Regulations 2(1), 7, 8, 17-26 and 28
(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 |
(1) Item | (2) Parameters | (3) Concentration or Value (maximum) | (4) Units of Measurement |
---|---|---|---|
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:
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:
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | |||
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 |
(1) Item | (2) Parameters | (3) Concentration or Value (maximum unless otherwise stated)) | (4) Units of Measurement |
---|---|---|---|
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. | |||
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 |
(1) Item | (2) Parameters | (3) Concentration or Value (maximum) or State | (4) Units of Measurement |
---|---|---|---|
Notes: (i) The water should not be aggressive. (ii) Excluding tritium, potassium – 40, radon and radon decay products. | |||
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 |
(1) Item | (2) Parameters | (3) Concentration or Value (maximum) | (4) Units of Measurement |
---|---|---|---|
Notes: (i) The water should not be aggressive. | |||
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 |
Regulations 21-23, 29 and 30
Annual sampling frequency (iv)(v) | ||||
---|---|---|---|---|
Volume of water distributed or produced each day within a supply zone (m3) (ii)(iii) | ||||
(1) Item | (2) Parameter | (3) ≤100 Level 1 | (4) > 100– ≤1000 Level 2 | (5) > 1000 Level 3(i) |
Notes: (i) The sampling frequency (X) shall be determined as X = 4 + (3 for each 1,000 m3/d and part thereof of the total volume). (ii) A supply zone is a geographically defined area within which water intended for human consumption comes from one or more sources and within which water quality may be considered as being approximately uniform. (iii) The volumes are calculated as averages taken over a calendar year or using consumption based on the number of inhabitants, assuming a water consumption rate of 200 l/day/capita. (iv) Values in (brackets) in columns (4) and (5) are reduced sampling frequencies which may be applied if– (a) the values of the results obtained from samples taken during a period of at least two successive years are constant and significantly better than the limits laid down in Schedule 1; and (b) no factor is likely to cause a deterioration of the quality of the water. (v) As far as possible, the number of samples should be distributed equally in time and location and should be representative of the quality of water consumed or available for consumption throughout the year. (vi) Necessary only when used as a flocculant. In all other cases the parameter will be sampled according to the frequency specified for audit monitoring (Table B of Schedule 2). (vii) Necessary only if the water originates from, or is influenced by, surface water. In all other cases the parameter will be sampled according to the frequency specified for audit monitoring (Table B of Schedule 2). (viii) Necessary only when chloramination is used as a disinfectant. In all other cases the parameter will be sampled according to the frequency specified for audit monitoring (Table B of Schedule 2). | ||||
1. | Aluminium (vi) | 1 | 4(2) | X(X/2) |
2. | Ammonium | 1 | 4(2) | X(X/2) |
3. | Clostridium perfringens (vii) (including spores) | 1 | 4 | X |
4. | Coliform bacteria | 1 | 4 | X |
5. | Colony counts | 1 | 4 | X |
6. | Colour | 1 | 4(2) | X(X/2) |
7. | Conductivity | 1 | 4(2) | X(X/2) |
8. | Escherichia coli (E.coli) | 1 | 4 | X |
9. | Hydrogen ion | 1 | (2) | X(X/2) |
10. | Iron (vi) | 1 | 4(2) | X(X/2) |
11. | Nitrite (viii) | 1 | 4(2) | X(X/2) |
12. | Odour | 1 | 4(2) | X(X/2) |
13. | Taste | 1 | 4(2) | X(X/2) |
14. | Turbidity | 1 | 4 | X |
Annual sampling frequency | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Volume of water distributed or produced each day within a supply zone (m3) (ii)(iii) | ||||||||||||
(1) Item | (2) Parameters | (3) ≤100 Level 1 | (4) > 100 – ≤1000 Level 2 | (5) > 1000 Level 3 (i) | ||||||||
Notes: (i) The sampling frequency (Y) shall be determined by–
| ||||||||||||
1. | Acrylamide | 1 | 1 | Y | ||||||||
2. | Aluminium | 1 | 1 | Y | ||||||||
3. | Antimony | 1 | 1 | Y | ||||||||
4. | Arsenic | 1 | 1 | Y | ||||||||
5. | Benzene | 1 | 1 | Y | ||||||||
6. | Benzo(a)pyrene | 1 | 1 | Y | ||||||||
7. | Boron | 1 | 1 | Y | ||||||||
8. | Bromate | 1 | 1 | Y | ||||||||
9. | Cadmium | 1 | 1 | Y | ||||||||
10. | Chloride | 1 | 1 | Y | ||||||||
11. | Chromium | 1 | 1 | Y | ||||||||
12. | Clostridium perfringens (including spores) | 1 | 1 | Y | ||||||||
13. | Copper | 1 | 1 | Y | ||||||||
14. | Cyanide | 1 | 1 | Y | ||||||||
15. | 1,2 dichloroethane | 1 | 1 | Y | ||||||||
16. | Enterococci | 1 | 1 | Y | ||||||||
17. | Epichlorohydrin | 1 | 1 | Y | ||||||||
18. | Fluoride | 1 | 1 | Y | ||||||||
19. | Iron | 1 | 1 | Y | ||||||||
20. | Lead | 1 | 1 | Y | ||||||||
21. | Manganese | 1 | 1 | Y | ||||||||
22. | Mercury | 1 | 1 | Y | ||||||||
23. | Nickel | 1 | 1 | Y | ||||||||
24. | Nitrate | 1 | 1 | Y | ||||||||
25. | Nitrite | 1 | 1 | Y | ||||||||
26. | Pesticides | 1 | 1 | Y | ||||||||
27. | Pesticides – Total | 1 | 1 | Y | ||||||||
28. | Polycyclic Aromatic Hydrocarbons | 1 | 1 | Y | ||||||||
29. | Selenium | 1 | 1 | Y | ||||||||
30. | Silver | 1 | 1 | Y | ||||||||
