Denton Water Hardness & Quality Report (2026)
Water Hardness
~200–300 mg/L
Hardestimated · not lab-verified
Source
mixed
pH Level
8.1
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
360.7 mg/L
Est. Daily Cost
£0.57
energy & soap waste
Source: DWI Data Portal · Updated 2026
0–99
mg/L
Soft
100–149
mg/L
Slightly Hard
150–199
mg/L
Moderately Hard
200–300
mg/L
Hard
300+
mg/L
Very Hard
Appliance Damage Report
In Denton, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In Denton | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.7 yrs | 8.5 yrs | -33% |
| Washing Machine | 8 yrs | 12 yrs | -33% |
| Water Heater | 10 yrs | 15 yrs | -33% |
Regional Water Comparison
How Denton compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Denton, North West | ≈ 200–300 mg/L | 17.5° | 🟠 Hard | mixed |
| Dukinfield, North West | ≈ 0–100 mg/L | 10.5° | 🟢 Soft | mixed |
| Droylsden, North West | ≈ 0–100 mg/L | 10.9° | 🟢 Soft | mixed |
| Ashton-under-Lyne, North West | ≈ 0–100 mg/L | 14° | 🟢 Soft | mixed |
| Hyde, North West | ≈ 0–100 mg/L | 13.1° | 🟢 Soft | mixed |
National Benchmark
How Denton compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Denton | ≈ 200–300 mg/L | 🟠 High |
| United Kingdom National Avg | 177 mg/L | 🟡 Moderate |
| Skipton Top Rated | 7.1 mg/L | 🟢 None |
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What Makes Denton's Water Unique?
Local geology and source profile
United Utilities draws its water from a blend of sources to supply the Denton area. A significant portion comes from the Longdendale Valley Reservoirs, specifically Woodhead, Torside, and Rhodeswood. Additionally, groundwater from the Triassic sandstone formations along the Tameside fringe contributes to the supply. This mixed source approach aims to provide a consistent and reliable flow of water to residents.
The geology influencing this supply is a fascinating transition zone. The Longdendale Valley is primarily characterized by older, harder rocks. However, the Tameside fringe taps into Triassic sandstone aquifers. The blend of these geological influences, described as an east Manchester limestone/gritstone transition, results in water that is moderately hard, registering around 12.5°Clark.
This moderate hardness means you might notice some scale buildup in kettles and on taps over time, though it’s generally less aggressive than in very hard water areas. Soap and detergent will lather reasonably well, but you might find yourself using slightly more than you would with soft water. For those concerned about appliance longevity, particularly water heaters and dishwashers, a water softener could be a worthwhile investment. Regular descaling of appliances will help maintain their efficiency and lifespan.
Geology & Source: Longdendale Valley Reservoirs; Triassic sandstone; limestone/gritstone transition blend produces moderate hardness
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