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The Water Supply (Water Quality) Regulations 2016

Type Statutory-Instrument
Publication 2016-05-26
Last updated 2020-12-31
State In force
Department King's Printer of Acts of Parliament
Source legislation.gov.uk
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articles Not indexed
Reform history JSON API
(1) (2) (3)
Regulations revoked References Extent of revocation
The 2000 Regulations S.I. 2000/3184 The whole Regulations
The Water Supply (Water Quality) (Amendment) Regulations 2001 S.I. 2001/2885 The whole Regulations
The National Health Service Reform and Health Care Professions Act 2002 (Supplementary, Consequential etc. Provisions) Regulations 2002 S.I. 2002/2469 Schedule 1 Part 2 paragraph 91
The Water Act 2003 (Consequential and Supplementary Provisions) Regulations 2005 S.I. 2005/2035 Regulations 3, 10 and 20
The Water Supply (Water Quality) (Amendment) Regulations 2007 S.I. 2007/2734 The whole Regulations
The Legislative and Regulatory Reform (Regulatory Functions) Order 2007 S.I. 2007/3544 The references in Part 2 of the Schedule, under the heading “Water”, to—
(a) the Water Supply (Water Quality) Regulations 2001; and
(b) the Water Supply (Water Quality) (Amendment) Regulations 2001
The Water Supply Regulations 2010 S.I. 2010/991 The whole Regulations
The National Treatment Agency (Abolition) and the Health and Social Care Act 2012 (Consequential, Transitional and Savings Provisions) Order 2013 S.I. 2013/235 Paragraph 43 of Schedule 2
The Construction Products Regulations 2013 S.I. 2013/1387 Paragraph 3 of Schedule 5

Signed

Rory Stewart — Parliamentary Under Secretary of State — 2016-05-26

Explanatory note

(This note is not part of the Regulations)

Footnotes

1

1991 c.56; the functions of the Secretary of State under section 67 were transferred to the National Assembly for Wales (“the Assembly”) (a) for the making of regulations concerning water supplied using the supply system of a water undertaker, in relation to the supply system of any water undertaker whose area is wholly or mainly in Wales, and (b) for the making of regulations concerning water supplied other than using the supply system of a water undertaker, in relation to Wales, by article 2 of, and Schedule 1 to, the National Assembly for Wales (Transfer of Functions) Order 1999 (S.I. 1999/672) (“the Order”); the functions of the Secretary of State under section 69 were, in relation to any water undertaker whose area is wholly or mainly in Wales and any licensed water supplier so far as relating to licensed activities using the supply system of any such water undertaker, transferred to the Assembly by the same provision of the Order; the functions of the Secretary of State under section 77 were transferred to the Assembly in relation to Wales by the same provision of the Order; the functions of the Secretary of State under section 213 were made exercisable by the Assembly to the same extent as the powers to which that section applies were made exercisable by the Assembly by virtue of the same provision of the Order; see the entry in Schedule 1 to the Order. By virtue of paragraph 30 of Schedule 11 to the Government of Wales Act 2006 (c.32), the functions transferred to and made exercisable by the Assembly are now exercisable by the Welsh Ministers. Section 69 was amended by paragraph 19 of Schedule 8, and Part 3 of Schedule 9, to the Water Act 2003 (c.37). It is prospectively amended by paragraph 68 of Schedule 7 to the Water Act 2014 (c.21) from a date to be appointed. Section 213(2) was amended by paragraph 28 of Schedule 1 to the Competition and Service (Utilities) Act 1992 (c.43) and by section 36(2) of, and paragraph 49(3) of Schedule 8 to, the Water Act 2003. It is prospectively amended by paragraph 119(4) of Schedule 7 to the Water Act 2014 from a date to be appointed.

2

1972 c.68; section 2(2) was amended by section 27(1)(a) of the Legislative and Regulatory Reform Act 2006 (c.51) and by Part 1 of the Schedule to the European Union (Amendment) Act 2008 (c.7).

4

type=start slip=2016-06-01 time=1465211273815S.I. 2016/618.type=end slip=2016-06-01 time=1465211273815

5

See section 6 of the Act for the meaning of “water undertaker”.