31. | Sodium | 1 | 1 | Y | ||||||||
32. | Sulphate | 1 | 1 | Y | ||||||||
33. | Tetrachloroethene and Trichloroethene | 1 | 1 | Y | ||||||||
34. | Tetrachloromethane | 1 | 1 | Y | ||||||||
35. | Total indicative dose | 1 | 1 | Y | ||||||||
36. | Total organic carbon | 1 | 1 | Y | ||||||||
37. | Trihalomethanes – Total | 1 | 1 | Y | ||||||||
38. | Tritium | 1 | 1 | Y | ||||||||
39. | Vinyl chloride | 1 | 1 | Y | ||||||||
40. | Zinc | 1 | 1 | Y |
Parameters
1. Coliform bacteria
2. Conductivity
3. Enterococci
4. Escherichia coli (E. coli)
5. Hydrogen ion
6. Lead
7. Nitrate(i)
8. Odour – qualitative(ii)
9. Taste – qualitative(ii)
10. Turbidity
Notes:
(i)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.
(ii)Samples should not be assessed qualitatively if there are reasonable grounds for suspecting that the water may give rise to a health hazard.
Regulation 26
(1) Where a monitoring local authority carries out an investigation in relation to a Type A supply for the purposes of regulation 26, it shall do so in accordance with the provisions of this Schedule and shall take into account the matters specified in Schedule 4.
(2) Where a monitoring local authority considers that one or more of the parameters listed in the Table in this Schedule is not likely to be present in a Type A supply in its area in concentrations which could lead to the risk of a breach of the parametric value in respect of the parameters specified in Table B of Schedule 2, it shall undertake such investigations as are considers reasonable to satisfy itself–
(a)that the circumstances referred to in column 3 of the Table in this Schedule in respect of that parameter do not exist; and
(b)whether any of the conditions referred to in column 4 of the Table in this Schedule in respect of that parameter, apply.
(3) Where a monitoring local authority is satisfied, as a result of its investigations under paragraph (2), that in respect of the supply, one or more of the parameters referred to in column 2 of the Table in this Schedule is not likely to be present in that supply in concentrations which could lead to the risk of a breach of the said parametric value in respect of such parameters, it may make a decision in accordance with regulation 26.
(1) Item No. | (2) Parameter | (3) Circumstances in which parameter is likely to be present | (4) Conditions to be satisfied before a decision may be made |
---|---|---|---|
(1) | Acrylamide |
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(2) | Aluminium |
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(3) | Antimony |
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(4) | Arsenic |
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(5) | Benzene |
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(6) | Benzo(a)pyrene |
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(7) | Boron |
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(8) | Bromate |
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(9) | Cadmium |
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(10) | Chromium |
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(11) | Copper |
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(12) | Cyanide |
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(13) | 1,2 dichloroethane |
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(14) | Epichlorohydrin |
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(15) | Fluoride |
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(16) | Iron |
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(17) | Lead |
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(18) | Manganese |
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(19) | Mercury |
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(20) | Nickel |
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(21) | Nitrate |
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(22) | Nitrite |
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(24) | Pesticides |
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(25) | Pesticides – Total |
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(26) | Polycyclic Aromatic Hydrocarbons (PAH) |
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(27) | Selenium |
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(28) | Silver |
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(29) | Sodium |
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(30) | Sulphate |
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(31) | Tetrachloroethene and Trichloroethene |
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(32) | Tetrachloromethane |
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(33) | Total indicative dose |
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(34) | Trihalomethanes – Total |
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(35) | Tritium |
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(36) | Vinyl chloride |
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(37) | Zinc |
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Regulations 16 and 26 and 27
(1) When undertaking or reviewing and updating a risk assessment for the purposes of regulations 16 and 27, a monitoring local authority shall do so in accordance with the provisions of this Schedule.
