2015 No. 363

Water And Sewerage

The Water Supply (Water Quality) (Amendment) Regulations (Northern Ireland) 2015 (revoked)F1

Made

Coming into operation

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Annotations:
Amendments (Textual)

Citation, commencement and interpretationF11

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Amendments to the principal RegulationsF12

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Amendments to secondary RegulationsF13

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F1SCHEDULE 1

Regulations 2(12)

F1Table in Schedule 2 of the Water Supply (Water Quality) Regulations (Northern Ireland) 2007 (indicator parameters)

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F1SCHEDULE 2

Regulation 2(13)

F1Tables 1-3 in Schedule 3 of the Water Supply (Water Quality) Regulations (Northern Ireland) 2007

F1Table 1:Parameters and circumstances for check monitoring

Item

Parameter

Circumstances

1

Aluminium

When used as a flocculant or where the water originates from, or is influenced by, surface waters.

2

Ammonium

3

Clostridium pefringens (including spores)

Where the water originates from, or is influenced by, surface waters.

4

Coliform bacteria

5

Colony Counts

6

Colour

7

Conductivity

8

Escherichia coli (E.coli)

9

Hydrogen ion

10

Indicative Dose

Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken.

11

Iron

When used as a flocculant or where the water originates from, or is influenced by, surface waters.

12

Manganese

Where the water originates from, or is influenced by, surface waters.

13

Nitrate

When chloramination is practised

14

Nitrite

When chloramination is practised

15

Odour

16

Radon

Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken.

17

Taste

18

Tritium

Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken.

19

Turbidity

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F1Table 2Annual Sampling Frequencies: Water Supply Zones

(1)Substances and parameters subject to monitoring

(2)Estimated population of water supply zone

(3)Reduced

(4)Standard

Subject to check monitoring

E.coli

<100

4

Coliform bacteria

≥100

12 per 5,000 population2

Residual disinfectant

Aluminium

<100

1

2

Ammonium

100-4,999

2

4

Clostridium perfringens

(including spores)1

5,000-9,999

6

12

Colony Counts

10,000-29,999

12

24

Colour

30,000-49,999

18

36

Conductivity1

50,000-79,999

26

52

Hydrogen ion

80,000-100,000

38

76

Iron

Manganese

Nitrate3

Nitrite3

Odour

Taste

Turbidity

Subject to audit monitoring

Aluminium

<100

1

Antimony

100-4,999

4

Arsenic

5,000-100,000

8

Benzene1

Benzo(a)pyrene

Boron1

Bromate4

Cadmium

Chromium

Clostridium perfringens

(including spores)

Copper

Cyanide1

1,2, dichloroethane1

Enterococci

Fluoride1

Gross Alpha156

Gross Beta156

Iron

Lead

Manganese

Mercury1

Nickel

Nitrate3

Nitrite3

Pesticides and related products1

Polycyclic aromatic hydrocarbons

Radon1

Selenium

Sodium

Trichloroethene/ Tetrachloroethene1

Tetrachloromethane1

Trihalomethanes

Chloride1

Sulphate1

Total Organic carbon1

Tritium1

1 Sampling for these parameters may be within water supply zones or at supply points as specified in Table 3, subject to notes (ii) and below (iii) below.

2 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.

3 Check monitoring in water supply zones is required only where chloramination is practised. In other circumstances audit monitoring is required.

4 Audit monitoring in water supply zones is required only where sodium hypochlorite is added after water has left the treatment works. In other circumstances, audit monitoring is required at supply points.

5 To monitor for indicative dose (for radioactivity).

6 In the event that a single sample is taken in a year, a further sample should be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply.

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F1Table 3:Annual Sampling Frequencies: Treatment Works or Supply Points

(1)Item

(2)Substances and parameters

(3) Volume of water supplied m3/d

(4)Reduced

(5)Standard

1

E.coli

<20

-

4

2

Coliform bacteria

20-1,999

12

52

3

Colony counts

2,000-5,999

52

104

4

Nitrite2

6,000-11,999

104

208

5

Residual disinfectant

≥ 12,000

104

365

6

Turbidity

Subject to check monitoring

7

Clostridium perfringens1

<20

-

2

8

Conductivity

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

8A

Indicative Dose (for radioactivity)

<20

1

8B

Gross alpha5

20-999

4

8C

Gross beta5

1,000-49,999

8

8D

Radon

50,000-89,999

12

8E

Tritium

90,000-299,999

24

300,000-649,999

36

≥ 650,000

48

Subject to audit monitoring

9

Benzene

<20

1

10

Boron

20-999

4

11

Bromate4

1,000-49,999

8

11A

Clostridium perfringens (including spores)

50,000-89,999

12

12

Cyanide

90,000-299,999

24

13

1,2,dichloroethane

300,000-649,999

36

14

Fluoride

≥ 650,000

48

15

Mercury

16

Nitrite3

17

Pesticides and related products

18

Trichloroethene/

Tetrachloroethene

19

Tetrachloromethane

20

Chloride

21

Sulphate

22

Total Organic Carbon

22a

Radon

23

Tritium

24

Indicative Dose (for radioactivity)

25

Gross alpha5

26

Gross beta5

1 Check monitoring is required only in respect of surface waters (see regulation 6(2) and Table 1 in Schedule 3)

2 Sampling at treatment works when chloramination is practised.

3 Sampling at treatment works when chloramination is not practised.

4 Audit monitoring at supply points is required only where sodium hypochlorite is not added after water has left the treatment works. In other circumstances, audit monitoring is required in water supply zones.

5 To monitor for indicative dose (for radioactivity).

F1SCHEDULE 3

Regulation 2(14)

F1Schedule 5 Monitoring for indicative dose and analytical performance characteristics.

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