Renfrew Water Hardness & Quality Report (2026)
Water Hardness
~0–99 mg/L
Softestimated · not lab-verified
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
77.6 mg/L
Est. Daily Cost
£0.11
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 Renfrew, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Renfrew | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.2 yrs | 12 yrs | -7% |
| Water Heater | 14 yrs | 15 yrs | -7% |
Regional Water Comparison
How Renfrew compares to its nearest neighbours
| City | Hardness | Clark° | Risk | Source |
|---|---|---|---|---|
| ▶ Renfrew, Scotland | ≈ 0–99 mg/L | 3.5° | 🟢 Soft | reservoir |
| Clydebank, Scotland | ≈ 0–100 mg/L | 2.4° | 🟢 Soft | reservoir |
| Paisley, Scotland | ≈ 0–100 mg/L | 4.2° | 🟢 Soft | reservoir |
| Erskine, Scotland | ≈ 0–100 mg/L | 3.1° | 🟢 Soft | reservoir |
| Barrhead, Scotland | ≈ 0–100 mg/L | 4.5° | 🟢 Soft | reservoir |
National Benchmark
How Renfrew compares to the United Kingdom average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Renfrew | ≈ 0–99 mg/L | 🟢 None |
| United Kingdom National Avg | 177 mg/L | 🟡 Moderate |
| Skipton Top Rated | 7.1 mg/L | 🟢 None |
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What Makes Renfrew's Water Unique?
Local geology and source profile
Renfrew receives its mains drinking water from Scottish Water. While the exact sources serving the area were not specified in the available information, the water is understood to originate from Loch Katrine, which is part of the Loch Lomond Schist and Dalradian metamorphic Highland catchment. This catchment area is known for contributing to exceptionally soft water. Residents seeking the most up-to-date and specific water quality reports for Renfrew should refer to Scottish Water's official publications.
The geology contributing to Renfrew's water supply is characterized by Loch Lomond Schist and Dalradian metamorphic rocks within a Highland catchment. These ancient metamorphic terrains are known for their low mineral content. Consequently, the water flowing through and from this region is exceptionally soft, registering very low levels of dissolved minerals like calcium and magnesium, which are the primary contributors to water hardness.
Residents in Renfrew might notice that exceptionally soft water doesn't lather soap as readily as harder water, and it can sometimes have a slightly different taste. Because it contains very few minerals, it's less likely to cause scale buildup in appliances like kettles and water heaters, potentially extending their lifespan. You won't need a water softener for this supply, and you may find you use less detergent and soap. The lack of mineral content is generally considered beneficial for plumbing and appliances.
Geology & Source: Loch Lomond Schist, Dalradian metamorphic; Highland catchment produces extremely soft water
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