SCHEDULE 1PRESCRIBED CONCENTRATIONS AND VALUES
Table AMicrobiological 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 BChemical 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:
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
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. | 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:
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Table CIndicator parameters
(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:
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Table DMicrobiological 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:
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SCHEDULE 2PARAMETERS, MONITORING AND SAMPLING FREQUENCIES
Table ACheck Monitoring: Type A Supplies
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) |
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 |
Notes:
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Table BAudit Monitoring: Type A Supplies
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) | ||||||||
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 | ||||||||
Notes:
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Table CRoutine Monitoring: Type B Supplies
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.
SCHEDULE 3CIRCUMSTANCES AND CONDITIONS TO BE CONSIDERED BY A MONITORING LOCAL AUTHORITY: DECISION ON AUDIT MONITORING
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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SCHEDULE 4REQUIREMENTS FOR RISK ASSESSMENT
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 |
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(2) Surface water |
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(3) Groundwater |
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SCHEDULE 5ANALYTICAL METHODOLOGY
(1) Parameter | (2) Method | ||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | ||||||||||||||||||||||||||
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(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 |
---|---|---|---|---|
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 |
Notes:
|