http://www.legislation.gov.uk/id/uksi/2016/614/schedule/3

F1SCHEDULE 3Monitoring

Annotations:

Amendments (Textual)

Sch. 3 substituted (11.7.2018) by The Water Supply (Water Quality) (Amendment) Regulations 2018 (S.I. 2018/706), regs. 1(1), 2(13)

PART 1Group A and Group B parameters

Table 1Group A parameters and circumstances for monitoring

(1) Item number	(2) Parameter	(3) Circumstances
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) Sampling for this parameter in water supply zones may be substituted by sampling at supply points.

Table 2Group B1 parameters and circumstances for monitoring to be used for sampling in water supply zones (or supply points)

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

Table 3Group B2 parameters and circumstances for monitoring to be used for sampling at works or supply points

(1) Item number	(2) Parameter	(3) Circumstances
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)	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	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	In all circumstances
18	Tetrachloromethane	In all circumstances
19	Total organic carbon	In all circumstances
20	Trichloroethene	In all circumstances
21	Tritium	In all 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.

Table 4Group A1 parameters

(1) Item number	(2) Parameter
1	Coliform bacteria
2	E. coli
3	Residual disinfectant

Table 5Group A2 parameters

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

Table 6Group A3 parameters

(1) Item number	(2) Parameter
1	Conductivity

Table 7Group A4 parameters

(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