1. Water satisfies the requirements of this Schedule if–E+W
(a)the water does not contain any property, element, organism, or substance–
(i)(other than a parameter) at a concentration or value which would be injurious to health;
(ii)(whether or not a parameter) at a concentration or value which in conjunction with any other property, element, organism or substance it contains (whether or not a parameter) would be injurious to health;
(b)the water does not contain–
(i)concentrations or values of any of the parameters listed in Tables A to D in Part II of this Schedule in excess of the prescribed concentrations or values;
(ii)concentrations of trihalomethanes (being the aggregate of the concentrations of trichloromethane, dichlorobromomethane, dibromochloromethane and tribromomethane) in excess of 100μg/l; and
(c)in the case of water prepared from water which has been softened or desalinated, its hardness is not below a minimum concentration of 60 mg Ca/l and its alkalinity is not below a minimum concentration of 30 mg HCO3/l.