6

See sections 17A and 219(1) of the Act for the meaning of “licensed water supplier”. This definition is prospectively repealed by paragraph 120 of Schedule 7 to the Water Act 2014 from a date to be appointed.

8

Chapter 1A was inserted by paragraph 2 of Schedule 4 to the Water Act 2003.

11

See section 93(1) of the Act for the meaning of “food production purposes”.

12

Section 17B was inserted by paragraph 2 of Schedule 4 to the Water Act 2003. It is prospectively amended by section 2 of, and paragraph 6 of Schedule 5 and paragraph 10 of Schedule 7 to, the Water Act 2014 from a date to be appointed.

13

Section 68(1) was amended by paragraph 18 of Schedule 8 to the Water Act 2003 (c.37). It is prospectively amended by paragraph 38 of Schedule 5, and paragraphs 66 and 67 of Schedule 7, to the Water Act 2014 (c.21).

14

O.J. No L 327, 22.12.2000, p 1, as last amended by Commission Directive 2014/101/EU (OJ No L 311, 31.10.2014, p 32).

15

Section 18 was amended by sections 36(2) and 49(2) of, and paragraph 4 of Schedule 8 to, the Water Act 2003 (c.37). It is prospectively amended by paragraph 26 of Schedule 7 to the Water Act 2014 (c.21) from a date to be appointed.

17

Section 75 was amended by paragraph 24 of Schedule 8 to the Water Act 2003 and paragraph 72 of Schedule 7 to the Water Act 2014.

18

type=start slip=2016-06-01 time=1465211294893S.I. 2016/618.type=end slip=2016-06-01 time=1465211294893

19

Section 219(1) of the Act defines “the Council” as the Consumer Council for Water.

20

OJ No L 330, 5.12.1998, p 32, as last amended by Commission Directive (EU) 2015/1787 (OJ No L 260, 7.10.2015, p 6).

21

Section 68(3) was amended by paragraph 18(5) of Schedule 8 to the Water Act 2003 (c.37).

22

OJ No L 88, 4.4.2011, p 5, as last amended by Commission Delegated Regulation (EU) No 574/2014 (OJ No L 159, 28.5.2014, p 41).

23

OJ No L 241, 17.9.2015, p 1.

24

Section 18 was amended by sections 36(2) and 49(2) of, and paragraph 4 of Schedule 8 to, the Water Act 2003 (c.37). It is prospectively amended by paragraph 26 of Schedule 7 to the Water Act 2014 (c.21) from a date to be appointed.

25

Section 219(1) of the Act defines “the Authority” as the Water Services Regulation Authority.

26

OJ No L 330, 5.12.1998, p 32, as last amended by Commission Directive (EU) 2015/1787 (OJ No L 260, 7.10.2015, p 6).

27

OJ No L 296, 7.11.2013, p 12.

29

Where appropriate gross beta activity may be replaced by residual beta activity after subtraction of the K-40 activity concentration.

30

OJ No L 159, 29.6.1996, p 1, which is prospectively repealed by Council Directive 2013/59/Euratom (OJ No L 13, 17.1.2014, p 1) from 6th February 2018.

31

There are amendments not relevant to these Regulations.

32

Amended by S.I. 2007/2734.

33

There are amendments not relevant to these Regulations.

34

Amended by S.I. 2007/2734.

35

Amended by S.I. 2013/1387.

36

type=start slip=2016-06-01 time=1465211315831Amended by S.I. 2016/618.type=end slip=2016-06-01 time=1465211315831

37

There are amendments not relevant to these Regulations.

For “Water Supply (Water Quality) Regulations 2000” substitute “ Water Supply (Water Quality) Regulations 2016 ”

