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The Private Water Supplies (Scotland) Regulations 2006
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Regulations 2(1), 7, 8, 17-26 and 28
SCHEDULE 1SPRESCRIBED CONCENTRATIONS AND VALUES
This schedule has no associated Executive Note
Table A SMicrobiological parameters
Part I: Directive requirements
| (1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
|---|---|---|---|
| 1. | Enterococci | 0 | number/100ml |
| 2. | Escherichia coli (E. coli) | 0 | number/100ml |
Part II: National requirements
| (1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
|---|---|---|---|
| 1. | Coliform bacteria | 0 | number/100ml |
Table B SChemical parameters
Part I: Directive requirements
| (1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
|---|---|---|---|
| 1. | Acrylamide(i) | 0.10 | µg/1 |
| 2. | Antimony | 5.0 | µgSb/l |
| 3. | Arsenic | 10 | µgAs/l |
| 4. | Benzene | 1.0 | µg/l |
| 5. | Benzo(a)pyrene | 0.010 | µg/l |
| 6. | Boron | 1.0 | mgB/l |
| 7. | Bromate | 10 | µgBrO3/l |
| 8. | Cadmium | 5.0 | µgCd/l |
| 9. | Chromium | 50 | µgCr/l |
| 10. | Copper | 2.0 | mg Cu/l |
| 11. | Cyanide | 50 | µgCN/l |
| 12. | 1,2 dichloroethane | 3.0 | µg/l |
| 13. | Epichlorohydrin(i) | 0.10 | µg/l |
| 14. | Fluoride | 1.5 | mg F/l |
| 15. | Lead | (a)25, from 3/7/06 until 24/12/13 | µgPb/l |
(b)10, from 25/12/13 | µgPb/l | ||
| 16. | Mercury | 1.0 | µgHg/l |
| 17. | Nickel | 20 | µgNi/l |
| 18. | Nitrate | 50 | mgNO3/l |
| 19. | Nitrite | 0.50 | mgNO2/l |
| 20. | Pesticides(ii)– | ||
| Aldrin | 0.030 | µg/l | |
| Dieldrin | 0.030 | µg/l | |
| Heptachlor | 0.030 | µg/l | |
| Heptachlor epoxide | 0.030 | µg/l | |
| other pesticides | 0.10 | µg/l | |
| 21. | Pesticides: Total(iii) | 0.50 | µg/l |
| 22. | PAH(iv) | 0.10 | µg/l |
| 23. | Selenium | 10 | µgSe/l |
| 24. | Tetrachloroethene & Trichloroethene(v) | 10 | µg/l |
| 25. | THM: Total(vi) | 100 | µg/l |
| 26. | Vinyl chloride(i) | 0.50 | µg/l |
Notes:
(i)The parametric value refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water. This is controlled by product specification.
(ii)See the definition of “pesticides and related products” in regulation 2(1). The parametric value applies to each individual pesticide.
(iii)“Pesticides: Total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring procedure.
(iv)“PAH” means Polycyclic Aromatic Hydrocarbons, the specified compounds being:
– benzo(b)fluoranthene
– benzo(k)fluoranthene
– benzo(ghi)perylene
– indeno(1,2,3–cd)pyrene.
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
(v)The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
(vi)“THM: Total” means total Trihalomethanes, the specified compounds being:
– chloroform
– bromoform
– dibromochloromethane
– bromodichloromethane.
