Search Legislation

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

What Version

 Help about what version
  • Latest available (Revised)
  • Original (As made)

Status:

This is the original version (as it was originally made). This item of legislation is currently only available in its original format.

Regulation 2(13)

SCHEDULE 2

This schedule has no associated Explanatory Memorandum

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

Table 1:

Parameters and circumstances for check monitoring

ItemParameterCircumstances
1AluminiumWhen used as a flocculant or where the water originates from, or is influenced by, surface waters.
2Ammonium
3Clostridium pefringens (including spores)Where the water originates from, or is influenced by, surface waters.
4Coliform bacteria
5Colony Counts
6Colour
7Conductivity
8Escherichia coli (E.coli)
9Hydrogen ion
10Indicative DoseWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken.
11IronWhen used as a flocculant or where the water originates from, or is influenced by, surface waters.
12ManganeseWhere the water originates from, or is influenced by, surface waters.
13NitrateWhen chloramination is practised
14NitriteWhen chloramination is practised
15Odour
16RadonWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken.
17Taste
18TritiumWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken.
19Turbidity

Table 2

Annual Sampling Frequencies: Water Supply Zones

(1)

Substances and parameters subject to monitoring

(2)

Estimated population of water supply zone

(3)

Reduced

(4)

Standard

(*)

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.

(i)

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.

(ii)

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

(iii)

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.

(iv)

To monitor for indicative dose (for radioactivity).

(v)

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.

Note: This table sets out the annual sampling frequencies for all the substances and parameters in column 1. These are determined for each water supply zone according to its estimated population (column 2). The number of samples is either the standard number in column 4 or the reduced number in column 3 (if one is given). Regulation 9 provides for the circumstances in which the reduced number of samples may be taken.
Subject to check monitoring
E.coli<1004
Coliform bacteria≥10012 per 5,000 population(i)
Residual disinfectant
Aluminium<10012
Ammonium100-4,99924

Clostridium perfringens

(including spores)(*)

5,000-9,999612
Colony Counts10,000-29,9991224
Colour30,000-49,9991836
Conductivity(*)50,000-79,9992652
Hydrogen ion80,000-100,0003876
Iron
Manganese
Nitrate(ii)
Nitrite(ii)
Odour
Taste
Turbidity
Subject to audit monitoring
Aluminium<1001
Antimony100-4,9994
Arsenic5,000-100,0008
Benzene(*)
Benzo(a)pyrene
Boron(*)
Bromate(iii)
Cadmium
Chromium

Clostridium perfringens

(including spores)

Copper
Cyanide(*)
1,2, dichloroethane(*)
Enterococci
Fluoride(*)
Gross Alpha(*) (iv) (v)
Gross Beta(*) (iv) (v)
Iron
Lead
Manganese
Mercury(*)
Nickel
Nitrate(ii)
Nitrite(ii)
Pesticides and related products(*)
Polycyclic aromatic hydrocarbons
Radon(*)
Selenium
Sodium
Trichloroethene/ Tetrachloroethene(*)
Tetrachloromethane(*)
Trihalomethanes
Chloride(*)
Sulphate(*)
Total Organic carbon(*)
Tritium(*)

Table 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

(i)

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

(ii)

Sampling at treatment works when chloramination is practised.

(iia)

Sampling at treatment works when chloramination is not practised.

(iii)

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.

(iv)

To monitor for indicative dose (for radioactivity).

Note 1: Sampling is at treatment works for the substances and parameters shown in column (1) of Table 3 as items (1) to (6) and at supply points for the other substances and parameters, except nitrite subject to footnotes (ii) and (ii)(a) to the Table below.
Note 2: Table 3 sets out the annual sampling frequencies for all of the substances and parameters in column 2 at treatment works or supply points. The frequencies are determined according to the volume of water supplied at each treatment works or supply point (column 3). The number of samples is either the standard number in column 5 or the reduced number in column 4 (if one is given). Regulation 9 provides for the circumstances in which the reduced number of samples may be taken.
1E.coli<20-4
2Coliform bacteria20-1,9991252
3Colony counts2,000-5,99952104
4Nitrite(ii)6,000-11,999104208
5Residual disinfectant≥ 12,000104365
6Turbidity
Subject to check monitoring
7Clostridium perfringens(i)<20-2
8Conductivity20-99924
1,000-1,999612
2,000-5,9991224
6,000-9,9991836
10,000-15,9992652
16,000-32,99952104
33,000-49,99978156
50,000-67,999104208
68,000-84,999130260
85,000-101,999156312
102,000-119,999183365
120,000-241,999365730
242,000-484,9997301,460
485,000-728,9991,0952,190
8AIndicative Dose (for radioactivity)<201
8BGross alpha(iv)20-9994
8CGross beta(iv)1,000-49,9998
8DRadon50,000-89,99912
8ETritium90,000-299,99924
300,000-649,99936
≥ 650,00048
Subject to audit monitoring
9Benzene<201
10Boron20-9994
11Bromate(iii)1,000-49,9998
11AClostridium perfringens (including spores)50,000-89,99912
12Cyanide90,000-299,99924
131,2,dichloroethane300,000-649,99936
14Fluoride≥ 650,00048
15Mercury
16Nitrite(iia)
17Pesticides and related products
18

Trichloroethene/

Tetrachloroethene

19Tetrachloromethane
20Chloride
21Sulphate
22Total Organic Carbon
22aRadon
23Tritium
24Indicative Dose (for radioactivity)
25Gross alpha(iv)
26Gross beta(iv)

Back to top

Options/Help

Print Options

Close

Legislation is available in different versions:

Latest Available (revised):The latest available updated version of the legislation incorporating changes made by subsequent legislation and applied by our editorial team. Changes we have not yet applied to the text, can be found in the ‘Changes to Legislation’ area.

Original (As Enacted or Made):The original version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.

Close

Opening Options

Different options to open legislation in order to view more content on screen at once

Close

Explanatory Memorandum

Explanatory Memorandum sets out a brief statement of the purpose of a Statutory Rule and provides information about its policy objective and policy implications. They aim to make the Statutory Rule accessible to readers who are not legally qualified and accompany any Northern Ireland Statutory Rule or Draft Northern Ireland Statutory Rule laid before the UK Parliament during the suspension of the Northern Ireland Assembly.

Close

More Resources

Access essential accompanying documents and information for this legislation item from this tab. Dependent on the legislation item being viewed this may include:

  • the original print PDF of the as enacted version that was used for the print copy
  • lists of changes made by and/or affecting this legislation item
  • confers power and blanket amendment details
  • all formats of all associated documents
  • correction slips
  • links to related legislation and further information resources
Close

More Resources

Use this menu to access essential accompanying documents and information for this legislation item. Dependent on the legislation item being viewed this may include:

  • the original print PDF of the as made version that was used for the print copy
  • correction slips

Click 'View More' or select 'More Resources' tab for additional information including:

  • lists of changes made by and/or affecting this legislation item
  • confers power and blanket amendment details
  • all formats of all associated documents
  • links to related legislation and further information resources