Tap Water in SA34
Pendine Water Supply Zone — Welsh Water
Tap water in Pendine Water Supply Zone, supplied by Welsh Water, has the character of a blended surface and groundwater supply, with no dominant mineral signature. It's moderately hard, in the upper half of the national range, with a total hardness of 300 mg/L as CaCO₃.
Mineral composition
| mg/L | |||
|---|---|---|---|
| Calcium | ~102 | ||
| Magnesium | ~11 | ||
| Sodium | awaiting data | ||
| Sulfate | awaiting data | ||
| Chloride | awaiting data | ||
| Bicarbonate | awaiting data | ||
| ~ Estimated from hardness and ion balance — not directly measured by the water company. | |||
Additional info
| Hardness | 300 as CaCO₃ |
| Alkalinity | awaiting data |
| pH | awaiting data |
| Conductivity | awaiting data |
| Source | Welsh Water |
| Data year | 2024 |
What this means
Kettle & appliances
Limescale buildup is noticeable and ongoing. Kettles will develop visible deposits within weeks, and heating elements in boilers and washing machines will need periodic attention. A water softener or scale inhibitor is worth considering.
Espresso
This water will scale espresso machines meaningfully. Flavour-wise, the high mineral content tends to flatten acidity and produce a heavier, less nuanced shot with lighter roasts. Darker roasts and milk-based drinks fare better: the body and density that hard water produces can carry well through milk. Regular descaling is essential, and filtration or blending with softer water is worth considering.
Filter & pour-over
The effect is more noticeable here than in espresso, because the higher water-to-coffee ratio amplifies the mineral influence. Lighter roasts will taste muted and uniform; origin character gets buried. Darker roasts hold up better, but the cup will lack the clarity that filter brewing is best at producing.
Drinking & cooking
The mineral taste is perceptible. Some people prefer it; others find it chalky. Hard water can affect how well soap and detergent lather, and it leaves visible residue on glass and stainless steel.
Nearby areas
SA13
Port Talbot (Felindre / Cray Water Supply Zone
Welsh Water
SA1
Swansea / Morriston (Bryngwyn / Felindre Water Supply Zone
Welsh Water
SA2
Swansea / Morriston (Bryngwyn / Felindre Water Supply Zone
Welsh Water
SA5
Swansea / Morriston (Bryngwyn / Felindre Water Supply Zone
Welsh Water
SA7
Swansea / Morriston (Bryngwyn / Felindre Water Supply Zone
Welsh Water
SA3
Sketty / Gower (Bryngwyn / Felindre Water Supply Zone
Welsh Water
Data sourced from Welsh Water (2024). Looking for a specific address? Look up your full postcode for the most accurate result.