Water hardness in Segrate
27.4 °fH very hard
Tap water in Segrate is very hard: 27.4 °fH (274 mg/L · 16 gpg · 15.4 °dH).
Source: Gruppo CAP, analisi acquedotto (open data), 2025 Q3–2026 Q2 (2026-06) · data checked 2026-10-19
Range across supply zones: 190–347 mg/L.
Drinking water in Segrate is groundwater from CAP wells in the alluvial plain around Milan; the aquifer sediments release carbonate minerals, so hardness differs a little between wells. The figure we show, 274.3 mg/L CaCO₃, is calculated from the utility's published analyses, with readings from 189.7 to 346.7 mg/L, which counts as very hard water. Values differ across the area, so check your own address before buying a softener; limescale builds up quickly on heating elements and taps, so a softener or regular descaling is worth considering.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 27.4 °fH |
|---|
How Segrate compares
- Tap water in Segrate is 29 % harder than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 159 of 629 in Italy (1 = hardest); 75 % of these cities have softer water.
- In Lombardia it is number 45 of 142 cities; the regional median is 24.9 °fH.
- Nearest city with clearly softer water: San Donato Milanese, 9 km away (17.9 °fH).
- Nearest city with clearly harder water: Opera, 15 km away (34.9 °fH).
Ranking of the hardest and softest water in Italy →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Segrate
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| LG | H3 |
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 Segrate water hard or soft?
It is very hard: 274 mg/L as CaCO₃ (16 gpg, 15.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Segrate safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
How many grains per gallon is Segrate water?
16 gpg, equal to 15.4 °dH, 27.4 °fH or 274 mg/L calcium carbonate.
What dishwasher salt setting should I use in Segrate?
For 274 mg/L (15.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Segrate?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Gruppo CAP, analisi acquedotto (open data), 2025 Q3–2026 Q2 (2026-06). Method: computed from supplier's calcium and magnesium. Gruppo CAP, analisi acquedotto (open data), 2025 Q3–2026 Q2 · Outdated figure? Tell us