1. Water satisfies the requirements of this Schedule if–
(a)the water does not contain–
(i)any micro-organism (other than a parameter) or parasite; or
(ii)any property, element or substance (other than a parameter),
at a concentration or value which would constitute a potential danger to human health;
(b)the water does not contain any substance (whether or not a parameter) at a concentration or value which, in conjunction with any other property, element, substance or organism it contains (whether or not a parameter), would constitute a potential danger to human health;
(c)the water does not contain concentrations or values of any of the parameters listed in Tables A to D in Part 2 of this Schedule in excess of the prescribed concentrations or values; and
(d)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.