2015 No. 363
The Water Supply (Water Quality) (Amendment) Regulations (Northern Ireland) 2015 (revoked)F1
Made
Coming into operation
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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
F1Table in Schedule 2 of the Water Supply (Water Quality) Regulations (Northern Ireland) 2007 (indicator parameters)
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F1SCHEDULE 2
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).
Regulations revoked (27.10.2017) by The Water Supply (Water Quality) Regulations (Northern Ireland) 2017 (S.R. 2017/212), reg. 1, Sch. 6