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Regulations 2 and 4
SCHEDULE 1PRESCRIBED CONCENTRATIONS AND VALUES
Table A
Microbiological Parameters
Part I: Directive requirements |
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Item | Parameters | Concentration or Value (maximum) | Units of Measurement | Point of compliance |
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Note: |
1 | Enterococci | 0 | number/100 ml | Consumers' taps |
2 | Escherichia coli (E coli) | 0 | number/100 ml | Consumers' taps |
Part II: National requirements |
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Item | Parameters | Concentration or Value (maximum) | Units of Measurement | Point of compliance |
1 | Coliform bacteria | 0 | number/100 ml | Service reservoirs and water treatment works |
2 | Escherichia coli (E coli) | 0 | number/100 ml | Service reservoirs and water treatment works |
Table B
Chemical Parameters
Part I: National requirements |
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Item | Parameters | Concentration or Value (maximum) | Units of Measurement | Point of compliance |
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Notes: |
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1 | Acrylamide | 0.10 | μg/l | |
2 | Antimony | 5.0 | μgSb/l | Consumers' taps |
3 | Arsenic | 10 | μgAs/l | Consumers' taps |
4 | Benzene | 1.0 | μg/l | Consumers' taps |
5 | Benzo(a)pyrene | 0.010 | μg/l | Consumers' taps |
6 | Boron | 1.0 | mgB/l | Consumers' taps |
7 | Bromate | 10 | μBrO3/l | Consumers' taps |
8 | Cadmium | 5.0 | μgCd/l | Consumers' taps |
9 | Chromium | 50 | μgCr/l | Consumers' taps |
10 | Copper | 2.0 | mgCu/l | Consumers' taps |
11 | Cyanide | 50 | μgCN/l | Consumers' taps |
12 | 1, 2 dichloroethane | 3.0 | μg/l | Consumers' taps |
13 | Epichlorohydrin | 0.10 | μg/l | |
14 | Fluoride | 1.5 | mgF/l | Consumers' taps |
15 | Lead | (a)25, from 25th December 2003 until immediately before 25th December 2013
| μgPb/l | Consumers' taps |
(b)10, on and after 25th December 2013
| μgPb/l | Consumers' taps |
16 | Mercury | 1.0 | μgHg/l | Consumers' taps |
17 | Nickel | 20 | μgNi/l | Consumers' taps |
18 | Nitrate | 50 | mgNO3/l | Consumers' taps |
19 | Nitrite | 0.50 | mgNO2/l | Consumers' taps |
0.10 | | Treatment Works |
20 | Pesticides | | | |
Aldrin) | 0.030 | μg/l | Consumer’s taps |
Dieldrin) |
Heptachlor) |
Heptachlor |
epoxide) |
other pesticides | 0.10 | μg/l | Consumers' taps |
21 | Pesticides: Total | 0.50 | μg/l | Consumers' taps |
22 | Polycyclic aromatic hydrocarbons | 0.10 | μg/l | Consumers' taps |
23 | Selenium | 10 | μgSe/l | Consumers' taps |
24 | Tetrachloroethene and Trichloroethene | 10 | μg/l | Consumers' taps |
25 | Trihalomethanes: Total | 100 | μg/l | Consumers' taps |
26 | Vinyl chloride | 0.50 | μg/l | |
Part II: National requirements |
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Item | Parameters | Concentration or Value (maximum unless otherwise stated) | Units of Measurement | Point of compliance |
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1 | Aluminium | 200 | μgAl/l | Consumers' taps |
2 | Colour | 20 | mg/l Pt/Co | Consumers' taps |
3 | Iron | 200 | μgFe/l | Consumers' taps |
4 | Manganese | 50 | μgMn/l | Consumers' taps |
5 | Odour | Acceptable to consumers and no abnormal change | ... ... ... ... | Consumers' taps |
6 | Sodium | 200 | mgNa/l | Consumers' taps |
7 | Taste | Acceptable to consumers and no abnormal change | ... ... ... ... | Consumers' taps |
8 | Tetrachlorome-thane | 3 | μg/l | Consumers' taps |
9 | Turbidity | 4 | NTU | Consumers' taps |
Regulations 2 and 4
SCHEDULE 2INDICATOR PARAMETERS
Item | Parameters | Specification Concentration or Value (maximum unless otherwise stated) or State | Units of Measurement | Point of compliance |
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Notes: |
|
|
|
1 | Ammonium | 0.50 | mgNH4/l | Consumers' taps |
2 | Chloride | 250 | mgCl/l | Supply point |
3 | Clostridium perfringens (including spores) | 0 | Number/100 ml | Supply point |
4 | Coliform bacteria | 0 | Number/100 ml | Consumers' taps |
5 | Colony counts | No abnormal change | Number/1 ml at 22°C | Consumers' taps, service |
