria water?
2.6 gpg, equal to 2.5 °dH, 4.5 °fH or 45 mg/L calcium carbonate.
What dishwasher salt setting should I use in Leiria?
For 45 mg/L (2.5 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Leiria?
No. With soft water a softener adds nothing.
Source
Source: SMAS de Leiria - Zona de Abastecimento Leiria (2026). Method: computed from supplier's calcium and magnesium. SMAS de Leiria - Zona de Abastecimento Leiria · Outdated figure? Tell us