SCHEDULE 1PRESCRIBED CONCENTRATIONS AND VALUES
Table A Microbiological parameters
(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 |
(1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
|---|---|---|---|
1. | Coliform bacteria | 0 | number/100ml |
Table B Chemical parameters
(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 |
| µgPb/l |
|
|
| 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.
(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 |
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 Indicator parameters
Sch. 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)
Sch. 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)
Sch. 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)
Words 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)
Word 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)
Sch. 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)
(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)F9... | 0.10 | mSvF9... |
9. | Total organic carbon (TOC) | No abnormal change | mgC/l |
10. | Tritium (for radioactivity) F10(iii) | 100 | Bq/l |
F810A | Turbidity | Acceptable to consumers and no abnormal change |
Notes:
i
The water should not be aggressive.
F11ii
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.
Table D Microbiological and Chemical Parameters: Type B Supplies
(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 |
| 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.
Words 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)