Editorial notes

38

1991 c.56; the functions of the Secretary of State under section 67 were transferred to the National Assembly for Wales (“the Assembly”) (a) for the making of regulations concerning water supplied using the supply system of a water undertaker, in relation to the supply system of any water undertaker whose area is wholly or mainly in Wales, and (b) for the making of regulations concerning water supplied other than using the supply system of a water undertaker, in relation to Wales, by article 2 of, and Schedule 1 to, the National Assembly for Wales (Transfer of Functions) Order 1999 (S.I. 1999/672) (“the Order”); the functions of the Secretary of State under section 69 were, in relation to any water undertaker whose area is wholly or mainly in Wales and any licensed water supplier so far as relating to licensed activities using the supply system of any such water undertaker, transferred to the Assembly by the same provision of the Order; the functions of the Secretary of State under section 77 were transferred to the Assembly in relation to Wales by the same provision of the Order; the functions of the Secretary of State under section 213 were made exercisable by the Assembly to the same extent as the powers to which that section applies were made exercisable by the Assembly by virtue of the same provision of the Order; see the entry in Schedule 1 to the Order. By virtue of paragraph 30 of Schedule 11 to the Government of Wales Act 2006 (c.32), the functions transferred to and made exercisable by the Assembly are now exercisable by the Welsh Ministers. Section 69 was amended by paragraph 19 of Schedule 8, and Part 3 of Schedule 9, to the Water Act 2003 (c.37). It is prospectively amended by paragraph 68 of Schedule 7 to the Water Act 2014 (c.21) from a date to be appointed. Section 213(2) was amended by paragraph 28 of Schedule 1 to the Competition and Service (Utilities) Act 1992 (c.43) and by section 36(2) of, and paragraph 49(3) of Schedule 8 to, the Water Act 2003. It is prospectively amended by paragraph 119(4) of Schedule 7 to the Water Act 2014 from a date to be appointed.

39

1972 c.68; section 2(2) was amended by section 27(1)(a) of the Legislative and Regulatory Reform Act 2006 (c.51) and by Part 1 of the Schedule to the European Union (Amendment) Act 2008 (c.7).

42

See section 6 of the Act for the meaning of “water undertaker”.

43

S.I. 2000/3184, as amended by S.I. 2001/2885, 2002/2469, 2005/2035, 2007/2734, 2010/991, 2013/235, 1387.

46

See section 93(1) of the Act for the meaning of “food production purposes”.

47

Section 17B was inserted by paragraph 2 of Schedule 4 to the Water Act 2003. It is prospectively amended by section 2 of, and paragraph 6 of Schedule 5 and paragraph 10 of Schedule 7 to, the Water Act 2014 from a date to be appointed.

48

Section 68(1) was amended by paragraph 18 of Schedule 8 to the Water Act 2003 (c.37). It is prospectively amended by paragraph 38 of Schedule 5, and paragraphs 66 and 67 of Schedule 7, to the Water Act 2014 (c.21).

49

O.J. No L 327, 22.12.2000, p 1, as last amended by Commission Directive 2014/101/EU (OJ No L 311, 31.10.2014, p 32).

50

Section 18 was amended by sections 36(2) and 49(2) of, and paragraph 4 of Schedule 8 to, the Water Act 2003 (c.37). It is prospectively amended by paragraph 26 of Schedule 7 to the Water Act 2014 (c.21) from a date to be appointed.

52

Section 75 was amended by paragraph 24 of Schedule 8 to the Water Act 2003 and paragraph 72 of Schedule 7 to the Water Act 2014.

54

Section 219(1) of the Act defines “the Council” as the Consumer Council for Water.

55

Section 68(3) was amended by paragraph 18(5) of Schedule 8 to the Water Act 2003 (c.37).

56

Section 18 was amended by sections 36(2) and 49(2) of, and paragraph 4 of Schedule 8 to, the Water Act 2003 (c.37). It is prospectively amended by paragraph 26 of Schedule 7 to the Water Act 2014 (c.21) from a date to be appointed.

57

Section 219(1) of the Act defines “the Authority” as the Water Services Regulation Authority.

58

OJ No L 330, 5.12.1998, p 32, as last amended by Commission Directive (EU) 2015/1787 (OJ No L 260, 7.10.2015, p 6).

59

OJ No L 296, 7.11.2013, p 12.

61

Where appropriate gross beta activity may be replaced by residual beta activity after subtraction of the K-40 activity concentration.

62

See sections 17A and 219(1) of the Act for the meaning of “licensed water supplier”. This definition is prospectively repealed by paragraph 120 of Schedule 7 to the Water Act 2014 from a date to be appointed.

63

S.I. 2000/3184, as amended by S.I. 2001/2885, 2002/2469, 2005/2035, 2007/2734, 2010/991, 2013/235, 1387.

