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This is the original version (as it was originally made).
Regulations 4, 10, 15 and 17
SCHEDULE 1Concentrations or Values
PART 1Wholesomeness
TABLE A: MICROBIOLOGICAL PARAMETERS
Prescribed concentrations or values
Parameters | Maximum concentration or value | Units of Measurement |
---|
Escherichia coli (E. coli) | 0 | Number/100ml |
Enterococci | 0 | Number/100ml |
In the case of water in bottles or containers: | | |
Escherichia coli (E.coli) | 0 | Number/250ml |
Enterococci | 0 | Number/250ml |
Pseudomonas aeruginosa | 0 | Number/250ml |
Colony count 22°C | 100 | Number/ml |
Colony count 37°C | 20 | Number/ml |
TABLE B:CHEMICAL PARAMETERS
Prescribed concentrations or values
Parameters | Maximum concentration or value | Units of Measurement |
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|
|
|
|
|
|
|
Acrylamide | 0.10 | μg/l |
Antimony | 5.0 | μg/l |
Arsenic | 10 | μg/l |
Benzene | 1.0 | μg/l |
Benzo(a)pyrene | 0.010 | μg/l |
Boron | 1.0 | mg/l |
Bromate | 10 | μg/l |
Cadmium | 5.0 | μg/l |
Chromium | 50 | μg/l |
Copper | 2.0 | mg/l |
Cyanide | 50 | μg/l |
1, 2 dichloroethane | 3.0 | μg/l |
Epichlorohydrin | 0.10 | μg/l |
Fluoride | 1.5 | mg/l |
Lead | 25 (until 25th December 2013) | μg/l |
| 10 (from 25th December 2013) | μg/l |
Mercury | 1.0 | μg/l |
Nickel | 20 | μg/l |
Nitrate | 50 | mg/l |
Nitrite | 0.5 (or 0.1 in the case of treatment works) | mg/l |
Pesticides — | | |
| 0.030 | μg/l |
| 0.030 | μg/l |
| 0.030 | μg/l |
| 0.030 | μg/l |
| 0.10 | μg/l |
| 0.50 | μg/l |
Polycyclic aromatic hydrocarbons | 0.10 | μg/l |
Selenium | 10 | μg/l |
Tetrachloroethene and Trichloroethene | 10 | μg/l |
Trihalomethanes: Total | 100 | μg/l |
Vinyl chloride | 0.50 | μg/l |
National requirements — Prescribed concentrations or values
Parameters | Maximum concentration or value | Units of Measurement |
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Aluminium | 200 | μg/l |
Colour | 20 | mg/l Pt/Co |
Iron | 200 | μg/l |
Manganese | 50 | μg/l |
Odour | Acceptable to consumers and no abnormal change | |
Sodium | 200 | mg/l |
Taste | Acceptable to consumers and no abnormal change | |
Tetrachloromethane | 3 | μg/l |
Turbidity | 4 | NTU |
PART 2Indicator Parameters
TABLE C
Prescribed concentrations, values or states
Parameters | Maximum concentration or value or state (unless otherwise stated) | Units of measurement |
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|
|
|
Ammonium | 0.50 | mg/l |
Chloride | 250 | mg/l |
Clostridium perfringens | 0 | Number/100ml |
(including spores) | | |
Coliform bacteria | 0 | Number/100ml (Number/250ml in the case of water put into bottles or containers) |
Colony counts | No abnormal change | Number/ml at 22°C |
| No abnormal change | Number/ml at 37°C |
Conductivity | 2500 | μS/cm at 20°C |
Hydrogen ion | 9.5 (maximum) | pH value |
| 6.5 (minimum) (in the case of still water put into bottles or containers the minimum is 4.5) | pH value |
Sulphate | 250 | mg/l |
Total indicative dose (for radioactivity) | 0.10 | mSv/year |
Total organic carbon (TOC) | No abnormal change | mgC/l |
Tritium | | |
(for radioactivity) | 100 | Bq/l |
Turbidity | 1 | NTU |
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