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The Private Water Supplies (Scotland) Regulations 1992
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- 1992 No. 575 (S. 64)
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Regulation 2(1)
SCHEDULE 1PRESCRIBED CONCENTRATIONS OR VALUES
Table A
| Item | Parameters | Units of measurement | Concentration or Value (maximum unless otherwise stated) |
|---|---|---|---|
| Note: (i) if silver is used in water treatment process, 80 may be substituted for 10. | |||
| 1. | Colour | mg/l 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 | 9.5, 5.5 (minimum) |
| 7. | Sulphate | mg SO4/l | 250 |
| 8. | Magnesium | mg Mg/l | 50 |
| 9. | Sodium | mg Na/l | 150 |
| 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. | Aluminum | μgAl/l | 200 |
| 22. | Iron | μgFe/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(i) |
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 |
|---|---|---|---|
| Note: (i) Analysis by multiple tube method. | |||
| 1. | Total coliforms | number/100 ml | 0 |
| 2. | Faecal coliforms | number/100 ml | 0 |
| 3. | Faecal streptococci | number/100 ml | 0 |
| 4. | Sulphite-reducing clostridia | number/20 ml | ≤1(i) |
| 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 | 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 | μg/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: (i) See regulation 3(4). | |||
| 1. | Total hardness | mg Ca/l | 60 |
| 2. | Alkalinity | mg HCO3/l | 30 |
Regulations 15 to 18
SCHEDULE 2SAMPLING FREQUENCIES FOR CLASSES A, B, 1 AND 2
| Parameter | Sampling Frequency (number per annum) | Sampling Frequency (number per annum) | ||||
|---|---|---|---|---|---|---|
| Class A and Class 1 | Class B and Class 2 | |||||
| Reduced | Standard | Increased | Reduced | Standard | Increased | |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) |
Notes: (i) Increased or reduced sampling where permitted or required may be confined to the substance in question. (ii) The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluo ranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1, 2, 3-cd) pyrene. | ||||||
| PART I: | ||||||
| Conductivity | 6 | 12 | 24 | 4 | 6 | 12 |
| Hydrogen ion | 6 | 12 | 24 | 4 | 6 | 12 |
| Odour (qualitative) | 6 | 12 | 24 | 4 | 6 | 12 |
| Taste (qualitative) | 6 | 12 | 24 | 4 | 6 | 12 |
| PART II: | ||||||
| Odour (quantitative) | — | 4 | 24 | — | 4 | 12 |
| Taste (quantitative) | — | 4 | 24 | — | 4 | 12 |
| Turbidity | — | 4 | 24 | — | 4 | 12 |
| Temperature | — | 4 | 24 | — | 4 | 12 |
| Nitrate | — | 4 | 24 | — | 4 | 12 |
| Nitrite | — | 4 | 24 | — | 4 | 12 |
| Ammonium | — | 4 | 24 | — | 4 | 12 |
| Iron | — | 4 | 24 | — | 4 | 12 |
| Aluminium | — | 4 | 24 | — | 4 | 12 |
| Manganese | — | 4 | 24 | — | 4 | 12 |
| Colour | — | 4 | 24 | — | 4 | 12 |
| PART III: | ||||||
| Trihalomethanes | 1 | 4 | 12 | 1 | 4 | 12 |
| Tetrachloromethane | 1 | 4 | 12 | 1 | 4 | 12 |
| Trichloroethene | 1 | 4 | 12 | 1 | 4 | 12 |
| Tetrachloroethene | 1 | 4 | 12 | 1 | 4 | 12 |
| Copper | 1 | 4 | 12 | 1 | 4 | 12 |
| Lead | 1 | 4 | 12 | 1 | 4 | 12 |
| Zinc | 1 | 4 | 12 | 1 | 4 | 12 |
| Pesticides and related products(i) | 1 | 4 | 12 | 1 | 4 | 12 |
| Polycyclic aromatic hydrocarbons(ii) | 1 | 4 | 12 | 1 | 4 | 12 |
| PART IV: | ||||||
| Chloride | — | 1 | 12 | — | 1 | 12 |
