South Shields Water Hardness & Quality Report (2026)
Water Hardness
8.6°Clark12.2°fH6.8°dH
Source
mixed
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
301.7 mg/L
Est. Daily Cost
£0.28
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 South Shields, your appliances are currently losing 16% efficiency due to mineral buildup.
| Appliance | In South Shields | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.6 yrs | 8.5 yrs | -34% |
| Washing Machine | 9.1 yrs | 12 yrs | -24% |
| Water Heater | 10.7 yrs | 15 yrs | -29% |
Regional Water Comparison
How South Shields compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ South Shields, North East | 122 mg/L | 8.6° | 🟠 Hard | mixed |
| Tynemouth, North East | 151 mg/L | 10.6° | 🟠 Hard | mixed |
| North Shields, North East | 196 mg/L | 13.8° | 🔴 Very Hard | mixed |
| Whitley Bay, North East | 82 mg/L | 5.8° | 🟡 Moderately Hard | mixed |
| Jarrow, North East | 170 mg/L | 11.9° | 🟠 Hard | mixed |
National Benchmark
How South Shields compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ South Shields | 122 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 South Shields's Water Unique?
Local geology and source profile
South Shields, the coastal town in South Tyneside at the mouth of the River Tyne, is supplied by Northumbrian Water from the River Tyne catchment system and the Kielder Transfer Scheme. The Tyne is fed primarily by two upland tributaries — the North Tyne (sourced from Kielder Water, the UK's largest man-made reservoir, in Northumberland) and the South Tyne (rising on the North Pennines near Alston). Both headwater systems drain over Carboniferous Millstone Grit and Pennine moorland, with the North Tyne valley also including some Carboniferous Limestone country. Water is treated at Horsley Water Treatment Works in Northumberland before distribution through the Tyne Valley and Tyneside network to South Shields and South Tyneside. The town's coastal position on the Magnesian Limestone escarpment of the Durham coast adds a minor local calcium influence.
South Shields' hardness of 122 mg/L (8.6°Clark) is somewhat above the very soft Kielder baseline (30–40 mg/L), reflecting the blended Tyne supply and a modest contribution from the Permian Magnesian Limestone of the south Tyne estuary coast. The Kielder-fed North Tyne contributes very soft water, while the South Tyne drains some limestone country in the North Pennines, adding a moderate calcium increment. The Magnesian Limestone at the South Shields coast — part of the Durham Heritage Coast formation — contributes a small additional mineral influence. The Drinking Water Inspectorate (DWI) classifies the supply as moderately soft.
Limescale is a moderate concern in South Shields. At 122 mg/L, limescale forms gradually — kettles need descaling every one to two months and deposits on taps and showerheads accumulate slowly. Combi-boiler heat exchangers face modest limescale pressure; annual servicing is sensible. Washing-up liquid lathers reasonably well. The North East supply gives South Shields relatively easy limescale management — a monthly Calgon tablet in the washing machine and a periodic kettle descale is adequate maintenance for most households.
Geology & Source: Supplied by Northumbrian Water from the Kielder Water Transfer Scheme and River Tyne catchment — South Shields' Tyne estuary position draws on Northumbrian Water's Tyne valley and Kielder upland supply, producing moderately soft water at 122 mg/L (8.6°Clark) with a modest Magnesian Limestone coastal influence.