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GUILDFORD DISTRICT WEST · Guildford
Thames Water
Water safety
Water safety| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Free Chlorinemg CL2/l | Not reported | 0.2 – 1 | — |
|---|
| Total Chlorinemg CL2/l | 0.56 | No limit | 0.11 |
|---|
General
General| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Hardnessmg CaCO3/l | 225 | 80 – 459 | 225 |
|---|
| pH | 7.28 | 6.5 – 9.5 | 7.28 |
|---|
| TurbidityNTU | 0.09 | ≤ 4 | 0.009 |
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| ColorColor Units | 1.8 | ≤ 15 | 1.8 |
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| ConductivityμS / cm | 514 | ≤ 2,500 | 514 |
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| TDSmg/l | 329estimated | 0 – 1,199 | 329 |
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| OdorTON | 0 | ≤ 3 | 0 |
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| Alkalinitymg CaCO3/l | 171 | No limit | 171 |
|---|
Pathogens
Pathogens| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| ClostridiumUFC/100ml | 0 | ≤ 0 | 0 |
|---|
| eColiUFC/100ml | 0 | ≤ 0 | 0 |
|---|
| BacteriasNMP/100ml | 0 | ≤ 0 | 0 |
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| EnterococcusUFC/100ml | 0 | ≤ 0 | 0 |
|---|
Chemical parameters
Chemical parameters| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Cyanide totalμg CN/l | 1.4 | ≤ 50 | 0.07 |
|---|
| Fluoridemg F/l | 0.14 | ≤ 1.5 | 0.042 |
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| Mercuryμg Hg/l | 0.07 | ≤ 1 | 0.007 |
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| Nitritesmg NO2/l | 0.02 | ≤ 0.5 | 0.008 |
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| Nitratesmg NO3/l | 24.7 | ≤ 50 | 7.41 |
|---|
Minerals
Minerals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Magnesiummg/l | 3 | No limit | 3 |
|---|
| Chloridemg/l | 39 | ≤ 250 | 39 |
|---|
Metals
Metals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Aluminiumμg/l | 8.3 | ≤ 200 | 8.3 |
|---|
| Antimonyμg/l | 0.3 | ≤ 5 | 0.3 |
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| Arsenicμg/l | 0.7 | ≤ 10 | 0.35 |
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| Cadmiumμg/l | 0.4 | ≤ 5 | 0.4 |
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| Chromiumμg/l | 2.5 | ≤ 50 | 2.5 |
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| Copperμg/l | 230 | ≤ 2,000 | 11.5 |
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| Ironμg/l | 8 | ≤ 200 | 8 |
|---|
| Manganeseμg/l | 1.2 | ≤ 50 | 1.2 |
|---|
| Leadμg/l | 2.3 | ≤ 10 | 0.12 |
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| Nickelμg/l | 1 | ≤ 20 | 1 |
|---|
| Seleniumμg/l | 1 | ≤ 10 | 1 |
|---|
| Sodiummg/l | 20 | ≤ 200 | 20 |
|---|
Chlorine by-products
Chlorine by-products| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total Trichloroethyleneμg/l | 0 | ≤ 10 | 0 |
|---|
| Total Trihalomethanesμg/l | 20 | ≤ 100 | 1 |
|---|
Pesticides
Pesticides| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total pesticidesug/L | 0.004 | ≤ 0.5 | 0.004 |
|---|
Herbicides
Herbicides| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| D 2 4ug/L | 0.017 | ≤ 70 | 0.017 |
|---|
| Atrazineug/L | 0.005 | ≤ 3 | 0.005 |
|---|
Perfluorinated chemicals
Perfluorinated chemicals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total PFASug/L | Not reported | ≤ 0.1 | — |
|---|
Other
Other| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Ammoniamg/l | 0.03 | No limit | 0.009 |
|---|
| Sulfatemg/l | 34 | No limit | 34 |
|---|
Data collected from the water company for your area. Quality ranges are based on WHO guidelines and the UK drinking water regulations.
1036 of 1037 tests within UK limits
