Regulation 20 Sampling—new and stand-by sources
This regulation applies as respects—
any source which has not been used for the supply of water by a water authority at any time since 15th July 1985; and
any source which has been so used but not so used for a period of six months preceding the date on which the water authority proposes to supply water from it.
A water authority shall—
before it supplies water from a source mentioned in paragraph (1)(a); and
as soon as is reasonably practicable after it has begun to supply water from a source mentioned in paragraph (1)(b),
take in accordance with paragraph (3) such samples of that water as will enable it to establish—
whether water can be supplied from that source without contravening section 76A(1) of the Act; and
the treatment necessary to ensure that section 76A(1) is complied with in relation to the supply of that water.
Samples shall be taken—
in the case of a source mentioned in paragraph (1)(a), in respect of —
each of the parameters listed in Schedule 1; and
any other element, organism or substance which, in the opinion of the authority, may cause the supply to contravene section 76A(1); or
in the case of a source mentioned in paragraph (1)(b), in respect of —
the parameters listed in Table C;
any parameter by reference to which an assessment may be made of the balance of ions within the water; and
any other parameter whose concentration or value may, in the opinion of the water authority, have altered since the last occasion on which water from that source was analysed.