64

There are amendments not relevant to these Regulations.

65

Amended by S.I. 2007/2734.

66

There are amendments not relevant to these Regulations.

67

Amended by S.I. 2007/2734.

68

Amended by S.I. 2013/1387.

69

Amended by S.I. 2016/618.

70

There are amendments not relevant to these Regulations.

130

Sch. 5 Table A3 and footnotes inserted (11.7.2018) by The Water Supply (Water Quality) (Amendment) Regulations 2018 (S.I. 2018/706), regs. 1(1), 2(15)(c) (with reg. 3)

PART1 — Group A and Group B parameters

(1) Item number (2) Parameter (3) Circumstances
(1)Sampling for this parameter in water supply zones may be substituted by sampling at supply points. (1)Sampling for this parameter in water supply zones may be substituted by sampling at supply points. (1)Sampling for this parameter in water supply zones may be substituted by sampling at supply points.
1 Aluminium Where used as a water treatment chemical or where the water originates from, or is influenced by, surface waters
2 Ammonium Where chloramination is practised
3 Coliform bacteria In all circumstances
4 Colony counts 22°C In all circumstances
5 Colour In all circumstances
6 Conductivity In all circumstances
7 E. coli In all circumstances
8 Hydrogen ion In all circumstances
9 Iron Where used as a water treatment chemical or where the water originates from, or is influenced by, surface waters
10 Manganese Where the water originates from, or is influenced by, surface waters
11 Nitrate Where chloramination is practised
12 Nitrite Where chloramination is practised
13 Odour In all circumstances
14 Residual disinfectant In all circumstances
15 Taste In all circumstances
16 Turbidity In all circumstances
(1) Item number (2) Parameter (3) Circumstances
--- --- ---
(1)Sampling for these parameters may be within water supply zones (Group B1) or at supply points (Group B2). (1)Sampling for these parameters may be within water supply zones (Group B1) or at supply points (Group B2). (1)Sampling for these parameters may be within water supply zones (Group B1) or at supply points (Group B2).
(2)Monitoring of this parameter in water supply zones is required only where sodium hypochlorite is added after water has left the treatment works. In other circumstances, monitoring is required at supply points (see Group B2). (2)Monitoring of this parameter in water supply zones is required only where sodium hypochlorite is added after water has left the treatment works. In other circumstances, monitoring is required at supply points (see Group B2). (2)Monitoring of this parameter in water supply zones is required only where sodium hypochlorite is added after water has left the treatment works. In other circumstances, monitoring is required at supply points (see Group B2).
(3)To monitor for indicative dose. (3)To monitor for indicative dose. (3)To monitor for indicative dose.
(4)In the event that a single sample is taken in a year, a further sample must be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply. (4)In the event that a single sample is taken in a year, a further sample must be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply. (4)In the event that a single sample is taken in a year, a further sample must be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply.
1 Aluminium Where not used as a water treatment chemical or where the water neither originates from, nor is influenced by, surface waters
2 Ammonium Where chloramination is not practised
3 Antimony In all circumstances
4 Arsenic In all circumstances
5 Benzene In all circumstances
6 Benzo(a)pyrene In all circumstances
7 Boron In all circumstances
8 Bromate In all circumstances
9 Cadmium In all circumstances
10 Chloride In all circumstances
11 Chromium In all circumstances
12 Clostridium perfringens (including spores) In all circumstances
13 Copper In all circumstances
14 Cyanide In all circumstances
15 1, 2 dichloroethane In all circumstances
16 Enterococci In all circumstances
17 Fluoride In all circumstances
18 Gross alpha In all circumstances
19 Gross beta In all circumstances
20 Iron Where not used as a water treatment chemical or where the water neither originates from, nor is influenced by, surface waters
21 Lead In all circumstances
22 Manganese Where the water neither originates from, nor is influenced by, surface waters.
23 Mercury In all circumstances
24 Nickel In all circumstances
25 Nitrate Where chloramination is not practised
26 Nitrite Where chloramination is not practised
27 Pesticides and related products In all circumstances
28 Polycyclic aromatic hydrocarbon In all circumstances
29 Radon In all circumstances
30 Selenium In all circumstances
31 Sodium In all circumstances
32 Sulphate In all circumstances
33 Tetrachloroethene In all circumstances
34 Tetrachloromethane In all circumstances
35 Total organic carbon In all circumstances
36 Trichloroethene In all circumstances
37 Trihalomethanes: Total In all circumstances
38 Tritium In all circumstances
(1) Item number (2) Parameter (3) Circumstances
--- --- ---
(1)Sampling for these parameters may be within water supply zones (Group B1) or at supply points (Group B2). (1)Sampling for these parameters may be within water supply zones (Group B1) or at supply points (Group B2). (1)Sampling for these parameters may be within water supply zones (Group B1) or at supply points (Group B2).
(2)Monitoring is required at supply points where sodium hypochlorite is not added after water has left the treatment works. In other circumstances, see Group B1. (2)Monitoring is required at supply points where sodium hypochlorite is not added after water has left the treatment works. In other circumstances, see Group B1. (2)Monitoring is required at supply points where sodium hypochlorite is not added after water has left the treatment works. In other circumstances, see Group B1.
(3)To monitor for indicative dose. (3)To monitor for indicative dose. (3)To monitor for indicative dose.
(4)In the event that a single sample is taken in a year, a further sample must be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply. (4)In the event that a single sample is taken in a year, a further sample must be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply. (4)In the event that a single sample is taken in a year, a further sample must be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply.
1 Benzene In all circumstances
2 Boron In all circumstances
3 Bromate In all circumstances
4 Chloride In all circumstances
5 Clostridium perfringens (including spores) ⁽¹⁾ In all circumstances
6 Cyanide In all circumstances
7 1, 2 dichloroethane In all circumstances
8 Fluoride In all circumstances
9 Gross alpha In all circumstances
10 Gross beta In all circumstances
11 Indicative dose ⁽¹⁾ In all circumstances
12 Mercury In all circumstances
13 Nitrite When chloramination is not practised
14 Pesticides and related products In all circumstances
15 Radon In all circumstances
16 Sulphate In all circumstances
17 Tetrachloroethene/Trichloroethene ⁽¹⁾ In all circumstances
18 Tetrachloromethane In all circumstances
19 Total organic carbon In all circumstances
. . . . . . . . .
21 Tritium In all circumstances
(1) Item number (2) Parameter
--- ---
1 Coliform bacteria
2 E. coli
3 Residual disinfectant
(1) Item number (2) Parameter
--- ---
1 Coliform bacteria
2 Colony counts 22°C
3 E. coli
4 Nitrite
5 Residual disinfectant
6 Turbidity
(1) Item number (2) Parameter
--- ---
1 Conductivity
(1) Item number (2) Parameter
--- ---
1 Aluminium
2 Ammonium
3 Colony counts 22°C
4 Colour
5 Conductivity
6 Hydrogen ion
7 Iron
8 Manganese
9 Nitrate
10 Nitrite
11 Odour
12 Taste
13 Turbidity

