Tap Water in NP20
Newport West Water Supply Zone — Welsh Water
Tap water in Newport West 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 soft, in the lower end of the national range, with a total hardness of 150 mg/L as CaCO₃.
Mineral composition
| mg/L | |||
|---|---|---|---|
| Calcium | ~51 | ||
| Magnesium | ~6 | ||
| 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 | 150 as CaCO₃ |
| Alkalinity | awaiting data |
| pH | awaiting data |
| Conductivity | awaiting data |
| Source | Welsh Water |
| Data year | 2024 |
What this means
Kettle & appliances
Some light mineral residue may appear in kettles over time, but significant limescale buildup is unlikely. No treatment needed for most appliances.
Espresso
A good range for espresso. Enough mineral content to provide body and balance acidity without posing a real scale risk to the machine. Most specialty coffee water targets fall in or near this band.
Filter & pour-over
Excellent for filter brewing. The slight mineral content adds body and sweetness without masking acidity, giving a balanced cup across most roast levels. This is close to the SCA's recommended range for brewed coffee.
Drinking & cooking
Tastes clean with a slight mineral presence. Good all-round water for cooking; it won't interfere with delicate flavours or leave noticeable deposits.
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Data sourced from Welsh Water (2024). Looking for a specific address? Look up your full postcode for the most accurate result.