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
Part II: National requirements
| (1)Item | (2)Parameters | (3)Concentration or Value (maximum unless otherwise stated)) | (4)Units of Measurement |
|---|---|---|---|
| 1. | Aluminium | 200 | µgA1/1 |
| 2. | Colour | 20 | mg/l Pt/Co |
| 3. | F1. . . | F1. . . | F1. . . |
| 4. | Iron | 200 | µgFe/l |
| 5. | Manganese | 50 | µgMn/l |
| 6. | F2. . . | F2. . . | F2. . . |
| 7. | Silver(i) | 10 | µg Ag/l |
| 8. | Sodium | 200 | mgNa/l |
| 9. | F3. . . | F3. . . | F3. . . |
| 10. | Tetrachloromethane | 3 | µg/l |
| 11. | Turbidity(ii) | 4 | NTU |
| 12. | Zinc | 5000 | µg Zn/l |
Textual Amendments
F1 Sch. 1 Table B Pt. 2 entry omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(a)(i)
F2 Sch. 1 Table B Pt. 2 entry omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(a)(ii)
F3Sch. 1 Table B Pt. 2 entry omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(a)(iii)
Notes:
(i)If Silver is used in a water treatment process, 80 may be substituted for 10.
(ii)Every effort should be made to achieve 1 NTU whenever possible.
Table C SIndicator parameters
Directive requirements
| (1)Item | (2)Parameters | (3)Concentration or Value (maximum [F4unless otherwise stated]) or State | (4)Units of Measurement |
|---|---|---|---|
| 1. | Ammonium | 0.50 | mgNH4/l |
| 2. | Chloride(i) | 250 | mgC1/1 |
| 3. | Clostridium perfringens (including spores) | 0 | Number/100 ml |
| 4. | Coliform bacteria | 0 | Number/100 ml |
| 5. | Colony count | No abnormal change | Number/1 ml at 22°C |
| [F55A | Colour | Acceptable to consumers and no abnormal change] | |
| 6. | Conductivity(i) | 2500 | µS/cm at 20°C |
| [F66A | Hydrogen ion | 9.5 6.5 (minimum) | pH value] |
| [F66B | Odour | Acceptable to consumers and no abnormal change] | |
| [F66C. | Radon (for radioactivity)(ii) | 100 | Bq/l] |
| 7. | Sulphate(i) | 250 | mgSO4/l |
| [F77A | Taste | Acceptable to consumers and no abnormal change] | |
| 8. | Total indicative dose (for radioactivity)F8... | 0.10 | mSvF8... |
| 9. | Total organic carbon (TOC) | No abnormal change | mgC/l |
| 10. | Tritium (for radioactivity) [F9(iii)] | 100 | Bq/l |
| [F1010A | Turbidity | Acceptable to consumers and no abnormal change] |
Textual Amendments
F4Words in Sch. 1 Table C inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(i)
F5Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(ii)
F6Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(iii)
F7Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(iv)
F8Words in Sch. 1 Table C omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(vi)
F9Word in Sch. 1 Table C inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(vii)
F10Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(v)
Notes:
(i)The water should not be aggressive.
[F11(ii)Remedial action is to be deemed justified on radiological protection grounds, without further consideration, where radon concentrations exceed 1,000 Bq/l.
(iii)If the concentration of tritium exceeds this value, an analysis of the presence of other artificial radionuclides must be also carried out by Scottish Water.]
Textual Amendments
F11Sch. 1 Table C Note (ii)(iii) substituted for Sch. 1 Table C Note (ii) (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(c)
Table D SMicrobiological and Chemical Parameters: Type B Supplies
National Requirements
| (1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
|---|---|---|---|
| 1. | Coliform Bacteria | 0 | number/100ml |
| 2. | Conductivity (i) | 2500 | µS/cm at 20°C |
| 3. | Enterococci | 0 | number/100ml |
| 4. | Escherichia coli (E.coli) | 0 | number/100ml |
| 5. | Hydrogen ion | 9.5 6.5 (minimum) | pH value |
| 6. | Lead | (a)25, from 3/7/06 until 24/12/13 (b)10, from 25/12/13 | µgPb/l |
| 7. | Nitrate | 50 | mgNO3/l |
| 8. | Odour-qualitative | - | - |
| 9. | Taste-qualitative | - | - |
| 10. | Turbidity | 4 | NTU |
Notes:
(i)The water should not be aggressive.
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