Bolsover Water Hardness & Quality Report (2026)
Water Hardness
9.9°Clark14.1°fH7.9°dH
Source
mixed
pH Level
7.7
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
342.1 mg/L
Est. Daily Cost
£0.32
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 Bolsover, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Bolsover | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.9 yrs | 8.5 yrs | -42% |
| Washing Machine | 8.4 yrs | 12 yrs | -30% |
| Water Heater | 10 yrs | 15 yrs | -33% |
Regional Water Comparison
How Bolsover compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Bolsover, East Midlands | 141 mg/L | 9.9° | 🟠 Hard | mixed |
| Staveley, East Midlands | 128 mg/L | 9° | 🟠 Hard | mixed |
| Shirebrook, East Midlands | 186 mg/L | 13° | 🔴 Very Hard | mixed |
| Sutton in Ashfield, East Midlands | 106.5 mg/L | 7.5° | 🟡 Moderately Hard | mixed |
| Beighton, Yorkshire and the Humber | 178 mg/L | 12.5° | 🟠 Hard | mixed |
National Benchmark
How Bolsover compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Bolsover | 141 mg/L | 🟠 Moderate |
| United Kingdom National Avg | 183 mg/L | 🔴 High |
| Livingston Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Bolsover's Water Unique?
Local geology and source profile
Severn Trent Water supplies Bolsover, the north-east Derbyshire market town — a community with remarkable industrial, mining, and architectural heritage, dominated by the magnificent restored Bolsover Castle on its limestone promontory overlooking the Doe Lea Valley — from Derwent Valley Reservoirs in the Peak District blended with Permian Magnesian Limestone groundwater in the north-east Derbyshire distribution zone, treated at Bamford Water Treatment Works in the Hope Valley. At 141 mg/L (9.9°Clark), Bolsover's water is moderately hard — reflecting a moderate Magnesian Limestone groundwater component mixed into the soft Derwent Valley reservoir baseline in the north Derbyshire distribution supply blend.
Bolsover sits on the Permian Magnesian Limestone (Zechstein) ridge east of the Carboniferous Pennine coalfield — the same geological sequence that gave its name to the Bolsover district limestone belt. Severn Trent Water blends soft Derwent Valley reservoir supply with a proportion of Magnesian Limestone groundwater to supply the north Derbyshire and Nottinghamshire coalfield fringe, producing 141 mg/L with TDS 342.1 mg/L at Bolsover — moderately hard water consistent with the Magnesian Limestone belt communities from Shirebrook through Bolsover to Clowne in the same Severn Trent north Derbyshire distribution zone.
At 141 mg/L, limescale is a consistent household concern in Bolsover. Kettles benefit from descaling every four to six weeks. The combi-boiler should be fitted with a scale inhibitor and serviced annually. Washing-up liquid requires more product per wash. Taps and shower heads develop moderate white limescale deposits within two to three weeks; a monthly wipe with white vinegar or a proprietary descaling product keeps fittings in good condition. The moderately hard Magnesian Limestone supply at Bolsover reflects the same limestone geology that raised the great castle above the valley — calcium-rich water drawn from the same carbonate rock that defines the north Derbyshire plateau.
Geology & Source: Supplied by Severn Trent Water from Derwent Valley Reservoirs blended with Magnesian Limestone groundwater in the north-east Derbyshire supply zone — treated at Bamford Water Treatment Works — produces moderately hard water at 141 mg/L (9.9°Clark).