Number/1 ml at 37°C | Reservoirs and treatment works |
6 | Conductivity | 2500 | μS/cm at 20°C | Supply point |
7 | Hydrogen ion | 9.5 | pHvalue | Consumers' taps |
6.5 (minimum) | pH value | |
8 | Sulphate | 250 | mgSO4/l | Supply point |
9 | Total indicative dose (for radioactivity) | 0.10 | mSv/year | Supply point |
10 | Total organic carbon (TOC) | No abnormal change | mgC/l | Supply point |
11 | Tritium (for radioactivity) | 100 | Bq/l | Supply point |
12 | Turbidity | 1 | NTU | Treatment works |
SCHEDULE 3MONITORING
PART IV
Table 1Parameters and Circumstances for Check Monitoring
(1) | (2) | (3) |
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Item | Parameter | Circumstances |
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1 | Aluminium | When used as flocculant or where the water originates from, or is influenced by, surface waters |
2 | Ammonium | |
3 | Clostridium perfringens (including spores) | Where the water originates from, or is influenced by, surface waters |
4 | Coliform bacteria | |
5 | Colony counts | |
6 | Colour | |
7 | Conductivity | |
8 | Escherichia coli (E coli) | |
9 | Hydrogen ion | |
10 | Iron | When used as flocculant or where the water originates from, or is influenced by, surface waters |
11 | Manganese | Where the water originates from, or is influenced by, surface waters |
12 | Nitrate | When chloramination is practised |
13 | Nitrite | When chloramination is practised |
14 | Odour | |
15 | Taste | |
16 | Turbidity | |
Regulation 9
Table 2Annual Sampling Frequencies: Water Supply Zones
Note: This table sets out the annual sampling frequencies for all the substances and parameters in column 1. These are determined for each water supply zone according to its estimated population (column 2). The number of samples is either the standard number in column 4 or the reduced number in column 3 (if one is given). Regulation 9 provides for the circumstances in which the reduced number of samples may be taken.
(1) | (2) | (3) | (4) |
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Substances and parameters subject to check monitoring | Estimated population of water supply zone | Reduced | Standard |
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Subject to check monitoring | | | |
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E coli | <100 | | 4 |
Coliform bacteria | ≥100 | | 12 per 5,000 population |
Residual disinfectant | | | |
Aluminium | <100
100—4,999
5,000—9,999
10,000—29,999
30,000—49,999
50,000—79,999
80,000—100,000
| | |
Ammonium |
Clostridium perfringens (including spores) |
Colony counts |
Colour |
Conductivity |
Hydrogen ion |
Iron |
Manganese |
Nitrate |
Nitrite |
Odour |
Taste |
Turbidity |
Subject to audit monitoring |
Aluminium | <100
100—4,999
5,000—100,000
| | |
Antimony |
Arsenic |
Benzene |
Benzo(a)pyrene |
Boron |
Bromate |
Cadmium |
Chromium |
Clostridium perfringens (including spores) |
Copper |
Cyanide |
1,2 dichloroethane |
Enterococci |
Fluoride |
Iron |
Lead |
Manganese |
Mercury |
Nickel |
Nitrate |
Nitrite |
Pesticides and related products |
Polycyclic aromatic hydrocarbons |
Selenium |
Sodium |
Trichloroethene /Tetrachloroethene |
Tetrachloromethane |
Trihalomethanes |
Chloride |
Sulphate |
Total organic carbon |
Tritium |
Gross alpha |
Gross beta |
Regulation 9
Table 3Annual Sampling Frequencies: Treatment Works or Supply Points
Note 1: Sampling is at treatment works for the substances and parameters shown in column (1) of the Table as items (1) to (6) and at supply points for the other substances and parameters, except nitrate subject to footnotes (ii) and (ii)(a) to the Table below.
Note 2: This table sets out the annual sampling frequencies for all the substances and parameters in column 2 at treatment works or supply points. The frequencies are determined according to the volume of water supplied at each treatment works or supply point (column 3). The number of samples is either the standard number in column 5 or the reduced number in column 4 (if one is given). Regulation 9 provides for the circumstances in which the reduced number of samples may be taken.