PART2 — Annual sampling frequencies: water supply zones

Annual sampling frequencies for Group A4 parameters: water supply zones

For the purposes of this table, where the population is not an exact multiple of 5,000, the population figure must be rounded up to the nearest multiple of 5,000.

For the purposes of this table, where the population is not an exact multiple of 5,000, the population figure must be rounded up to the nearest multiple of 5,000.

(1) Estimated population of water supply zone (2) Standard sampling frequency per year
<100 2
100-4,999 4
5,000-9,999 12
10,000-29,999 24
30,000-49,999 36
50,000-79,999 52
80,000-100,000 76
(1) Estimated population of water supply zone (2) Standard sampling frequency per year
--- ---
<100 1
100-4,999 4
5000-100,000 8
(1) Estimated population of water supply zone (2) Standard sampling frequency per year
--- ---
<100 4
≥100 12 per 5,000 population

PART3 — Annual sampling frequencies: treatment works and supply points

Annual sampling frequencies for Group A2 parameters: treatment works or supply points

This table and each table which follows it in this Part set out the annual sampling frequencies for all the substances and parameters comprising each of the groups to which they correspond at treatment works or supply points, those groups having been outlined in Part 1 of this Schedule. The frequencies are determined according to the volume of water supplied at each treatment works or supply point. The number of samples to be taken is the standard number specified in column 2, unless a notice varying this number has been given under regulation 9.

