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“Regulation 17
Regulations 2(1), 11, 12 and 16
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 II of this Schedule in excess of the prescribed concentrations or values; and
(c)in the case of water prepared from water which has been softened or disalinated, its hardness is not below a minimum concentration of 60mg Ca/l.
2. The concentrations or values of the parameters listed in Tables A to D in Part II of this Schedule shall be read in conjunction with the notes thereto.
Column 1 | Column 2 | Column 3 | Column 4 |
---|---|---|---|
Item | Parameters | Units of Measurement | Concentration or Value (maximum unless otherwise stated) |
NOTES
| |||
1. | Colour | mg/1 Pt/Co scale | 20 |
2. | Turbidity | NTU | 4 |
3. | Odour | Dilution number | 3 at 25°C |
4. | Taste | Dilution number | 3 at 25°C |
5. | Sulphate | mg So4/l | 250 |
6. | Sodium | mg Na/l | 200 |
7. | Nitrate | mg/N03/l | 50 (note 1) |
8. | Nitrite | mg NO2/l | 0.5 (note 1) |
9. | Aluminium | μg Al/l | 200 |
10. | Copper | mg Cu/l | 2 |
11. | Fluoride | mg F/l | 1.5 |
12. | Hydrogen ion concentration | pH units | 6.5 (minimum) 9.5 (maximum) |
13. | Tritium (for radioactivity) | Bq/l | 100 |
14. | Total indicative dose | mSv/year | 0.10 (note 2) |
15. | Manganese | μg Mn/l | 50 |
Column 1 | Column 2 | Column 3 | Column 4 |
---|---|---|---|
Item | Parameters | Units of Measurement | Maximum Concentration |
NOTES
| |||
1. | Arsenic | μg As/l | 10 |
2. | Cadmium | μg Cd/l | 5 |
3. | Cyanide | μg Cn/l | 50 |
4. | Chromium | μg Cr/l | 50 |
5. | Mercury | μg Hg/l | 1 |
6. | Nickel | μg Ni/l | 20 |
7. | Selenium | μg Se/l | 10 |
8. | Antimony | μg Sb/l | 5 |
9. | Lead | μg Pb/l | 10 |
10. | Pesticides and related products: | ||
(a)individual substances | μg/l | 0.10 (notes 1 and 2) | |
(b)total substances | μg/l | 0.50 (notes 1 and 3) | |
11. | Polycyclic aromatic hydrocarbons | μg/l | 0.1 sum of concentrations of specified compounds (note 4) |
12. | Bromate | μg Br03/l | 10 |
Column 1 | Column 2 | Column 3 | Column 4 |
---|---|---|---|
Item | Parameters | Units of Measurement | Maximum Concentration |
NOTES
| |||
1. | Escherichia coli (E.coli) | number/250 ml | 0/250 ml |
2. | Enterococci | number/250 ml | 0/250 ml |
3. | Colony count 22°C | number/ml | 100 ml (notes 1 and 2) |
4. | Colony count 37°C | number/ml | 20 ml (notes 1 and 3) |
5. | Pseudomonas aeruginosa | number/250 ml | 0/250 ml |
Column 1 | Column 2 | Column 3 | Column 4 |
---|---|---|---|
Item | Parameters | Units of Measurement | Maximum Concentration |
NOTES
| |||
1. | Boron | mg B/l | 1.0 |
2. | Benzo (a) pyrene | μg/l | 0.010 |
3. | Tetrachloroethene and Trichloroethene | μg/l | 10 (note 1) |
4. | Tetrachloromethane | μg/l | 3 |
5. | Benzene | μg/l | 1.0 |
6. | 1,2 dichloroethane | μg/l | 3.0 |
7. | Trichloromethane, Dichlorobromomethane, Dibromochloromethane and Tribromomethane | μg/l | 100 (note 1) |
8. | Epichlorohydrin | μg/l | 0.10 (note 2) |
9. | Vinyl chloride | μg/l | 0.50 (note 2) |
10. | Acrylamide | μg/l | 0.10 (note 2) |
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