- Draft legislation
This is a draft item of legislation. This draft has since been made as a Scottish Statutory Instrument: The Public Water Supplies (Scotland) Regulations 2014 No. 364
Regulation 2(1) and (4)
(1) Item | (2) Parameter | (3) Concentration or value (maximum) | (4) Units of measurement | (5) Point of compliance |
---|---|---|---|---|
(a) The parametric values in Part 2 are not required to protect human health (since the parametric values in Part 1 are sufficient for that purpose). The values in Part 2 are not therefore set for the purposes of Article 5(3) of the Directive. | ||||
(b) Compliance required as to 95% of samples from each service reservoir (regulation 4(4)). | ||||
Part 1 | ||||
1. | Enterococci | 0 | Number/100ml | Consumer’s tap |
2. | Escherichia coli | 0 | Number/100ml | Consumer’s tap |
Part 2(a) | ||||
3. | Coliform bacteria | 0 | Number/100ml | Service reservoir(b) |
0 | Number/100ml | Treatment works | ||
4. | Escherichia coli | 0 | Number/100ml | Service reservoir |
0 | Number/100ml | Treatment works | ||
Notes— |
(1) Item | (2) Parameter | (3) Concentration or value (maximum) | (4) Units of measurement | (5) Point of compliance |
---|---|---|---|---|
(a) 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. | ||||
(b) See also regulation 6(6). | ||||
(c) See also regulation 4(2)(c). | ||||
(d) The corresponding parametric value applies to each ‘other pesticide’ individually. | ||||
(e) The parametric values in this Part are not required to protect human health (since the parametric values in Part 1 are sufficient for that purpose). The values in Part 2 are not therefore set for the purposes of Article 5(3) of the Directive. | ||||
Part 1 | ||||
1. | Acrylamide(a) | 0.10 | μg/l | Consumer’s tap |
2. | Antimony | 5.0 | μgSb/l | Consumer’s tap |
3. | Arsenic | 10 | μgAs/l | Consumer’s tap |
4. | Benzene | 1.0 | μg/l | Consumer’s tap |
5. | Benzo(a)pyrene | 0.010 | μg/l | Consumer’s tap |
6. | Boron | 1.0 | mgB/l | Consumer’s tap |
7. | Bromate | 10 | μgBrO3/l | Consumer’s tap |
8. | Cadmium | 5.0 | μgCd/l | Consumer’s tap |
9. | Chromium | 50 | μgCr/l | Consumer’s tap |
10. | Copper(b) | 2.0 | mgCu/l | Consumer’s tap |
11. | Cyanide | 50 | μgCN/l | Consumer’s tap |
12. | 1,2-dichloroethane | 3.0 | μg/l | Consumer’s tap |
13. | Epichlorohydrin(a) | 0.10 | μg/l | Consumer’s tap |
14. | Fluoride | 1.5 | mgF/l | Consumer’s tap |
15. | Lead(b) | 10 | μgPb/l | Consumer’s tap |
16. | Mercury | 1.0 | μgHg/l | Consumer’s tap |
17. | Nickel(b) | 20 | μgNi/l | Consumer’s tap |
18. | Nitrate(c) | 50 | mgNO3/l | Consumer’s tap |
19. | Nitrite(c) | 0.50 | mgNO2/l | Consumer’s tap |
0.10 | mgNO2/l | Treatment works | ||
20. | Pesticide— | |||
Aldrin | 0.030 | μg/l | Consumer’s tap | |
Dieldrin | 0.030 | μg/l | Consumer’s tap | |
Heptachlor | 0.030 | μg/l | Consumer’s tap | |
Heptachlor epoxide | 0.030 | μg/l | Consumer’s tap | |
Other pesticide(d) | 0.10 | μg/l | Consumer’s tap | |
21. | Pesticides: Total | 0.50 | μg/l | Consumer’s tap |
22. | PAH: Total | 0.10 | μg/l | Consumer’s tap |
23. | Selenium | 10 | μgSe/l | Consumer’s tap |
24. | Tetrachloroethene and Trichloroethene | 10 | μg/l | Consumer’s tap |
25. | THM: Total | 100 | μg/l | Consumer’s tap |
26. | Vinyl chloride(a) | 0.50 | μg/l | Consumer’s tap |
Part 2(e) | ||||
27. | Aluminium | 200 | μgAl/l | Consumer’s tap |