(2) A risk assessment shall comprise the following–
(a)documentation on and a description of the private water supply, including the catchment from which the supply draws water;
(b)a hazard assessment and risk characterisation;
(c)an identification of the measures by which risks may be controlled; and
(d)establishment of verification procedures,
and for the purposes of this paragraph, “hazard” means a biological, chemical, physical or radiological agent that has the potential to cause harm or danger to human health; and “risk” means the likelihood of identified hazards causing harm in exposed populations in a specified time, including the magnitude of that harm and/or the consequences of such harm.
(3) In respect of a private water supply which comprises, either alone or in any combination thereof, catchments, surface water or ground water, the risk assessment shall include provision in relation to the relevant matters specified in Table A of this Schedule.
(4) In respect of a private water supply which receives treatment, including treatment at source and at any point thereafter, the risk assessment shall make provision in relation to the relevant matters specified in Table B of this Schedule.
(5) In respect of a private water supply which comprises intermediate tanks and distribution, the risk assessment shall include provision in relation to the relevant matters specified in Table C of this Schedule.
(1) Source of private water supply | (2) Information to be considered in the risk assessment |
---|---|
(1) Catchments | (i) geology and hydrology (ii) meteorology and weather patterns (iii) general catchment and river health (iv) wildlife (v) competing water uses (vi) nature and intensity of development and land use (vii) other activities in the catchment that potentially release contaminants into source water (viii) planned future activities |
(2) Surface water | (i) description of water body type (e.g. river, reservoir, dam) (ii) flow and reliability of source water (iii) retention times (iv) water constituents (physical, chemical, microbial) (v) protection (e.g. enclosures, access) (vi) recreational and other human activity (vii) bulk water transport |
(3) Groundwater | (i) confined or unconfined aquifer (ii) aquifer hydrogeology (iii) flow rate and direction (iv) dilution characteristics (v) recharge area (vi) wellhead protection (vii) depth of casing (viii) bulk water transport |
(i) treatment processes (ii) equipment design (iii) monitoring equipment and automation (iv) water treatment chemicals used (v) treatment efficiencies (vi) disinfection removals of pathogens (vii) disinfection residuals/contact time (viii)
|
(i) reservoir/tank design (ii) retention times (iii) seasonal variations (iv) protection (e.g. covers, enclosures, access) (v) distribution system design (vi) hydraulic conditions (e.g. water age, pressures, flows) (vii) backflow protection (viii) disinfectant residuals |
Regulations 22, 29 and 31
(1) Parameter | (2) Method | ||||||||||||||||||||||||||
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(i) The composition of m–CP agar is:
| |||||||||||||||||||||||||||
Clostridium perfringens (including spores) | Membrane filtration followed by anaerobic incubation of the membrane on m–CP agar(i) 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. | ||||||||||||||||||||||||||
Coliform bacteria | ISO 9308–1 | ||||||||||||||||||||||||||
Colony count 22°C – enumeration of culturable micro-organisms | prEN ISO 6222 | ||||||||||||||||||||||||||
Enterococci | ISO 7899–2 | ||||||||||||||||||||||||||
Escherichia coli (E.coli) | ISO 9308–1 |
(1) Item No. | (2) Parameters | (3) Trueness % of prescribed concentration or value or specification | (4) Precision % of prescribed concentration or value or specification | (5) Limit of detection % of prescribed concentration or value or specification |
---|---|---|---|---|
Notes: (i) The method of analysis should determine total cyanide in all forms. (ii) The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. (iii) The performance characteristics apply to the individual substances specified at 25% of the parametric value in Table B in Schedule 1. (iv) The performance characteristics apply to the individual substances specified at 50% of the parametric value in Table B in Schedule 1. (v) The performance characteristics apply to the prescribed value of 4NTU. | ||||
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(i) | 10 | 10 | 10 |
16. | 1,2–dichloroethane | 25 | 25 | 25 |
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. | Pesticides and related products(ii) | 25 | 25 | 25 |
26. | Polycyclic aromatic hydrocarbons(iii) | 25 | 25 | 25 |
27. | Selenium | 10 | 10 | 10 |
28. | Sodium | 10 | 10 | 10 |
29. | Sulphate | 10 | 10 | 10 |
30. | Tetrachloroethene(iv) | 25 | 25 | 10 |
31. | Tetrachloromethane | 20 | 20 | 20 |
32. | Trichloroethene(iv) | 25 | 25 | 10 |
33. | Trihalomethanes:Total(iii) | 25 | 25 | 10 |
34. | Turbidity(v) | 10 | 10 | 10 |