| Sulphate | — | 1 | 12 | — | 1 | 12 |
| Calcium | — | 1 | 12 | — | 1 | 12 |
| Magnesium | — | 1 | 12 | — | 1 | 12 |
| Sodium | — | 1 | 12 | — | 1 | 12 |
| Potassium | — | 1 | 12 | — | 1 | 12 |
| Dry residues | — | 1 | 12 | — | 1 | 12 |
| Oxidizability (permanganate value) | — | 1 | 12 | — | 1 | 12 |
| Total organic carbon | — | 1 | 12 | — | 1 | 12 |
| Boron | — | 1 | 12 | — | 1 | 12 |
| Surfactants | — | 1 | 12 | — | 1 | 12 |
| Phosphorus | — | 1 | 12 | — | 1 | 12 |
| Fluoride | — | 1 | 12 | — | 1 | 12 |
| Barium | — | 1 | 12 | — | 1 | 12 |
| Silver | — | 1 | 12 | — | 1 | 12 |
| Arsenic | — | 1 | 12 | — | 1 | 12 |
| Cadium | — | 1 | 12 | — | 1 | 12 |
| Cyanide | — | 1 | 12 | — | 1 | 12 |
| Chromium | — | 1 | 12 | — | 1 | 12 |
| Mercury | — | 1 | 12 | — | 1 | 12 |
| Nickel | — | 1 | 12 | — | 1 | 12 |
| Antimony | — | 1 | 12 | — | 1 | 12 |
| Selenium | — | 1 | 12 | — | 1 | 12 |
| Total hardness | — | 1 | 12 | — | 1 | 12 |
| Alkalinity | — | 1 | 12 | — | 1 | 12 |
| PART IV: | ||||||
| Total coliforms | — | 24 | — | — | 12 | 24 |
| Faecal coliforms | — | 24 | — | — | 12 | 24 |
| Residual disinfectant | — | 24 | — | — | 12 | 24 |
| Colony counts | — | 24 | — | — | 12 | |
Regulation 19
SCHEDULE 3SAMPLING FOR CLASSES C, D, E, 3, 4 AND 5
PART 1FREQUENCY
| Class of Supply | Basic Parameters(2) | Number of Samples(1) Additional Parameters(3) | Coliform Parameters(4) |
|---|---|---|---|
Notes: (1) Samples are to be taken each year except in the case of class E supplies (see note 5). If more than one sample is required, the samples must be taken on separate occasions. (2) The basic parameters are listed in column (1) of Part II of this Schedule. (3) The additional parameters are listed in column (2) of Part II of this Schedule. The islands or district council must sample for any additional parameters in respect of which there are reasonable grounds for believing that, because of any characteristics of the locality or of the supply’s distribution system, the concentration or value in respect of that parameter has caused or is likely to cause the water in the supply to become unwholesome. (4) The coliform parameters are total coliforms and faecal coliforms. Sampling for coliform parameters is additional to the coliform sampling carried out as part of sampling for basic parameters and must be carried out on separate occasions. (5) Class E supplies are to be sampled once for basic and additional parameters before 31st December 1994 unless— (a) they have been sampled for those parameters during 1990 or 1991; and (b) there are reasonable grounds for believing that no change has occurred or is likely to occur which may cause the quality of the supply to deteriorate. From 1st January 1995 all class E supplies are to be sampled once every 5 years. (6) The sampling frequency should be halved if the premises served by the supply are used for not more than six months in the year. (7) In the first year in which the supply is used as a class 3 supply, 2 samples must be taken in the first two months of the year and 3 in the remainder of that year. In 1992, 2 samples must be taken in the course of April, May and June and 2 in the remainder of that year. | |||
| C | 1 | 1 | 1 |
| D | 1 | 1 | — |
| E(5) | 1 | 1 | — |
| 3 | 2(6) | 2(6) | 4(6)(7) |
| 4 | 2(6) | 1(6) | — |
| 5 | — | — | 1 |
PART IIPARAMETERS
