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The Private Water Supplies (Scotland) Regulations 2006

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Table B Chemical parameters

Part I: Directive requirements

(1)

Item

(2)

Parameters

(3)

Concentration or Value (maximum)

(4)

Units of Measurement

Notes:

(i)

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.

(ii)

See the definition of “pesticides and related products” in regulation 2(1). The parametric value applies to each individual pesticide.

(iii)

“Pesticides: Total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring procedure.

(iv)

PAH” means Polycyclic Aromatic Hydrocarbons, the specified compounds being:

  • benzo(b)fluoranthene

  • benzo(k)fluoranthene

  • benzo(ghi)perylene

  • indeno(1,2,3–cd)pyrene.

The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.

(v)

The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.

(vi)

“THM: Total” means total Trihalomethanes, the specified compounds being:

  • chloroform

  • bromoform

  • dibromochloromethane

  • bromodichloromethane.

The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.

1.Acrylamide(i)0.10µg/1
2.Antimony5.0µgSb/l
3.Arsenic10µgAs/l
4.Benzene1.0µg/l
5.Benzo(a)pyrene0.010µg/l
6.Boron1.0mgB/l
7.Bromate10µgBrO3/l
8.Cadmium5.0µgCd/l
9.Chromium50µgCr/l
10.Copper2.0mg Cu/l
11.Cyanide50µgCN/l
12.1,2 dichloroethane3.0µg/l
13.Epichlorohydrin(i)0.10µg/l
14.Fluoride1.5mg F/l
15.Lead

(a)25, from 3/7/06 until 24/12/13

µgPb/l

(b)10, from 25/12/13

µgPb/l
16.Mercury1.0µgHg/l
17.Nickel20µgNi/l
18.Nitrate50mgNO3/l
19.Nitrite0.50mgNO2/l
20.Pesticides(ii)
Aldrin0.030µg/l
Dieldrin0.030µg/l
Heptachlor0.030µg/l
Heptachlor epoxide0.030µg/l
other pesticides0.10µg/l
21.Pesticides: Total(iii)0.50µg/l
22.PAH(iv)0.10µg/l
23.Selenium10µgSe/l
24.Tetrachloroethene & Trichloroethene(v)10µg/l
25.THM: Total(vi)100µg/l
26.Vinyl chloride(i)0.50µg/l

Part II: National requirements

(1)

Item

(2)

Parameters

(3)

Concentration or Value (maximum unless otherwise stated))

(4)

Units of Measurement

Notes:

(i)

If Silver is used in a water treatment process, 80 may be substituted for 10.

(ii)

Every effort should be made to achieve 1 NTU whenever possible.

1.Aluminium200µgA1/1
2.Colour20mg/l Pt/Co
3.Hydrogen ion9.5pH value
6.5 (minimum)
4.Iron200µgFe/l
5.Manganese50µgMn/l
6.Odour3 at 25ºCDilution number
7.Silver(i)10µg Ag/l
8.Sodium200mgNa/l
9.Taste3 at 25ºCDilution number
10.Tetrachloromethane3µg/l
11.Turbidity(ii)4NTU
12.Zinc5000µg Zn/l

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