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Potters Bar West · Hertsmere
Affinity Water
Water safety
Water safety| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Free Chlorinemg CL2/l | Not reported | 0.2 – 1 | — |
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| Total Chlorinemg CL2/l | 0.26 | No limit | 0.052 |
|---|
General
General| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| TemperatureC | 13.7 | No limit | 13.7 |
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| Hardnessmg CaCO3/l | 363 | 80 – 459 | 363 |
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| pH | 7 | 6.5 – 9.5 | 7 |
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| TurbidityNTU | 0.1 | ≤ 4 | 0.01 |
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| ColorColor Units | 2 | ≤ 15 | 2 |
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| ConductivityμS / cm | 691 | ≤ 2,500 | 691 |
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| TDSmg/l | 442.2estimated | 0 – 1,199 | 442.2 |
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| OdorTON | 0 | ≤ 3 | 0 |
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| Alkalinitymg CaCO3/l | 274.7 | No limit | 274.7 |
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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 | 6.5 | ≤ 50 | 0.33 |
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| Fluoridemg F/l | 0.14 | ≤ 1.5 | 0.041 |
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| Mercuryμg Hg/l | 0.02 | ≤ 1 | 0.002 |
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| Nitritesmg NO2/l | 0.01 | ≤ 0.5 | 0.004 |
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| Nitratesmg NO3/l | 27.3 | ≤ 50 | 8.19 |
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Minerals
Minerals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Calciummg/l | 145 | No limit | 145 |
|---|
| Chloridemg/l | 51 | ≤ 250 | 51 |
|---|
Metals
Metals| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Aluminiumμg/l | 4.6 | ≤ 200 | 4.6 |
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| Antimonyμg/l | 0.14 | ≤ 5 | 0.14 |
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| Arsenicμg/l | 0.3 | ≤ 10 | 0.15 |
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| Cadmiumμg/l | 0.05 | ≤ 5 | 0.05 |
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| Chromiumμg/l | 0.4 | ≤ 50 | 0.4 |
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| Copperμg/l | 12 | ≤ 2,000 | 0.6 |
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| Ironμg/l | 9 | ≤ 200 | 9 |
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| Manganeseμg/l | 0.4 | ≤ 50 | 0.4 |
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| Leadμg/l | 0.72 | ≤ 10 | 0.036 |
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| Nickelμg/l | 3.3 | ≤ 20 | 3.3 |
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| Seleniumμg/l | 0.6 | ≤ 10 | 0.6 |
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| Sodiummg/l | 28.5 | ≤ 200 | 28.5 |
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Chlorine by-products
Chlorine by-products| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total Trichloroethyleneμg/l | 0 | ≤ 10 | 0 |
|---|
| Total Trihalomethanesμg/l | 16.3 | ≤ 100 | 0.81 |
|---|
Pesticides
Pesticides| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Total pesticidesug/L | 0.044 | ≤ 0.5 | 0.044 |
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Herbicides
Herbicides| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| D 2 4ug/L | 0.008 | ≤ 70 | 0.008 |
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| Atrazineug/L | 0.011 | ≤ 3 | 0.011 |
|---|
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 | — |
|---|
| PFAS 21ng/l | Not reported | No limit | — |
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Other
Other| Parameter | Unfiltered tap water | Allowed range | Filtered |
|---|
| Ammoniamg/l | 0.06 | No limit | 0.018 |
|---|
| Sulfatemg/l | 65 | No limit | 65 |
|---|
Data collected from the water company for your area. Quality ranges are based on WHO guidelines and the UK drinking water regulations.
582 of 582 tests within UK limits
