SCHEDULE 1EXERCISE OF POWERS
1. The powers conferred by sections 52 and 53 are exercised by the Secretary of State for Wales, in relation to companies appointed by him to be water undertakers, and by the Secretary of State for the Environment, in relation to other water undertakers; and in this paragraph and paragraph 3 the reference to a company appointed by the Secretary of State to be a water undertaker includes a reference to a company appointed with the consent of, or in accordance with a general authorisation given by, the Secretary of State.
2. The powers conferred by section 56 are exercised by the Secretary of State for Wales, as respects local authorities exercising functions in Wales, and by the Secretary of State for the Environment, as respects local authorities exercising functions in England.
3. The powers conferred by section 65 are exercised–
(a)insofar as they relate to the matters specified in subsection (2)(a) to (d), by the Secretary of State for the Environment and the Secretary of State for Wales jointly;
(b)insofar as they relate to the matters specified in subsection (2)(e), by the Secretary of State for Wales, as respects water supplied in Wales by a private supplier and water supplied (whether or not in Wales) by a company appointed by him to be a water undertaker, and by the Secretary of State for the Environment, as respects water supplied in England by a private supplier and water supplied (whether or not in England) by a company appointed by him to be a water undertaker; and
(c)insofar as they relate to the matter specified in subsection (2)(f), by the Secretary of State for Wales, as respects local authorities exercising functions in Wales, and by the Secretary of State for the Environment, as respects local authorities exercising functions in England.
Regulation 3
SCHEDULE 2PRESCRIBED CONCENTRATIONS OR VALUES
TABLE A
Item | Parameters | Units of Measurement | Concentration or Value (maximum unless otherwise stated) |
---|
Note
(ii) If silver is used in a water treatment process, 80 may be substituted for 10.
|
1. | Colour | mg/1 Pt/Co scale | 20 |
2. | Turbidity (including suspended solids) | Formazin turbidity units | 4 |
3. | Odour (including hydrogen sulphide) | Dilution number | 3 at 25°C |
4. | Taste | Dilution number | 3 at 25°C |
5. | Temperature | °C | 25 |
6. | Hydrogen ion | pH value | 9.55.5 (minimum) |
7. | Sulphate | mg SO4/l | 250 |
8. | Magnesium | mg Mg/l | 50 |
9. | Sodium | mg Na/l | 150(i) |
10. | Potassium | mg K/l | 12 |
11. | Dry residues | mg/l | 1500 (after drying at 180°C) |
12. | Nitrate | mg NO3/l | 50 |
13. | Nitrite | mg NO2/l | 0.1 |
14. | Ammonium (ammonia and ammonium ions) | mg NH4/l | 0.5 |
15. | Kjeldahl nitrogen | mg N/l | 1 |
16. | Oxidizability (permanganate value) | mg O2/l | 5 |
17. | Total organic carbon | mg C/l | No significant increase over that normally observed |
18. | Dissolved or emulsified hydrocarbons (after extraction with petroleum ether); mineral oils | μG/L | 10 |
19. | Phenols | μg C6H5OH/l | 0.5 |
20. | Surfactants | μg/l (as lauryl sulphate) | 200 |
21. | Aluminium | μg Al/l | 200 |
22. | Iron | μg Fe/l | 200 |
23. | Manganese | μg Mn/l | 50 |
24. | Copper | μg Cu/l | 3000 |
25. | Zinc | μg Zn/l | 5000 |
26. | Phosphorus | μg P/l | 2200 |
27. | Fluoride | μg F/l | 1500 |
28. | Silver | μg Ag/l | 10(ii) |
TABLE B
Item | Parameters | Units of Measurement | Maximum Concentration |
---|
Notes
(i) The sum of the detected concentrations of individual substances.
(ii) The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3-cd) pyrene.
|
1. | Arsenic | μg As/l | 50 |
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 | 50 |
7. | Lead | μg Pb/l | 50 |
8. | Antimony | μg Sb/l | 10 |
9. | Selenium | μg Se/l | 10 |
10. | Pesticides and related products: | | |
(a)individual substances
| μg/l | 0.1 |
(b)total substances(i)
| μg/l | 0.5 |
11. | Polycyclic aromatic hydrocarbons(ii) | μg/l | 0.2 |
TABLE C
Item | Parameters | Units of Measurement | Maximum Concentration |
---|
Notes
(ii) Analysis by multiple tube method.
