Water hardness in Sheffield
42 mg/L soft
Tap water in Sheffield is soft: 42 mg/L (2.5 gpg · 2.4 °dH · 4.2 °fH).
Source: Yorkshire Water — domestic drinking water quality (Stream open data, CC BY) (2026-10) · data checked 2026-10-19
Range across supply zones: 17–75 mg/L.
The tap water in Sheffield comes from Yorkshire Water, which draws on moorland reservoirs in the west, rivers, and boreholes that are concentrated in the east of the region. Reported hardness is 42.0 mg/L CaCO₃, ranging from 16.8 to 75.2 mg/L between supply zones. Reservoir water from moorland catchments carries little dissolved calcium, which keeps the water soft; limescale builds up slowly at this level, so descaling a kettle now and then is usually enough and a softener is rarely worthwhile.
UK suppliers report mg/L CaCO₃ and often Clark degrees (1 °Clark = 14.25 mg/L).
Water data
| Total hardness | 42 mg/L |
|---|---|
| Utility | Yorkshire Water |
How Sheffield compares
- Tap water in Sheffield is 77 % softer than the median of the 471 cities we track in the United Kingdom (185 mg/L).
- By hardness it ranks 410 of 471 in the United Kingdom (1 = hardest); 13 % of these cities have softer water.
- Nearest city with clearly softer water: Horbury, 31 km away (22 mg/L).
- Nearest city with clearly harder water: Treeton, 8 km away (116 mg/L).
Ranking of the hardest and softest water in the United Kingdom →
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 Sheffield
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °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 Sheffield water hard or soft?
It is soft: 42 mg/L as CaCO₃ (2.5 gpg, 2.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Sheffield safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. UK suppliers report mg/L CaCO₃ and often Clark degrees (1 °Clark = 14.25 mg/L).
How many grains per gallon is Sheffield water?
2.5 gpg, equal to 2.4 °dH, 4.2 °fH or 42 mg/L calcium carbonate.
What dishwasher salt setting should I use in Sheffield?
For 42 mg/L (2.4 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Sheffield?
No. With soft water a softener adds nothing.
Source
Source: Yorkshire Water — domestic drinking water quality (Stream open data, CC BY) (2026-10). Method: own measurement. Yorkshire Water — domestic drinking water quality (Stream open data, CC BY) · Outdated figure? Tell us