The Public Water Supplies (Scotland) Regulations 2014

Regulation 2(1) and (4)

SCHEDULE 1 S PRESCRIBED CONCENTRATIONS AND VALUES

TABLE A

MICROBIOLOGICAL PARAMETERS

1 The parametric values in Part 2 are not required to protect human health (since the parametric values in Part 1 are sufficient for that purpose). The values in Part 2 are not therefore set for the purposes of Article 5(3) of the Directive.
2 Compliance required as to 95% of samples from each service reservoir (regulation 4(4)).
(1)Item	(2)Parameter	(3)Concentration orvalue (maximum)	(4)Units ofmeasurement	(5)Point ofcompliance
Part 1
1.	Enterococci	0	Number/100ml	Consumer's tap
2.	Escherichia coli	0	Number/100ml	Consumer's tap
Part 21
3.	Coliform bacteria	0	Number/100ml	Service reservoir2
		0	Number/100ml	Treatment works
4.	Escherichia coli	0	Number/100ml	Service reservoir
		0	Number/100ml	Treatment works
Notes—

TABLE B

CHEMICAL PARAMETERS

1 The parametric value refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water. This is controlled by product specification.
2 See also regulation 6(6).
3 See also regulation 4(2)(c).
4 The corresponding parametric value applies to each ‘other pesticide’ individually.
5 The parametric values in this Part are not required to protect human health (since the parametric values in Part 1 are sufficient for that purpose). The values in Part 2 are not therefore set for the purposes of Article 5(3) of the Directive.
(1)Item	(2)Parameter	(3)Concentration orvalue (maximum)	(4)Units ofmeasurement	(5)Point ofcompliance
Part 1
1.	Acrylamide1	0.10	μg/l	Consumer's tap
2.	Antimony	5.0	μgSb/l	Consumer's tap
3.	Arsenic	10	μgAs/l	Consumer's tap
4.	Benzene	1.0	μg/l	Consumer's tap
5.	Benzo(a)pyrene	0.010	μg/l	Consumer's tap
6.	Boron	1.0	mgB/l	Consumer's tap
7.	Bromate	10	μgBrO3/l	Consumer's tap
8.	Cadmium	5.0	μgCd/l	Consumer's tap
9.	Chromium	50	μgCr/l	Consumer's tap
10.	Copper2	2.0	mgCu/l	Consumer's tap
11.	Cyanide	50	μgCN/l	Consumer's tap
12.	1,2-dichloroethane	3.0	μg/l	Consumer's tap
13.	Epichlorohydrin1	0.10	μg/l	Consumer's tap
14.	Fluoride	1.5	mgF/l	Consumer's tap
15.	Lead2	10	μgPb/l	Consumer's tap
16.	Mercury	1.0	μgHg/l	Consumer's tap
17.	Nickel2	20	μgNi/l	Consumer's tap
18.	Nitrate3	50	mgNO3/l	Consumer's tap
19.	Nitrite3	0.50	mgNO2/l	Consumer's tap
		0.10	mgNO2/l	Treatment works
20.	Pesticide—
	Aldrin	0.030	μg/l	Consumer's tap
	Dieldrin	0.030	μg/l	Consumer's tap
	Heptachlor	0.030	μg/l	Consumer's tap
	Heptachlor epoxide	0.030	μg/l	Consumer's tap
	Other pesticide4	0.10	μg/l	Consumer's tap
21.	Pesticides: Total	0.50	μg/l	Consumer's tap
22.	PAH: Total	0.10	μg/l	Consumer's tap
23.	Selenium	10	μgSe/l	Consumer's tap
24.	Tetrachloroethene and Trichloroethene	10	μg/l	Consumer's tap
25.	THM: Total	100	μg/l	Consumer's tap
26.	Vinyl chloride1	0.50	μg/l	Consumer's tap
Part 25
27.	Aluminium	200	μgAl/l	Consumer's tap
28.	Colour	20	mg/l Pt/Co	Consumer's tap
29.	Iron	200	μgFe/l	Consumer's tap
30.	Manganese	50	μgMn/l	Consumer's tap
31.	Sodium	200	mgNa/l	Consumer's tap
32.	Tetrachloromethane	3	μg/l	Consumer's tap
33.	Turbidity	4	NTU	Consumer's tap
Notes—

TABLE C

INDICATOR PARAMETERS

1 The water should not be aggressive.
2 In the event that the use of samples from a point within a water supply zone has not been authorised for this parameter under regulation 8, the point of monitoring is instead the consumer's tap.
3 This value, in so far as the point of monitoring is a service reservoir, is not set for the purposes of Article 5(3) of the Directive.
4 This value, in so far as the point of monitoring is a treatment works, is not set for the purposes of Article 5(3) of the Directive.
[F1 5 Remedial action is to be deemed justified on radiological protection grounds, without further consideration, where radon concentrations exceed 1,000 Bq/l.]
[F1 6 If the concentration of tritium exceeds this value, an analysis of the presence of other artificial radionuclides must be also carried out by Scottish Water.]
(1)Item	(2)Parameter	(3)Concentration orvalue (maximum)or state	(4)Units ofmeasurement	(5)Point ofmonitoring
Part 1
1.	Ammonium	0.50	mgNH4/l	Consumer's tap
2.	Chloride1	250	mgCl/l	Supply point2
3.	Clostridium perfringens (including spores)	0	Number/100ml	Supply point2
4.	Coliform bacteria	0	Number/100ml	Consumer's tap
5.	Colony count	No abnormal change	Number/1ml at 22°C and at 37°C	Consumer's tap
				Service reservoir3
				Treatment works4
6.	Colour	Acceptable to consumers and no abnormal change		Consumer's tap
7.	Conductivity1	2500	μS/cm at 20°C	Supply point2
8.	Hydrogen ion	9.5	pH value	Consumer's tap
		6.5 (minimum)
9.	Odour	Acceptable to consumers and no abnormal change		Consumer's tap
10.	Sulphate1	250	mgSO4/l	Supply point2
11.	Taste	Acceptable to consumers and no abnormal change		Consumer's tap
12.	Total organic carbon	No abnormal change	mgC/l	Supply point2
13.	Turbidity	1	NTU	Treatment works
Part 2
14.	Indicative dose	0.10	mSvF2 ...	Supply point2
[F3 14A.	Radon5	100	Bq/l	Supply point(b)]
15.	Tritium [F4 (f)]	100	Bq/l	Supply point2
Notes—

Textual Amendments

F1 Words in sch. 1 inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 16(b)

F2 Word in sch. 1 omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 16(a)(i)

F3 Sch. 1 entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 16(a)(ii)

F4 Word in sch. 1 inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 16(a)(iii)

In this Schedule—

F5 ...

“NTU” means Nephelometric Turbidity Unit;

“PAH: Total” means the sum of the concentrations of the following polyaromatic hydrocarbons: benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(ghi)perylene and indeno(1,2,3-cd)pyrene;

“Pesticide” means an organic insecticide, herbicide, fungicide, nematocide, acaricide, algicide, rodenticide, slimicide, molluscicide or related product (including a growth regulator), and includes the relevant metabolites, degradation and reaction products of that pesticide;

“Pesticides: Total” refers to the sum of the concentrations of each pesticide detected and quantified in the monitoring procedure;

“Tetrachloroethene and Trichloroethene” means the sum of the concentrations of tetrachloroethene and trichloroethene; and

“THM: Total” means the sum of the concentrations of the following trihalomethanes: chloroform, bromoform, dibromochloromethane and bromodichloromethane.

Textual Amendments

F5 Words in sch. 1 omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 16(c)