Prestwich Water Hardness & Quality Report (2026)
Water Hardness
7.6°Clark10.9°fH6.1°dH
Source
mixed
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
267.9 mg/L
Est. Daily Cost
£0.25
energy & soap waste
Source: DWI Data Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Prestwich, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Prestwich | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6 yrs | 8.5 yrs | -29% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 11.3 yrs | 15 yrs | -25% |
Regional Water Comparison
How Prestwich compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Prestwich, North West | 108.5 mg/L | 7.6° | 🟡 Moderately Hard | mixed |
| Whitefield, North West | 73 mg/L | 5.1° | 🟡 Moderately Hard | mixed |
| Crumpsall, North West | 124.5 mg/L | 8.7° | 🟠 Hard | mixed |
| Salford, North West | 30 mg/L | 2.1° | 🟢 Soft | reservoir |
| Radcliffe, North West | 121 mg/L | 8.5° | 🟠 Hard | mixed |
National Benchmark
How Prestwich compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Prestwich | 108.5 mg/L | 🟡 Low |
| United Kingdom National Avg | 183 mg/L | 🔴 High |
| Livingston Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Prestwich's Water Unique?
Local geology and source profile
Prestwich, the leafy residential town in the Borough of Bury on the northern edge of Greater Manchester, is served by United Utilities. Supply to the north Greater Manchester area comes primarily from Pennine upland reservoirs including Wayoh, Entwistle and Jumbles Reservoirs in the West Pennine Moors, supplemented by the Thirlmere Aqueduct carrying Lake District water from Cumbria. Water is treated at Bury Water Treatment Works before distribution through the Bury Borough network. The River Irwell drains immediately west of Prestwich, and its catchment in the south Pennines consists predominantly of Carboniferous gritstone and shale, yielding naturally soft moorland runoff. Prestwich sits in one of the softer supply zones in Greater Manchester.
The Carboniferous Millstone Grit and Namurian shale of the Pennine uplands are silica-rich, calcium-poor formations that contribute very little dissolved calcium or magnesium to runoff. Reservoir water stored in the West Pennine Moors is therefore inherently soft. The modest hardness of 108.5 mg/L in Prestwich's supply reflects only slight mineral acquisition from limestone horizons at the southern Pennine margins and from the distribution network infrastructure itself. The TDS of 267.9 mg/L remains low, consistent with a largely moorland surface-water source.
At 108.5 mg/L Prestwich's water is moderately soft, which is good news for appliances and household surfaces. Limescale accumulates only gradually — kettles typically need descaling every six to eight weeks, and shower screens require occasional wiping rather than aggressive weekly treatment. Washing-up liquid lathers well with reasonable quantities. Combi-boilers and washing machines face low scaling risk and can function for many years without scale-inhibitor treatment, though a routine annual maintenance check is always sensible. Compared with chalk-belt towns in southern England, Prestwich residents enjoy significantly longer appliance lifespans and lower limescale maintenance costs.
Geology & Source: Supplied by United Utilities from Pennine upland reservoirs and the Thirlmere Aqueduct — predominantly soft moorland surface water from the Irwell and Irk catchments — produces moderately soft water at 108.5 mg/L (7.6°Clark).