28. | Colour | 20 | mg/l Pt/Co | Consumer’s tap |
29. | Iron | 200 | μgFe/l | Consumer’s tap |
30. | Manganese | 50 | μgMn/l | Consumer’s tap |
31. | Sodium | 200 | mgNa/l | Consumer’s tap |
32. | Tetrachloromethane | 3 | μg/l | Consumer’s tap |
33. | Turbidity | 4 | NTU | Consumer’s tap |
Notes— |
(1) Item | (2) Parameter | (3) Concentration or value (maximum) or state | (4) Units of measurement | (5) Point of monitoring |
---|---|---|---|---|
(a) The water should not be aggressive. | ||||
(b) In the event that the use of samples from a point within a water supply zone has not be been authorised for this parameter under regulation 8, the point of monitoring is instead the consumer’s tap. | ||||
(c) This value, in so far as the point of monitoring is a service reservoir, is not set for the purposes of Article 5(3) of the Directive. | ||||
(d) This value, in so far as the point of monitoring is a treatment works, is not set for the purposes of Article 5(3) of the Directive. | ||||
Part 1 | ||||
1. | Ammonium | 0.50 | mgNH4/l | Consumer’s tap |
2. | Chloride(a) | 250 | mgCl/l | Supply point(b) |
3. | Clostridium perfringens (including spores) | 0 | Number/100ml | Supply point(b) |
4. | Coliform bacteria | 0 | Number/100ml | Consumer’s tap |
5. | Colony count | No abnormal change | Number/1ml at 22°C and at 37°C | Consumer’s tap |
Service reservoir(c) | ||||
Treatment works(d) | ||||
6. | Colour | Acceptable to consumers and no abnormal change | Consumer’s tap | |
7. | Conductivity(a) | 2500 | μS/cm at 20°C | Supply point(b) |
8. | Hydrogen ion | 9.5 | pH value | Consumer’s tap |
6.5 (minimum) | ||||
9. | Odour | Acceptable to consumers and no abnormal change | Consumer’s tap | |
10. | Sulphate(a) | 250 | mgSO4/l | Supply point(b) |
11. | Taste | Acceptable to consumers and no abnormal change | Consumer’s tap | |
12. | Total organic carbon | No abnormal change | mgC/l | Supply point(b) |
13. | Turbidity | 1 | NTU | Treatment works |
Part 2 | ||||
14. | Indicative dose | 0.10 | mSv/year | Supply point(b) |
15. | Tritium | 100 | Bq/l | Supply point(b) |
Notes— |
In this Schedule—
“Indicative dose” means the committed effective dose for one year of ingestion resulting from all the radionuclides (whose presence has been detected in water supplied for human consumption purposes) of natural and artificial origin, but excluding tritium, potassium-40, radon and radon decay products;
“NTU” means Nephelometric Turbidity Unit;
“PAH: Total” means the sum of the concentrations of the following polyaromatic hydrocarbons: benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(ghi)perylene and indeno(1,2,3-cd)pyrene;
“Pesticide” means an organic insecticide, herbicide, fungicide, nematocide, acaricide, algicide, rodenticide, slimicide, molluscicide or related product (including a growth regulator), and includes the relevant metabolites, degradation and reaction products of that pesticide;
“Pesticides: Total” refers to the sum of the concentrations of each pesticide detected and quantified in the monitoring procedure;
“Tetrachloroethene and Trichloroethene” means the sum of the concentrations of tetrachloroethene and trichloroethene; and
“THM: Total” means the sum of the concentrations of the following trihalomethanes: chloroform, bromoform, dibromochloromethane and bromodichloromethane.
