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The Private Water Supplies (Scotland) Regulations 2006
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Changes over time for: SCHEDULE 1
Version Superseded: 28/11/2015
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- 03/07/2006- Amendment
- 03/07/2006
Point in time - 28/11/2015- Amendment
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Point in time view as at 03/07/2006.
Changes to legislation:
There are currently no known outstanding effects for the The Private Water Supplies (Scotland) Regulations 2006, SCHEDULE 1.
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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. | Hydrogen ion | 9.5 | pH value |
| 6.5 (minimum) | |||
| 4. | Iron | 200 | µgFe/l |
| 5. | Manganese | 50 | µgMn/l |
| 6. | Odour | 3 at 25ºC | Dilution number |
| 7. | Silver(i) | 10 | µg Ag/l |
| 8. | Sodium | 200 | mgNa/l |
| 9. | Taste | 3 at 25ºC | Dilution number |
| 10. | Tetrachloromethane | 3 | µg/l |
| 11. | Turbidity(ii) | 4 | NTU |
| 12. | Zinc | 5000 | µg Zn/l |
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) 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 |
| 6. | Conductivity(i) | 2500 | µS/cm at 20°C |
| 7. | Sulphate(i) | 250 | mgSO4/l |
| 8. | Total indicative dose (for radioactivity)(ii) | 0.10 | mSv/year |
| 9. | Total organic carbon (TOC) | No abnormal change | mgC/l |
| 10. | Tritium (for radioactivity) | 100 | Bq/l |
Notes:
(i)The water should not be aggressive.
(ii)Excluding tritium, potassium – 40, radon and radon decay products.
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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