(1) | (2) | (3) | (4) | (5) |
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Item | Substances and parameters | Volume of water supplied m3/d | Reduced | Standard |
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1. | E Coli | <20
20—1,999
2,000—5,999
6,000—11,999
≥12,000
| | |
2. | Calliform bacteria |
3. | Colony counts |
4. | Nitrite |
5. | Residual disinfectant |
6. | Turbidity |
Subject to check monitoring |
7. | Clostridium perfringens | <20
20—999
1,000—1,999
2,000—5,999
6,000—9,999
10,000—15,999
16,000—32,999
33,000—49,999
50,000—67,999
68,000—84,999
85,000—101,999
102,000—119,999
120,000—241,999
242,000—484,999
485,000—728,999
| —
2
6
12
18
26
52
78
104
130
156
183
365
730
1,095
| 2
4
12
24
36
52
104
156
208
260
312
365
730
1,460
2,190
|
8. | Conductivity |
Subject to audit monitoring |
9. | Benzene | <20
20—999
1,000—49,999
50,000—89,999
90,000—299,999
300,000—649,000
≥650,000
| | |
10. | Boron |
11. | Bromate |
11A. | Clostridium perfringens (including spores) |
12. | Cyanide |
13. | 1,2 dichloroethane |
14. | Fluoride |
15. | Mercury |
16. | Nitrite |
17. | Pesticides and Related products |
18. | Trichloroethene |
Tetrachloroethene |
19. | Tetrachloromethane |
20. | Chloride |
21. | Sulphate |
22. | Total organic carbon |
23. | Tritium |
24. | Gross alpha |
25. | Gross beta |
Regulation 16
SCHEDULE 4ANALYTICAL METHODOLOGY
Regulation 16
Table A1Parameters for which, Subject to Regulation 16(7), Methods of Analysis are Prescribed
(1) | (2) |
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Parameter | Method |
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Clostridium perfringens (including spores) | Membrane filtration followed by anaerobic incubation of the membrane on m-CP agar* at 44 ± 1°C for 21 ± 3 hours. Count opaque yellow colonies that turn pink or red after exposure to ammonium hydroxide vapours for 20 to 30 seconds. |
Coliform bacteria | ISO 9308-1 |
Colony count 22°C-enumeration of culturable microorganisms | prEN ISO 6222 |
Colony count 37°C-enumeration of culturable microorganisms | prEN ISO 6222 |
Enterococci | ISO 7899-2 |
Escherichia coli (E coli) | ISO 9308-1 |
*The composition of m-CP agar is: | |
Basal medium | |
Tryptose | 30.0g |
Yeast extract | 20.0g |
Sucrose | 5.0g |
L-cysteine hydrochloride | 1.0g |
MgSO4·7H2O | 0.1g |
Bromocresol purple | 40.0mg |
Agar | 15.0g |
Water | 1,000.0ml |
Dissolve the ingredients of the basal medium, adjust pH to 7.6 and autoclave at 121°C for 15 minutes. Allow the medium to cool and add: | |
D-cycloserine | 400.0mg |
Polymyxine-B sulphate | 25.0mg |
Indoxyl-[beta]-D-glucoside to be dissolved in 8 ml sterile water before addition | 60.0mg |
Filter-sterilised 0.5% phenolphthalein diphosphate solution | 20.0 ml |
Filter-sterilised 4.5% FeCl3·6H2O | 2.0 ml |
Table A2Parameters for which, Subject to Regulation 16(7), Methods of Analysis are Prescribed
(1) | (2) | (3) | (4) |
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Parameters | Trueness % of prescribed concentration or value or specification | Precision % of prescribed concentration or value or specification | Limit of detection % of prescribed concentration or value or specification |
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Notes: |
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Aluminium | 10 | 10 | 10 |
Ammonium | 10 | 10 | 10 |
Antimony | 25 | 25 | 25 |
Arsenic | 10 | 10 | 10 |
Benzene | 25 | 25 | 25 |
Benzo(a)pyrene | 25 | 25 | 25 |
Boron | 10 | 10 | 10 |
Bromate | 25 | 25 | 25 |
Cadmium | 10 | 10 | 10 |
Chloride | 10 | 10 | 10 |
Chromium | 10 | 10 | 10 |
Colour | 10 | 10 | 10 |
Conductivity | 10 | 10 | 10 |
Copper | 10 | 10 | 10 |
Cyanide | 10 | 10 | 10 |
1,2-dichloroethane | 25 | 25 | 10 |
Fluoride | 10 | 10 | 10 |
Iron | 10 | 10 | 10 |
Lead | 10 | 10 | 10 |
Manganese | 10 | 10 | 10 |
Mercury | 20 | 10 | 20 |
Nickel | 10 | 10 | 10 |
Nitrate | 10 | 10 | 10 |
Nitrite | 10 | 10 | 10 |
Pesticides and related products | 25 | 25 | 25 |
Polycyclic aromatic hydrocarbons | 25 | 25 | 25 |
Selenium | 10 | 10 | 10 |
Sodium | 10 | 10 | 10 |
Sulphate | 10 | 10 | 10 |
Tetrachloromethane | 20 | 20 | 20 |
Trichloroethene | 25 | 25 | 10 |
Trihalomethanes: Total | 25 | 25 | 10 |
Turbidity | 10 | 10 | 10 |
Turbidity | 25 | 25 | 25 |
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