Water hardness in Odivelas
58 mg/L soft
Tap water in Odivelas is soft: 58 mg/L (3.4 gpg · 3.2 °dH · 5.8 °fH).
Source: SIMAR Loures-Odivelas - Divulgacao dos dados da qualidade da agua, relatorio 2.o trimestre 2026, zona LO1 (2026-09) · data checked 2026-10-21
Range across supply zones: 53–63 mg/L.
Odivelas is listed in zone LO1 of SIMAR Loures-Odivelas, shared with Loures. The Q2 2026 report gives two hardness analyses, 53 and 63 mg/L CaCO₃. The 58 mg/L shown is their midpoint. Neighbouring zones, such as the one serving Caneças, did not print hardness in 2026, so this figure applies to LO1 only. Soft water means little scale in appliances.
Portuguese operators report "dureza total" in mg/L CaCO₃ to ERSAR.
Water data
| Total hardness | 58 mg/L |
|---|---|
| Utility | SIMAR Loures-Odivelas (Zona de Abastecimento LO1, Zona 1) |
How Odivelas compares
- Tap water in Odivelas is 30 % softer than the median of the 77 cities we track in Portugal (83 mg/L).
- By hardness it ranks 53 of 77 in Portugal (1 = hardest); 30 % of these cities have softer water.
- In 14 it is number 13 of 19 cities; the regional median is 75 mg/L.
- Nearest city with clearly softer water: Alfornelos, 4 km away (42 mg/L).
- Nearest city with clearly harder water: Ramada, 1 km away (75 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 Odivelas
| 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 Odivelas water hard or soft?
It is soft: 58 mg/L as CaCO₃ (3.4 gpg, 3.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Odivelas 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 Odivelas water?
3.4 gpg, equal to 3.2 °dH, 5.8 °fH or 58 mg/L calcium carbonate.
What dishwasher salt setting should I use in Odivelas?
For 58 mg/L (3.2 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Odivelas?
No. With soft water a softener adds nothing.
Source
Source: SIMAR Loures-Odivelas - Divulgacao dos dados da qualidade da agua, relatorio 2.o trimestre 2026, zona LO1 (2026-09). Method: computed from supplier's calcium and magnesium. SIMAR Loures-Odivelas - Divulgacao dos dados da qualidade da agua, relatorio 2.o trimestre 2026, zona LO1 · Outdated figure? Tell us