| Basic parameters | Additional Parameters | ||
|---|---|---|---|
| (1) | (2) | ||
Notes: (1) Samples need not be analysed for lead if there are reasonable grounds for believing that lead pipework or solder is not present in the plumbing of the property or that naturally occurring lead is not present in the water. (2) Samples need not be analysed for nitrate if there are reasonable grounds for believing that nitrate levels in the locality concerned are below 25 mg NO3/l. (3) Samples should not be assessed qualitatively for taste if there are reasonable grounds for suspecting that the water may give rise to a health hazard. (4) The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluo ranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3,-cd) pyrene. | |||
| Hydrogen ion | Odour (quantitative) | Zinc | Fluoride |
| Conductivity | Taste (quantitative) | Polycyclic aromatic hydrocarbons(4) | Barium |
| Total coliforms | Temperature | Silver | |
| Faecal coliforms | Nitrite | Chloride | Arsenic |
| Lead(1) | Ammonium | Sulphate | Cadmium |
| Nitrate(2) | Iron | Calcium | Cyanide |
| Odour (qualitative) | Aluminium | Magnesium | Chromium |
| Taste (qualitative)(3) | Manganese | Sodium | Mercury |
| Turbidity | Colour | Potassium | Nickel |
| Trihalomethanes | Dry residues | Antimony | |
| Tetrachloromethane | Oxidizability | Selenium | |
| Tricholoroethene | (permanganate value) | Total hardness | |
| Tetrachloroethene | Total organic carbon | Alkalinity | |
| Copper | Boron | Residual disinfectant | |
| Surfactants | Colony counts | ||
| Phosphorus | |||
Regulation 21(1)(b)
SCHEDULE 4MAXIMUM CHARGES FOR ANALYSIS
| Class of supply | Parameters sampled and analysed | Maximum charge |
|---|---|---|
| A,B,1,2 | Schedule 2: | |
| Part I | £20 | |
| Part II | £40 | |
| Part III | £270 | |
| Part IV | £350 | |
| Part V | £20 | |
| All parameters | £700 | |
| C,D,E,F,3,4,5 | Schedule 3 and regulation 14(7): | |
| Basic parameters | £40 | |
| Additional parameters: | £30 (for all or any of these parameters) | |
| Odour (quantitative) | ||
| Taste (quantitative) | ||
| Temperature | ||
| Nitrite | ||
| Ammonium | ||
| Iron | ||
| Aluminium | ||
| Manganese | ||
| Colour | ||
| Trihalomethanes | £50 (for all or any of these parameters) | |
| Tetrachloromethane | ||
| Trichloroethene | ||
| Tetrachloroethene | ||
| Copper | £15 (for both parameters or either of them) | |
| Zinc | ||
| Polycyclic aromatic hydrocarbons | £50 (for both parameters or either of them) | |
| Benzo 3.4 pyrene | ||
| Chloride | £40 (for all or any of these parameters) | |
| Sulphate | ||
| Calcium | ||
| Magnesium | ||
| Sodium | ||
| Potassium | ||
| Dry residues | ||
| Oxidizability | ||
| Total organic | £20 | |
| carbon | ||
| Boron | £40 | |
| Surfactants | £40 | |
| Phosphorus | £80 (for both parameters or either or them) | |
| Cyanide | ||
| Fluoride | £20 (for all or any of these parameters) | |
| Total hardness | ||
| Alkalinity | ||
| C,D,E,F,3,4,5 | Additional parameters: | |
| Barium | £100 (for all or any of these parameters) | |
| Silver | ||
| Arsenic | ||
| Cadmium | ||
| Chromium | ||
| Mercury | ||
| Nickel | ||
| Antimony | ||
| Selenium | ||
| Residual | £15 (for both parameters or either of them) | |
| disinfectant | ||
| Colony counts | ||
| Coliform parameters | £20 |
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