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The Public Water Supplies (Scotland) Regulations 2014

Draft Legislation:

This is a draft item of legislation. This draft has since been made as a Scottish Statutory Instrument: The Public Water Supplies (Scotland) Regulations 2014 No. 364

Regulation 2(1) and (4)

SCHEDULE 1PRESCRIBED CONCENTRATIONS AND VALUES

This schedule has no associated Policy Notes

TABLE A

MICROBIOLOGICAL PARAMETERS

(1)

Item

(2)

Parameter

(3)

Concentration or

value (maximum)

(4)

Units of

measurement

(5)

Point of

compliance

(a)

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.

(b)

Compliance required as to 95% of samples from each service reservoir (regulation 4(4)).

Part 1
1.Enterococci0Number/100mlConsumer’s tap
2.Escherichia coli0Number/100mlConsumer’s tap
Part 2(a)
3.Coliform bacteria0Number/100mlService reservoir(b)
0Number/100mlTreatment works
4.Escherichia coli0Number/100mlService reservoir
0Number/100mlTreatment works
Notes—

TABLE B

CHEMICAL PARAMETERS

(1)

Item

(2)

Parameter

(3)

Concentration or

value (maximum)

(4)

Units of

measurement

(5)

Point of

compliance

(a)

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.

(b)

See also regulation 6(6).

(c)

See also regulation 4(2)(c).

(d)

The corresponding parametric value applies to each ‘other pesticide’ individually.

(e)

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.

Part 1
1.Acrylamide(a)0.10μg/lConsumer’s tap
2.Antimony5.0μgSb/lConsumer’s tap
3.Arsenic10μgAs/lConsumer’s tap
4.Benzene1.0μg/lConsumer’s tap
5.Benzo(a)pyrene0.010μg/lConsumer’s tap
6.Boron1.0mgB/lConsumer’s tap
7.Bromate10μgBrO3/lConsumer’s tap
8.Cadmium5.0μgCd/lConsumer’s tap
9.Chromium50μgCr/lConsumer’s tap
10.Copper(b)2.0mgCu/lConsumer’s tap
11.Cyanide50μgCN/lConsumer’s tap
12.1,2-dichloroethane3.0μg/lConsumer’s tap
13.Epichlorohydrin(a)0.10μg/lConsumer’s tap
14.Fluoride1.5mgF/lConsumer’s tap
15.Lead(b)10μgPb/lConsumer’s tap
16.Mercury1.0μgHg/lConsumer’s tap
17.Nickel(b)20μgNi/lConsumer’s tap
18.Nitrate(c)50mgNO3/lConsumer’s tap
19.Nitrite(c)0.50mgNO2/lConsumer’s tap
0.10mgNO2/lTreatment works
20.Pesticide—
Aldrin0.030μg/lConsumer’s tap
Dieldrin0.030μg/lConsumer’s tap
Heptachlor0.030μg/lConsumer’s tap
Heptachlor epoxide0.030μg/lConsumer’s tap
Other pesticide(d)0.10μg/lConsumer’s tap
21.Pesticides: Total0.50μg/lConsumer’s tap
22.PAH: Total0.10μg/lConsumer’s tap
23.Selenium10μgSe/lConsumer’s tap
24.Tetrachloroethene and Trichloroethene10μg/lConsumer’s tap
25.THM: Total100μg/lConsumer’s tap
26.Vinyl chloride(a)0.50μg/lConsumer’s tap
Part 2(e)
27.Aluminium200μgAl/lConsumer’s tap
28.Colour20mg/l Pt/CoConsumer’s tap
29.Iron200μgFe/lConsumer’s tap
30.Manganese50μgMn/lConsumer’s tap
31.Sodium200mgNa/lConsumer’s tap
32.Tetrachloromethane3μg/lConsumer’s tap
33.Turbidity4NTUConsumer’s tap
Notes—

TABLE C

INDICATOR PARAMETERS

(1)

Item

(2)

Parameter

(3)

Concentration or

value (maximum)

or state

(4)

Units of

measurement

(5)

Point of

monitoring

(a)

The water should not be aggressive.

(b)

In the event that the use of samples from a point within a water supply zone has not be been authorised for this parameter under regulation 8, the point of monitoring is instead the consumer’s tap.

(c)

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.

(d)

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.

Part 1
1.Ammonium0.50mgNH4/lConsumer’s tap
2.Chloride(a)250mgCl/lSupply point(b)
3.Clostridium perfringens (including spores)0Number/100mlSupply point(b)
4.Coliform bacteria0Number/100mlConsumer’s tap
5.Colony countNo abnormal change

Number/1ml

at 22°C and

at 37°C

Consumer’s tap
Service reservoir(c)
Treatment works(d)
6.ColourAcceptable to consumers and no abnormal changeConsumer’s tap
7.Conductivity(a)2500μS/cm at 20°CSupply point(b)
8.Hydrogen ion9.5pH valueConsumer’s tap
6.5 (minimum)
9.OdourAcceptable to consumers and no abnormal changeConsumer’s tap
10.Sulphate(a)250mgSO4/lSupply point(b)
11.TasteAcceptable to consumers and no abnormal changeConsumer’s tap
12.Total organic carbonNo abnormal changemgC/lSupply point(b)
13.Turbidity1NTUTreatment works
Part 2
14.Indicative dose0.10mSv/yearSupply point(b)
15.Tritium100Bq/lSupply point(b)
Notes—

In this Schedule—

“Indicative dose” means the committed effective dose for one year of ingestion resulting from all the radionuclides (whose presence has been detected in water supplied for human consumption purposes) of natural and artificial origin, but excluding tritium, potassium-40, radon and radon decay products;

“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.

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