Risca Water Hardness & Quality Report (2026)
Water Hardness
~100–149 mg/L
Slightly Hardestimated · not lab-verified
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
172.1 mg/L
Est. Daily Cost
£0.28
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 Risca, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Risca | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.1 yrs | 8.5 yrs | -16% |
| Washing Machine | 10 yrs | 12 yrs | -17% |
| Water Heater | 12.5 yrs | 15 yrs | -17% |
Regional Water Comparison
How Risca compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Risca, Wales | ≈ 100–149 mg/L | 8.8° | 🟡 Slightly Hard | reservoir |
| Abercarn, Wales | ≈ 100–150 mg/L | 5.5° | 🟡 Slightly Hard | reservoir |
| Cwmbran, Wales | ≈ 100–150 mg/L | 9.2° | 🟡 Slightly Hard | reservoir |
| Newport, Wales | ≈ 150–200 mg/L | 3.2° | 🟡 Moderately Hard | reservoir |
| Pontypool, Wales | ≈ 100–150 mg/L | 6.3° | 🟡 Slightly Hard | reservoir |
National Benchmark
How Risca compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Risca | ≈ 100–149 mg/L | 🟡 Low |
| United Kingdom National Avg | 177 mg/L | 🟡 Moderate |
| Skipton Top Rated | 7.1 mg/L | 🟢 None |
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What Makes Risca's Water Unique?
Local geology and source profile
Welsh Water serves Risca, Caerphilly, Wales, drawing water from various sources across South Wales. These include surface water from rivers and reservoirs, along with groundwater supplies. While specific treatment plants and reservoir sources for Risca weren't publicly detailed, the utility manages a complex network to ensure water reaches residents.
The Risca area is situated within the South Wales Valleys, characterized by Carboniferous Coal Measures formations from the Carboniferous period. This geology primarily consists of sandstones, shales, and coal seams, typical of the South Wales coalfield. The interaction of water with these rock types influences the mineral content, contributing to the region's classification as having slightly hard water on average.
Slightly hard water means you might observe a little scale forming in appliances like kettles and hot water systems over time. While not as severe as in genuinely hard water areas, some residents opt for water softeners to extend the life of their appliances and get better lather from soaps. Welsh Water guarantees its supply meets all UK regulatory standards, but for the most precise, up-to-date details on your local water quality, contacting Welsh Water directly is the best approach.
Geology & Source: Carboniferous Coal Measures; sandstones and shales result in slightly hard water
Other Wales Water Reports
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