Regulations 2(1), 2(4), 9 and 11
(1) Item | (2) Parameter | (3) Circumstances |
---|---|---|
1. | Aluminium | When used as flocculant or where the water originates from, or is influenced by, surface waters. |
2. | Ammonium | |
3. | Clostridium perfringens (including spores) | Where the water originates from, or is influenced by, surface waters. |
4. | Coliform bacteria | |
5. | Colony count | |
6. | Colour | |
7. | Conductivity | |
8. | Escherichia coli | |
9. | Hydrogen ion | |
10. | Iron | When used as flocculant or where the water originates from, or is influenced by, surface waters. |
11. | Manganese | Where the water originates from, or is influenced by, surface waters. |
12. | Nitrate | When chloramination is practised. |
13. | Nitrite | When chloramination is practised. |
14. | Odour | |
15. | Taste | |
16. | Turbidity |
(1) Item | (2) Parameter | (3) Estimated population of water supply zone | (4) Reduced | (5) Standard |
---|---|---|---|---|
(a) Sampling at the frequencies specified in this table for check monitoring is required only when the circumstances for this parameter in column (3) of Table 1 apply (see regulation 6(4)(b)). Where this is not the case, sampling at the frequencies specified in this table for audit monitoring is required instead. | ||||
(b) Subject to note (e), samples for this parameter may, to the extent authorised under regulation 8 for a water supply zone, be taken from alternative supply points in accordance with regulation 9(1)(b). | ||||
(c) Only those pesticides which are likely to be present in a given supply need to be monitored. | ||||
(d) Where the population is not an exact multiple of 5,000, the population figure should be rounded up to the nearest multiple of 5,000. | ||||
(e) If sodium hypochlorite is added after water has left a treatment works in the water supply zone, monitoring for this parameter must be carried out at sampling points (rather than at supply points). | ||||
Subject to check monitoring | ||||
1. | Coliform bacteria | < 100 | – | 4 |
2. | Escherichia coli | ≥100 | – | 12 per 5,000 |
3. | Residual disinfectant | population(d) | ||
4. | Aluminium(a) | < 100 | 1 | 2 |
5. | Ammonium | 100-4,999 | 2 | 4 |
6. | Clostridium perfringens (including spores)(a) (b) | 5,000-9,999 | 6 | 12 |
10,000-29,999 | 12 | 24 | ||
7. | Colony count | 30,000-49,999 | 18 | 36 |
8. | Colour | 50,000-79,999 | 26 | 52 |
9. | Conductivity(b) | 80,000-100,000 | 38 | 76 |
10. | Hydrogen ion | |||
11. | Iron(a) | |||
12. | Manganese(a) | |||
13. | Nitrate(a) | |||
14. | Nitrite(a) | |||
15. | Odour | |||
16. | Taste | |||
17. | Turbidity | |||
Subject to audit monitoring | ||||
18. | Antimony | < 100 | – | 1 |
19. | Arsenic | 100-4,999 | – | 4 |
20. | Benzene(b) | 5,000-100,000 | – | 8 |
21. | Benzo(a)pyrene | |||
22. | Boron(b) | |||
23. | Bromate(b) (e) | |||
24. | Cadmium | |||
25. | Chloride(b) | |||
26. | Chromium | |||
27. | Copper | |||
28. | Cyanide(b) | |||
29. | 1,2-dichloroethane(b) | |||
30. | Enterococci | |||
31. | Fluoride(b) | |||
32. | Lead | |||
33. | Mercury(b) | |||
34. | Nickel | |||
35. | Pesticide(b) (c) | |||
36. | PAH: Total | |||
37. | Selenium | |||
38. | Sodium | |||
39. | Sulphate(b) | |||
40. | Tetrachloroethene and Trichloroethene(b) | |||
41. | Tetrachloromethane(b) | |||
42. | THM: Total | |||
43. | Total organic carbon(b) | |||
44. | Indicative dose— | |||
Gross alpha(b) | ||||
Gross beta(b) | ||||
45. | Tritium(b) | |||
Notes— |
(1) Item | (2) Parameter | (3) Volume of water supplied m3/d | (4) Reduced | (5) Standard |