(1) Volume of water supplied m³/day (2) Standard sampling frequency per year
<20 4
20-1,999 52
2,000-5,999 104
6,000-11,999 208
≥12,000 365
(1) Volume of water supplied m³/day (2) Standard sampling frequency per year
--- ---
<20 2
20-999 4
1,000-1999 12
2,000-5,999 24
6,000-9,999 36
10,000-15,999 52
16,000-32,999 104
33,000-49,999 156
50,000-67,999 208
68,000-84,999 260
85,000-101,999 312
102,000-119,999 365
120,000-241,999 730
242,000-484,999 1,460
485,000-728,999 2,190
(1) Volume of water supplied m³/day (2) Standard sampling frequency per year
--- ---
<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
(1) Parameters (2) Uncertainty of measurement % of the parametric value (except for pH)
--- ---
(1)“Uncertainty of measurement” is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurement, based on the information used. The performance criterion for measurement uncertainty (k = 2) is at least the percentage of the parametric value stated in the table. (1)“Uncertainty of measurement” is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurement, based on the information used. The performance criterion for measurement uncertainty (k = 2) is at least the percentage of the parametric value stated in the table.
(2)If the value of uncertainty of measurement cannot be met, the best available technique must be selected (up to 60% of the parametric value). (2)If the value of uncertainty of measurement cannot be met, the best available technique must be selected (up to 60% of the parametric value).
(3)The method determines total cyanide in all forms. (3)The method determines total cyanide in all forms.
(4)Reference method: European standard EN ISO 8467 entitled “Water quality – Determination of permanganate index (ISO 8467)”. (4)Reference method: European standard EN ISO 8467 entitled “Water quality – Determination of permanganate index (ISO 8467)”.
(5)The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30% can be achieved for several pesticides, higher values up to 80 % may be allowed for a number of pesticides. (5)The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30% can be achieved for several pesticides, higher values up to 80 % may be allowed for a number of pesticides.
(6)The performance characteristics apply to individual substances, specified at 25% of the parametric value in Part I of Table B in Schedule 1. (6)The performance characteristics apply to individual substances, specified at 25% of the parametric value in Part I of Table B in Schedule 1.
(7)The performance characteristics apply to individual substances, specified at 50% of the parametric value in Part I of Table B in Schedule 1. (7)The performance characteristics apply to individual substances, specified at 50% of the parametric value in Part I of Table B in Schedule 1.
(8)The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon (TOC) in accordance with European standard EN 1484 entitled “Water analysis – Guidelines for the determination of total organic carbon and dissolved organic carbon”. (8)The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon (TOC) in accordance with European standard EN 1484 entitled “Water analysis – Guidelines for the determination of total organic carbon and dissolved organic carbon”.
(9)The uncertainty of measurement must be estimated at the level of 1.0 nephelometric turbidity units) in accordance with European standard EN ISO 7027-1 entitled “Water quality – Determination of turbidity – Part 1: Quantitative methods (ISO 7027-1”. (9)The uncertainty of measurement must be estimated at the level of 1.0 nephelometric turbidity units) in accordance with European standard EN ISO 7027-1 entitled “Water quality – Determination of turbidity – Part 1: Quantitative methods (ISO 7027-1”.
Aluminium 25
Ammonium 40
Antimony 40
Arsenic 30
Benzene 40
Benzo(a)pyrene 50
Boron 25
Bromate 40
Cadmium 25
Chloride 15
Chromium 30
Colour 20
Conductivity 20
Copper 25
Cyanide 30
1,2-dichloroethane 40
Fluoride 20
Hydrogen ion concentration pH (expressed in pH units) 0.2
Iron 30
Lead 25
Manganese 30
Mercury 30
Nickel 25
Nitrate 15
Nitrite 20
Oxidisability 50
Pesticides 30
Polycyclic aromatic hydrocarbons 50
Selenium 40
Sodium 15
Sulphate 15
Tetrachloroethene 30
Tetrachloromethane 30
Trichloroethene 40
Trihalomethanes: total 40
Total organic carbon 30
Turbidity 30

Reporting

39A

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