Search Legislation

The Water Supply (Water Quality) Regulations 2018

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This is the original version (as it was originally made).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.

Part 1Group A and Group B Parameters

Table 1

Group A parameters and circumstances for monitoring

Item number (1)Parameter (2)Circumstances (3)
(1)

Sampling for this parameter in water supply zones may be substituted by sampling at supply points.

1AluminiumWhere used as a water treatment chemical or where the water originates from, or is influenced by, surface waters
2AmmoniumWhere chloramination is practised
3Coliform bacteriaIn all circumstances
4Colony counts 22 ° CIn all circumstances
5ColourIn all circumstances
6Conductivity(1)In all circumstances
7E. coliIn all circumstances
8Hydrogen ionIn all circumstances
9IronWhere used as a water treatment chemical or where the water originates from, or is influenced by, surface waters
10ManganeseWhere the water originates from, or is influenced by, surface waters
11NitrateWhere chloramination is practised
12NitriteWhere chloramination is practised
13OdourIn all circumstances
14Residual disinfectantIn all circumstances
15TasteIn all circumstances
16TurbidityIn all circumstances
Note:

Table 2

Group B1 parameters and circumstances for monitoring to be used for sampling in water supply zones (or supply points)

Item numberParameter (2)Circumstances
(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.

(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.

1Aluminium

Where—

(i) not used as a water treatment chemical; or

(ii) the water neither originates from, nor is influenced by, surface waters.

2AmmoniumWhere chloramination is not practised
3AntimonyIn all circumstances
4ArsenicIn all circumstances
5Benzene (1)In all circumstances
6Benzo(a)pyreneIn all circumstances
7Boron (1)In all circumstances
8Bromate (2)In all circumstances
9CadmiumIn all circumstances
10Chloride (1)In all circumstances
11ChromiumIn all circumstances
12Clostridium perfringens (including spores)In all circumstances
13CopperIn all circumstances
14Cyanide (1)In all circumstances
151, 2 dichloroethane (1)In all circumstances
16EnterococciIn all circumstances
17Fluoride (1)In all circumstances
18Gross alpha (1) (3) (4)In all circumstances
19Gross beta (1) (3) (4)In all circumstances
20Iron

Where—

(i) not used as a flocculant; or

(ii) the water neither originates from, nor is influenced by, surface waters.

21LeadIn all circumstances
22ManganeseWhere the water neither originates from, nor is influenced by, surface waters.
23Mercury (1)In all circumstances
24NickelIn all circumstances
25NitrateWhere chloramination is not practised.
26NitriteWhere chloramination is not practised.
27Pesticides and related products (1)In all circumstances
28Polycyclic aromatic hydrocarbonIn all circumstances
29Radon (1) (4)In all circumstances
30SeleniumIn all circumstances
31SodiumIn all circumstances
32Sulphate (1)In all circumstances
33Tetrachloroethene (1)In all circumstances
34Tetrachloromethane (1)In all circumstances
Total organic carbon (1)
35TrichloroetheneIn all circumstances
Trihalomethanes: Total
36Tritium (1) (4)In all circumstances
Notes:

Table 3

Group B2 parameters and circumstances for monitoring to be used for sampling at works or supply points

Item numberParameter (2)Circumstances
(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.

(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.

1Benzene (1)In all circumstances
2Boron (1)In all circumstances
3Bromate (2)In all circumstances
4Chloride (1)In all circumstances
5Clostridium perfringens (including spores)In all circumstances
6Cyanide (1)In all circumstances
71, 2 dichloroethane (1)In all circumstances
8Fluoride (1)In all circumstances
9Gross alpha (1) (3) (4)In all circumstances
10Gross beta (1) (3) (4)In all circumstances
11Indicative doseIn all circumstances
12Mercury (1)In all circumstances
13NitriteWhen chloramination is not practised.
14Pesticides and related products (1)In all circumstances
15Radon (1) (4)In all circumstances
16Sulphate (1)In all circumstances
17Tetrachloroethene (1)In all circumstances
18Tetrachloromethane (1)In all circumstances
19Total organic carbon (1)
20TrichloroetheneIn all circumstances
21Tritium (1) (4)In all circumstances
Notes:

Table 4

Group A1 parameters

Item numberParameter
1Coliform bacteria
2E. coli
3Residual disinfectant

Table 5

Group A2 parameters

Item numberParameter
1Coliform bacteria
2Colony counts 22° C
3E.coli
4Nitrite
5Residual disinfectant
6Turbidity

Table 6

Group A3 parameters

Item numberParameter
1Conductivity

Table 7

Group A4 parameters

Item numberParameter
1Aluminium
2Ammonium
3Colony counts 22° C
4Colour
5Conductivity
6Hydrogen ion
7Iron
8Manganese
9Nitrate
10Nitrite
11Odour
12Taste
13Turbidity

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

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