S.I. No. 70/1965 - Fluoridation of Water Supplies (Mayo) Regulations, 1965.

1. The Ballina piped water supply.

2. The Castlebar piped water supply.

3. The Westport piped water supply.

4. The Achill Regional piped water supply.

5. The Ballyhaunis piped water supply.

6. The Ballinrobe piped water supply.

7. The Claremorris piped water supply.

8. The Swinford piped water supply.

9. The Kiltimagh piped water supply.

Article 6.

SECOND SCHEDULE.

(1) SPECIFICATION FOR SODIUM FLUORIDE.

The substance shall contain a minimum of 98 per cent sodium fluoride (NaF) by weight, providing 44.3 per cent available fluorine.

The substance shall not contain any toxic or harmful impurities when dissolved in water.

The content of insoluble material shall not exceed 0.5 per cent.

The moisture content shall not exceed 0.5 per cent.

The substance shall have a crystalline form (20-40 mesh particle size) and shall be free from dust.

(2) SPECIFICATION FOR SODIUM SILICOFLUORIDE.

The substance shall contain a minimum of 98 per cent sodium silicofluoride (Na

2

SiF

6

) by weight, providing 59 per cent available fluorine.

The substance shall not contain any toxic or harmful impurities when dissolved in water.

The content of insoluble material shall not exceed 0.5 per cent.

The moisture content shall not exceed 0.5 per cent.

The substance shall be in the form of a powder and shall conform to the following sieve tests:—

(

a

) 100 per cent to pass through a 40 mesh sieve,

(

b

) 95 per cent to pass through a 100 mesh sieve, and

(

c

) not less than 5 per cent nor more than 35 per cent to pass through a 325 mesh sieve.

(3) SPECIFICATION FOR HYDROFLUOSILICIC ACID OF 14 PER CENT STRENGTH.

The acid as supplied shall contain 14 per cent by weight of fluosilicic acid (H

2

SiF

6

), subject to a tolerance of 0.5 per cent above or below that strength, and shall contain not more than 0.012 per cent by weight "heavy metals" expressed as lead (Pb) and no other soluble mineral or organic substance in quantities capable of a deleterious or injurious effect upon health.

GIVEN under the Official Seal of the Minister for Health this 12th day of April, One Thousand Nine Hundred and Sixty-five.

SEÁN MAC ENTEE,

Minister for Health.

EXPLANATORY NOTE.

These Regulations require the Mayo County Council to arrange for the fluoridation of the public water supplies specified in the First Schedule, in accordance with the conditions set out in articles 5, 6, 7 and 8. Under article 4, Ballina, Castlebar and Westport Urban District Councils, acting as agents for Mayo County Council, are required to perform certain acts in relation to the fluoridation of their respective water supplies.

S.I. No. 70 of 1965.

FLUORIDATION OF WATER SUPPLIES (MAYO) REGULATIONS, 1965.

The Minister for Health, having complied with subsection (4) of

Section 2

of the

Health (Fluoridation of Water Supplies) Act, 1960

(No. 46 of 1960) and having consulted with the Minister for Local Government, hereby makes the following Regulations:—