United Kingdom

2021.03.08
Place TDS
ppm		 pH

Chlorine Residual

ppm

 Hard Water
ppm

Turbidity

NTU

 Water Pressure Date
Ibis London Canning 386 7.26 0 184 1.29   Mar 10,2023
Stockport Station Manchester 77 7.01 0 71 0.95   Mar 10,2023
Motel One Manchester Piccadilly 76 6.91 0 86 1.83 2.6kg/cm2 Mar 10,2023
Heathrow Airport 384 7.22 0 229 0.9   Mar 10,2023
Leicester 292 6.97 0 182 1.73 2.6kg/cm2 Mar 10,2023
Holiday Inn Express Lincoln City Centre 398 7.37 0 137 1.55   Mar 10,2023
Holiday Inn Express Bradford City Centre 88 6.96 0 71 1.11 2.8kg/cm2 Mar 10,2023
Fairfield Industrial Estate,louth Lincolnshire 296 6.92 0.07 157 1.54 4.7kg/cm2 Mar 10,2023
Holiday Inn Stoke On Trent Newcastle 276 6.94 0 129 0.9 0.7kg/cm2 Mar 10,2023
St Albans 376 6.75 0.05 250 1.61 3.1kg/cm2 Jun 22, 2016
Farringdon 324 5.95 0.43 190 2.35   Jun 22, 2016
Stoke-on-Trent 250 7.14 0.04 180 0.82   Jun 22, 2016
AQUATIERE 289 7.2 0.04 215 1.26   Jun 22, 2016
Woking 371 6.99 0.03 210 0   Jun 22, 2016
Bicester Village 325 7.08 0.05 220 0 2.9kg/cm2 Jun 22, 2016
The White Hart Restaurant 346 6.58 0.16 175 0   Jun 22, 2016
LEEDS 191 6.84 0.04 145 1.71   Jun 22, 2016
London Heathrow Airport 371 7.03 0.08 205 1.23   Jun 22, 2016
London Heathrow Airport 303 7.04 0.02 100↑     Feb 26, 2013
Windermere 30 7.62 0.01 20↓     Feb 26, 2013
Edinburgh  41 7.12 0.02 35     Feb 26, 2013
Stratford 281 7.55 0.06 100↑     Feb 26, 2013
York 276 7.22 0.05 100↑ 0.66   Feb 26, 2013
Cambridge 301 7.57 0.02 90 1.05   Feb 26, 2013
London 332 7.8 0.01       Mar 11, 2012

 



TDS
(Total dissolved solids)

Total dissolved solid (TDS) is a measure of the combined total of organic and inorganic substances contained in a liquid. This includes anything present in the water other than the pure H20 molecules. These solids are primarily minerals, salts and organic matter that can be a general indicator of water quality. Therefore, High TDS means many substances in the water.

Unit：parts per million (ppm). 

 
pH
hydrogen ion concentration

In chemistry, pH is a measure of the acidity or basicity of an aqueous solution.

 

Chlorine Residual 

That portion of the total available chlorine residual remaining in water or wastewater at the end of a specified contact period. Chlorine residual will react chemically and biologically as hypochlorous acid (HOCl) or hypochlorite ion (OCl–). This does not include chlorine that has combined with ammonia, nitrogen, or other compounds.

1. At 30 minutes after the addition of sodium hypochlorite there should be no more than 2.0 mg/L of free chlorine residua l present (this ensures the water does not have an unpleasant taste or odor).

2. At 24 hours after the addition of sodium hypochlorite to containers that are used by families to store water there should be a minimum of 0.2 mg/L of free chlorine residual present (this ensures microbiologically clean water).

Hard Water

Hardness is caused by compounds of calcium and magnesium, and by a variety of other metals. Water is an excellent solvent and readily dissolves minerals it comes in contact with. As water moves through soil and rock, it dissolves very small amounts of minerals and holds them in solution. Calcium and magnesium dissolved in water are the two most common minerals that make water "hard."

Turbidity

Turbidity is the measure of relative clarity of a liquid. It means the cloudiness or haziness of a fluid caused by large numbers of individual particles. It is an optical characteristic of water and is an expression of the amount of light that is scattered by material in the water when a light is shined through the water sample. The higher the intensity of scattered light, the higher the turbidity. That measurement of turbidity is important test of water quality.
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