|
1. | Total coliforms | number/100 ml | 0(i) |
2. | Faecal coliforms | number/100 ml | 0 |
3. | Faecal streptococci | number/100 ml | 0 |
4. | Sulphite-reducing clostridia | number/20 ml | ≤1(ii) |
5. | Colony counts | number/1 ml at 22°C or 37°C | No significant increase over that normally observed |
TABLE D(i)
Item | Parameters | Units of Measurement | Maximum Concentration or Value |
---|
Note:
(i) See regulation 3(3)(d).
|
1. | Conductivity | μS/cm | 1500 at 20°C |
2. | Chloride | mg Cl/l | 400 |
3. | Calcium | mg Ca/l | 250 |
4. | Substances extractable in chloroform | mg/l dry residue | 1 |
5. | Boron | μg B/l | 2000 |
6. | Barium | μg Ba/l | 1000 |
7. | Benzo 3,4 pyrene | ng/l | 10 |
8. | Tetrachloromethane | μg/l | 3 |
9. | Trichloroethene | μg/l | 30 |
10. | Tetrachloroethene | μg/l | 10 |
TABLE E
Item | Parameters | Units of Measurement | Minimum Concentration(i) |
---|
Note:
|
1. | Total hardness | mg Ca/l | 60 |
2. | Alkalinity | mg HCO3/l | 30 |
Regulations 13 and 17
SCHEDULE 3SAMPLING FREQUENCIES
TABLE 1:
Sampling frequencies at consumers' taps
Parameters | Water Supply Zone | Sampling Frequency (number per annum) |
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| Volume distributed (m3/d) for domestic purposes | Population Supplied | Reduced | Standard | Increased |
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| | | Ground water | Surface water | | |
---|
Conductivity or | ≤100 | ≤500 | | | 4 | 12 |
hydrogen ion | 101– 1000 | 501– 5000 | 4 | 4 | 6 | 12 |
Odour | 1001– 2000 | 5001–10000 | 4 | 6 | 12 | 24 |
(qualitative) | 2001– 4000 | 10001–20000 | 6 | 2 | 24 |
Taste | 4001– 7000 | 20001–35000 | 11 | 21 | 42 |
(qualitative) | 7001–10000 | 35001–50000 | 15 | 30 | 60 |
TABLE 2:
Sampling frequencies at consumers' taps
Parameters | Water Supply Zone | Sampling Frequency (number per annum) |
---|
| Volume distributed (m3/d) for domestic purposes | Population Supplied | Reduced | Standard | Increased |
---|
| | | Ground water | Surface water | | |
---|
Odour (quantitative) | | | | | | |
Taste (quantitative) | | | | | | |
Turbidity | ≤100 | ≤500 | | | 4 | 12 |
Temparture | 101– 1000 | 501– 5000 | | | 4 | 12 |
Hydrogen ion | 1001– 2000 | 5001–10000 | | | 4 | 24 |
Nitrate | 2001– 4000 | 10001–20000 | 4 | 4 | 6 | 24 |
Nitrate | 4001– 7000 | 20001–35000 | 4 | 5 | 10 | 36 |
Ammonium | 7001–10000 | 35001–50000 | 4 | 5 | 10 | 48 |
Iron | | | | | | |
Aluminium | | | | | | |
Manganese | | | | | | |
Colour | | | | | | |
TABLE 3:
Sampling frequencies at consumers' taps
Parameters | Water Supply Zone | Sampling Frequency (number per annum) |
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| Volume distributed (m3/d) for domestic purposes | Population Supplied | Reduced | Standard | Increased |
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Notes
(i) ie any fungicide, herbicide or insecticide; increased or reduced sampling, where required or permitted, may be confined to the substance in question.
(ii) The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3-cd) pyrene.
