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Stornoway Western Isles · Na h-Eileanan Siar
Scottish Water
Water safety
Water safety| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Free Chlorinemg CL2/l | 0.08 ● (Near the limit) | 0.2 – 1 | 0.002 ▲ |
|---|
| Total Chlorinemg CL2/l | 1.13 | No limit | 0.23 |
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General
General| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Hardnessmg CaCO3/l | 9.74 ● (Near the limit) | 80 – 459 | 9.74 ● |
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| pH | 8.26 | 6.5 – 9.5 | 8.26 |
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| TurbidityNTU | 0.3 | ≤ 4 | 0.03 |
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| ColorColor Units | 2.46 | ≤ 15 | 2.46 |
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| ConductivityμS / cm | 176.9 | ≤ 2,500 | 176.9 |
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| TDSmg/l | 113.2estimated | 0 – 1,199 | 113.2 |
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| OdorTON | 0 | ≤ 3 | 0 |
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Pathogens
Pathogens| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| ClostridiumUFC/100ml | 0 | ≤ 0 | 0 |
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| eColiUFC/100ml | 0 | ≤ 0 | 0 |
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| BacteriasNMP/100ml | 0 | ≤ 0 | 0 |
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| EnterococcusUFC/100ml | 0 | ≤ 0 | 0 |
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Chemical parameters
Chemical parameters| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Cyanide totalμg CN/l | 3.15 | ≤ 50 | 0.16 |
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| Fluoridemg F/l | 0.12 | ≤ 1.5 | 0.036 |
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| Mercuryμg Hg/l | 0.02 | ≤ 1 | 0.002 |
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| Nitritesmg NO2/l | 0.02 | ≤ 0.5 | 0.008 |
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| Nitratesmg NO3/l | 0.63 | ≤ 50 | 0.19 |
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Minerals
Minerals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Magnesiummg/l | 1.61 | No limit | 1.61 |
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| Calciummg/l | 1.25 | No limit | 1.25 |
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| Chloridemg/l | 29.5 | ≤ 250 | 29.5 |
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Metals
Metals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Aluminiumμg/l | 17.2 | ≤ 200 | 17.2 |
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| Antimonyμg/l | 0.4 | ≤ 5 | 0.4 |
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| Arsenicμg/l | 0.2 | ≤ 10 | 0.1 |
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| Cadmiumμg/l | 0.02 | ≤ 5 | 0.02 |
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| Chromiumμg/l | 0.6 | ≤ 50 | 0.6 |
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| Copperμg/l | 10 | ≤ 2,000 | 0.5 |
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| Ironμg/l | 15.2 | ≤ 200 | 15.2 |
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| Manganeseμg/l | 2.31 | ≤ 50 | 2.31 |
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| Leadμg/l | 0.54 | ≤ 10 | 0.027 |
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| Nickelμg/l | 0.8 | ≤ 20 | 0.8 |
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| Seleniumμg/l | 1.2 | ≤ 10 | 1.2 |
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| Sodiummg/l | 34.6 | ≤ 200 | 34.6 |
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Chlorine by-products
Chlorine by-products| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total Trichloroethyleneμg/l | 0.52 | ≤ 10 | 0.026 |
|---|
| Total Trihalomethanesμg/l | 37.9 | ≤ 100 | 1.89 |
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Haloacetic acids
Haloacetic acids| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total haloacetic acidsμg/l | 22.3 | ≤ 60 | 1.12 |
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Perfluorinated chemicals
Perfluorinated chemicals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total PFASug/L | Not reported | ≤ 0.1 | — |
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| PFAS 4ng/l | Not reported | No limit | — |
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| PFAS 21ng/l | Not reported | No limit | — |
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Other
Other| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Ammoniamg/l | 0.29 | No limit | 0.087 |
|---|
| Sulfatemg/l | 21.2 | No limit | 21.2 |
|---|
| Uraniumug/L | 0.04 | No limit | 0.04 |
|---|
Data collected from the water company for your area. Quality ranges are based on WHO guidelines and the UK drinking water regulations.
426 of 426 tests within UK limits