---|---|---|---|---|
Notes— | ||||
(a) Sampling at the frequencies specified in this table for check monitoring is required only where the water originates from, or is influenced by, surface waters (see Table 1). Where this is not the case, sampling at the frequencies specified in this table for audit monitoring is required instead. | ||||
(b) If sodium hypochlorite is added after water has left a treatment works in the water supply zone, audit monitoring for this parameter must be carried out at sampling points (rather than at supply points). | ||||
(c) Only those pesticides which are likely to be present in a given supply need to be monitored. | ||||
Subject to check monitoring | ||||
1. | Clostridium perfringens (including spores)(a) | < 20 | – | 2 |
20-999 | 2 | 4 | ||
2. | Conductivity | 1,000-1,999 | 6 | 12 |
2,000-5,999 | 12 | 24 | ||
6,000-9,999 | 18 | 36 | ||
10,000-15,999 | 26 | 52 | ||
16,000-32,999 | 52 | 104 | ||
33,000-49,999 | 78 | 156 | ||
50,000-67,999 | 104 | 208 | ||
68,000-84,999 | 130 | 260 | ||
85,000-101,999 | 156 | 312 | ||
102,000-119,999 | 183 | 365 | ||
120,000-241,999 | 365 | 730 | ||
242,000-484,999 | 730 | 1,460 | ||
485,000-728,999 | 1,095 | 2,190 | ||
Subject to audit monitoring | ||||
3. | Benzene | < 20 | – | 1 |
4. | Boron | 20-999 | – | 4 |
5. | Bromate(b) | 1,000-49,999 | – | 8 |
6. | Chloride | 50,00-89,999 | – | 12 |
7. | Cyanide | 90,000-299,999 | – | 24 |
8. | 1,2-dichloroethane | 300,000-649,999 | – | 36 |
9. | Fluoride | ≥ 650,000 | – | 48 |
10. | Mercury | |||
11. | Pesticide(c) | |||
12. | Sulphate | |||
13. | Tetrachloroethene and Trichloroethene | |||
14. | Tetrachloromethane | |||
15. | Total organic carbon | |||
16. | Indicative dose— | |||
Gross alpha | ||||
Gross beta | ||||
17. | Tritium |
(1) Item | (2) Parameter | (3) Volume of water supplied m3/d | (4) Reduced | (5) Standard |
---|---|---|---|---|
Notes— | ||||
(a) Sampling at the frequencies specified in this table for check monitoring is required only when chloramination is practised. When this is not the case, this parameter must be sampled instead at the frequencies specified in this table for audit monitoring. | ||||
Subject to check monitoring | ||||
1. | Coliform bacteria | < 20 | – | 4 |
2. | Colony count | 20-1,999 | 12 | 52 |
3. | Escherichia coli | 2,000-5,999 | 52 | 104 |
4. | Residual disinfectant | 6,000-11,999 ≥12,000 | 104 208 | 208 365 |
5. | Nitrite(a) | < 20 | – | 2 |
6. | Turbidity | 20-999 | 2 | 4 |
1,000-1,999 | 6 | 12 | ||
2,000-5,999 | 12 | 24 | ||
6,000-9,999 | 18 | 36 | ||
10,000-15,999 | 26 | 52 | ||
16,000-32,999 | 52 | 104 | ||
33,000-49,999 | 78 | 156 | ||
50,000-67,999 | 104 | 208 | ||
68,000-84,999 | 130 | 260 | ||
85,000-101,999 | 156 | 312 | ||
102,000-119,999 | 183 | 365 | ||
120,000-241,999 | 365 | 730 | ||
242,000-484,999 | 730 | 1,460 | ||
485,000-728,999 | 1,095 | 2,190 | ||
Subject to audit monitoring | ||||
7. | Nitrite(a) | < 20 | – | 1 |
20-999 | – | 4 | ||
1,000-49,999 | – | 8 | ||
50,000-89,999 | – | 12 | ||
90,000-299,999 | – | 24 | ||
300,000-649,999 | – | 36 | ||
≥650,000 | – | 48 |
In this Schedule “Indicative dose”, “Pesticide”, “PAH: Total”, “Tetrachloroethene and Trichloroethene” and “THM: Total” have the same meanings as they have in Schedule 1.
Regulations 2(1), 2(4) and 15(5)
(1) Item | (2) Parameter | (3) Method | ||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(a) The composition of m-CP agar is: Basal medium— Dissolve the ingredients of the basal medium, adjust pH to 7.6 and autoclave at 121°C for 15 minutes.