|
Trihalomethanes | ≤7000 | ≤35000 | 1 | 4 | 12 |
Tetrachloromethane | | | | | |
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Trichloroethene | | | | | |
---|
Tetrachloroethene | | | | | |
---|
Copper | | | | | |
---|
Lead | 7001–10000 | 35001–50000 | 1 | 4 | 24 |
Zinc | | | | | |
Pesticides(i) | | | | | |
Polycyclic aromatic hydrocarbons(ii) | | | | | |
TABLE 4:
Sampling frequencies at consumers' taps
Parameters | Sampling Frequency(number per annum) |
---|
| Standard | Increased |
---|
Chloride | | |
Sulphate | | |
Calcium | | |
Magnesium | | |
Sodium | | |
Potassium | | |
Dry residues | | |
Oxidizability (permanganate value) | | |
Total organic carbon | | |
Boron | | |
Surfactants | | |
Phosphorus | 1 | 12 |
Fluoride | | |
Barium | | |
Silver | | |
Arsenic | | |
Cadmium | | |
Cyanide | | |
Chromium | | |
Mercury | | |
Nickel | | |
Antimony | | |
Selenium | | |
Total hardness | | |
Alkalinity | | |
TABLE 5:
Sampling frequencies at supply points
Water Supply Zone or Combination of Zones | Sampling Frequency (number per annum) |
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Volume distributed (m3/d) for domestic purposes | Population Supplied | Table 1 Parameters | Table 2 Parameters | Table 3 Parameters | Table 4 Parameters |
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| | Reduced | Standard | Increased | Reduced | Standard | Increased | Reduced | Standard | Increased | Reduced | Standard | Increased |
---|
| | GW | SW | | | GW | SW | | | GW | SW | | | GW | SW | | |
---|
GW = Ground water
SW = Surface water
|
≤100 | ≤500 | | | 4 | 12 | | | 4 | 12 | 1 | 2 | 4 | 12 | | | 1 | 12 |
101– 1000 | 501– 5000 | 4 | 4 | 6 | 12 | | | 4 | 12 | 1 | 2 | 4 | 12 | | | 1 | 12 |
1001– 2000 | 5001– 10000 | 4 | 6 | 12 | 24 | | | 4 | 24 | 1 | 2 | 4 | 12 | | | 1 | 12 |
2001– 4000 | 10001– 20000 | 6 | 12 | 24 | | 4 | 4 | 6 | 24 | 1 | 2 | 4 | 12 | | | 1 | 12 |
4001– 10000 | 20001– 50000 | 15 | 30 | 60 | | 4 | 5 | 10 | 60 | 1 | 2 | 4 | 12 | | | 1 | 12 |
10001– 20000 | 50001– 100000 | 30 | 60 | 120 | | 5 | 10 | 20 | 60 | 2 | 3 | 6 | 24 | 1 | 1 | 2 | 24 |
20001– 30000 | 100001– 150000 | 45 | 90 | 180 | | 8 | 15 | 30 | 60 | 2 | 3 | 6 | 24 | 1 | 2 | 3 | 24 |
30001– 60000 | 150001– 300000 | 90 | 180 | 360 | | 15 | 30 | 60 | 120 | 2 | 3 | 6 | 24 | 2 | 3 | 6 | 24 |
60001–100000 | 300001– 500000 | 90 | 180 | 360 | | 30 | 60 | 120 | | 3 | 5 | 10 | 24 | 3 | 5 | 10 | 24 |
100001–200000 | 500001–1000000 | 90 | 180 | 360 | | 30 | 60 | 120 | | 5 | 10 | 20 | 36 | 5 | 10 | 20 | 36 |
TABLE 6:
Sampling frequencies at consumers' taps
Parameters | Water Supply Zone | Sampling Frequency (number per annum) |
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| Volume distributed (m3/d) for domestic purposes | Population Supplied | Standard |
---|
Total coliforms } | ≤100 | ≤500 | 12 |
Faecal coliforms } | 101–1000 | 501– 5000 | 12 |
Residual disinfectant } | 1001–2000 | 5001–10000 | 24 |
Colony counts } | 2001–4000 | 10001–20000 | 48 |
| | 20001–50000 | at the rate of 12 per 5000 population except in the case of colony counts where the standard number is 5. |
TABLE 7:
Sampling frequencies for treatment works
Parameters | Volume of water supplied (m3/d) for domestic purposes | Sampling frequency (number per annum) |
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| | Reduced | Standard |
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1. Total and faecal coliforms,
| ≤2000 | 12 | 52 |
residual disinfectant and colony counts
| 2001–6000 | 52 | 104 |
2. Total and faecal coliforms
| 6001–12000 | 104 | 208 |
and residual disinfectant | >12000 | 104 | 365 |
3. Colony counts
| >6000 | 52 | 104 |
Regulation 30(4)
SCHEDULE 4INFORMATION FOR LOCAL AUTHORITIES
Regulation 31(2)
SCHEDULE 5INFORMATION TO BE INCLUDED IN ANNUAL REPORT