Allow the medium to cool and add—
| ||||||||||||||||||||||||||||
1. | Clostridium perfringens (including spores) | Membrane filtration followed by anaerobic incubation of the membrane on m-CP agar(a) at 44 ± 1°C for 21 ± 3 hours. Count opaque yellow colonies that turn pink or red after exposure to ammonium hydroxide vapours for 20 to 30 seconds. | ||||||||||||||||||||||||||
2. | Coliform bacteria | ISO 9308-1 | ||||||||||||||||||||||||||
3. | Colony count 22°C — enumeration of culturable microorganisms | prEN ISO 6222 | ||||||||||||||||||||||||||
4. | Colony count 37°C — enumeration of culturable microorganisms | prEN 6222 | ||||||||||||||||||||||||||
5. | Enterococci | ISO 7899-2 | ||||||||||||||||||||||||||
6. | Escherichia coli | ISO 9308-1 | ||||||||||||||||||||||||||
Notes— |
(1) Item | (2) Parameter | (3) Trueness % of prescribed concentration or value | (4) Precision % of prescribed concentration or value | (5) Limit of detection % of prescribed concentration or value |
---|---|---|---|---|
Notes— | ||||
(a) The method of analysis should determine total cyanide in all forms. | ||||
(b) The capabilities required apply in relation to each individual pesticide. | ||||
(c) The capabilities required apply in relation to each individual substance comprising PAH: Total at 25% of the prescribed concentration or value for PAH: Total. | ||||
(d) The capabilities required apply at 50% of the prescribed concentration or value for PAH: Total. | ||||
(e) The capabilities required apply in relation to prescribed concentration or value in Table B. | ||||
(f) The capabilities required apply in relation to prescribed concentration or value in Table C. | ||||
In this Schedule “Pesticide”, “PAH: Total” and “THM: Total” have the meanings given in Schedule 1. | ||||
1. | Aluminium | 10 | 10 | 10 |
2. | Ammonium | 10 | 10 | 10 |
3. | Antimony | 25 | 25 | 25 |
4. | Arsenic | 10 | 10 | 10 |
5. | Benzene | 25 | 25 | 25 |
6. | Benzo(a)pyrene | 25 | 25 | 25 |
7. | Boron | 10 | 10 | 10 |
8. | Bromate | 25 | 25 | 25 |
9. | Cadmium | 10 | 10 | 10 |
10. | Chloride | 10 | 10 | 10 |
11. | Chromium | 10 | 10 | 10 |
12. | Colour | 10 | 10 | 10 |
13. | Conductivity | 10 | 10 | 10 |
14. | Copper | 10 | 10 | 10 |
15. | Cyanide(a) | 10 | 10 | 10 |
16. | 1,2-dichloroethane | 25 | 25 | 10 |
17. | Fluoride | 10 | 10 | 10 |
18. | Iron | 10 | 10 | 10 |
19. | Lead | 10 | 10 | 10 |
20. | Manganese | 10 | 10 | 10 |
21. | Mercury | 20 | 10 | 20 |
22. | Nickel | 10 | 10 | 10 |
23. | Nitrate | 10 | 10 | 10 |
24. | Nitrite | 10 | 10 | 10 |
25. | Pesticide(b) | 25 | 25 | 25 |
26. | PAH: Total(c) | 25 | 25 | 25 |
27. | Selenium | 10 | 10 | 10 |
28. | Sodium | 10 | 10 | 10 |
29. | Sulphate | 10 | 10 | 10 |
30. | Tetrachloroethene(d) | 25 | 25 | 10 |
31. | Tetrachloromethane | 20 | 20 | 20 |
32. | Trichloroethene(d) | 25 | 25 | 10 |
33. | THM: Total(c) | 25 | 25 | 10 |
34. | Turbidity(e) | 10 | 10 | 10 |
35. | Turbidity(f) | 25 | 25 | 25 |
This table specifies the number of samples to be taken at sampling points for the purposes of regulation 9(1)(a) and (2).
This table specifies the number of samples to be taken at supply points for the purposes of regulation 9(1)(b) and (2).
This table specifies the number of samples to be taken at treatment works for the purposes of regulation 11.
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