The Private Water Supplies Regulations 1991

SCHEDULE 1EXERCISE OF POWERS

1.  The powers conferred by sections 67 and 213(2) of the Water Industry Act 1991 are exercised–

(a)to the extent that they relate to the matters specified in section 67(2)(a) to (d), by the Secretary of State for the Environment and the Secretary of State for Wales jointly;

(b)to the extent that they relate to the matters specified in section 67(2)(e), by the Secretary of State for the Environment in relation to water supplied in England and by the Secretary of State for Wales in relation to water supplied in Wales; and

(c)to the extent that they relate to the matter specified in section 67(2)(f), by the Secretary of State for the Environment in relation to local authorities exercising functions in England and by the Secretary of State for Wales in relation to local authorities exercising functions in Wales.

2.  The powers conferred by section 77(3) and (4) of that Act (and section 213(2) to the extent it relates to those subsections) are exercised by the Secretary of State for the Environment in relation to local authorities exercising functions in England and by the Secretary of State for Wales in relation to local authorities exercising functions in Wales.

Regulation 2(1)

SCHEDULE 2PRESCRIBED CONCENTRATIONS OR VALUES

Table A

Item

Parameters

Units of Measurement

Concentration or Value (maximum unless otherwise stated)

Note: (i) If silver is used in a water treatment process, 80 may be substituted for 10.
1.Colourmg/1 Pt/Co scale20
2.Turbidity (including suspended solids)Formazin turbidity units4
3.Odour (including hydrogen sulphide)Dilution number3 at 25°C
4.TasteDilution number3 at 25°C
5.Temperature°C25
6.Hydrogen ionpH value

9.5

5.5 (minimum)

7.Sulphatemg SO4/1250
8.Magnesiummg Mg/150
9.Sodiummg Na/1150
10.Potassiummg K/112
11.Dry residuesmg/11500 (after drying at 180°C)
12.Nitratemg NO3/150
13.Nitritemg NO2/10.1
14.Ammonium (ammonia and ammonium ions)mg NH4/10.5
15.Kjeldahl nitrogenmg N/11
16.Oxidisability (permanganate value)mg O2/15
17.Total organic carbonmg C/1No significant increase over that normally observed
18.Dissolved or emulsified hydrocarbons (after extraction with petroleum ether); mineral oilsμg/110
19.Phenolsμg C6H5OH/10.5
20.Surfactantsμg/1 (as lauryl sulphate)200
21.Aluminiumμg Al/1200
22.Ironμg Fe/1200
23.Manganeseμg Mn/150
24.Copperμg Cu/13000
25.Zincμg Zn/15000
26.Phosphorusμg P/12200
27.Fluorideμg F/11500
28.Silverμg Ag/110(i)

Table B

Item

Parameters

Units of Measurement

Maximum Concentration

Note:

(i)

The sum of the detected concentrations of individual substances.

(ii)

The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3-cd) pyrene.

1.Arsenicμg As/150
2.Cadmiumμg Cd/15
3.Cyanideμg CN/150
4.Chromiumμg Cr/150
5.Mercuryμg Hg/11
6.Nickelμg Ni/150
7.Leadμg Pb/150
8.Antimonyμg Sb/110
9.Seleniumμg Se/110
10.

Pesticides and related products:

(a)

individual substances

μg/10.1

(b)total substances(i)

μg/10.5
11.Polycyclic aromatic hydrocarbons(ii)μg/10.2

Table C

Item

Parameters

Units of Measurement

Maximum Concentration

Note: (i) Analysis by multiple tube method.
1.Total coliformsnumber/100 ml0
2.Faccal coliformsnumber/100 ml0
3.Faccal streptococcinumber/100 ml0
4.Sulphite-reducing clostridianumber/20 ml≤1(i)
5.Colony countsnumber/1 ml at 22°C or 37°CNo significant increase over that normally observed

Table D(i)

Item

Parameters

Units of Measurement

Maximum Concentration or Value

Note: (i) See regulation 3(3)(d).
1.ConductivityμS/cm1500 at 20°C
2.Chloridemg Cl/1400
3.Calciummg Ca/1250
4.Substances extractable in chloroformmg/1 dry residue1
5.Boronμg B/12000
6.Bariumμg Ba/11000
7.Benzo 3,4 pyreneμg/110
8.Tetrachloromethaneμg/13
9.Trichloroetheneμg/130
10.Tetrachlorotheneμg/110

Table E

Item

Parameters

Units of Measurement

Minimum Concentration(i)

Note: (i) See regulation 3(4).
1.Total hardnessmg Ca/160
2.Alkalinitymg HCO3/130

Regulations 14 to 16

SCHEDULE 3SAMPLING FREQUENCIES FOR CLASSES A, B, 1 AND 2

Sampling Frequency (number per annum)

Sampling Frequency (number per annum)

Parameter

Class A and Class 1

Class B and Class 2

Reduced

Standard

Increased

Reduced

Standard

Increased

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Notes:

(i)

Increased or reduced sampling where permitted or required may be confined to the substance in question.

(ii)

The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3-cd) pyrene.

PART I:

Conductivity612244612
Hydrogen ion612244612
Odour (qualitative)612244612
Taste (qualitative)612244612

PART II:

Odour (quantitative)424412
Taste (quantitative)424412
Turbidity424412
Temperature424412
Nitrate424412
Nitrite424412
Ammonium424412
Iron424412
Aluminium424412
Manganese424412
Colour424412

PART III:

Trihalomethanes14121412
Tetrachloromethanes14121412
Trichloroethene14121412
tetrachloroethene14121412
Copper14121412
Lead14121412
Zinc14121412
Pesticides and related prodcts(i)14121412
Polycyclic aromatic hydrocarbons(ii)14121412

PART IV:

Chloride112112
Sulphate112112
Calcium112112
Magnesium112112
Sodium112112
Potassium112112
Dry residues112112
Ozidizability (permanganatge value)112112
Total organic carbon112112
Boron112112
Surfactants112112
Phosphorus112112
Fluoride112112
Barium112112
Silver112112
Arsenic112112
Cadmium112112
Cyanide112112
Chromium112112
Mercury112112
Nickel112112
Antimony112112
Selenium112112
Total Hardness112112
Alkalinity112112

PART V:

Total coliforms241224
Faecal coliforms241224
Residual disinfectant241224
Colony counts241224

Regulation 18

SCHEDULE 4SAMPLING FOR CLASSES C, D, E, 3, 4 AND 5

PART IFREQUENCY

Number of Samples(1)

Class of Supply

Basic Parameters(2)

Additional Parameters(3)

Coliform Parameters(4)

Notes:

(1)

Samples are to be taken each year except in the case of class E supplies (see note 5). If more than one sample is required, the samples must be taken on separate occasions.

(2)

The basic parameters are listed in column (1) of Part II of this Schedule.

(3)

The additional parameters are listed in column (2) of Part II of this Schedule. The local authority must sample for any additional parameters which they consider should be taken because of the characteristics of the locality or of the supply’s distribution system.

(4)

The coliform parameters are total coliforms and faecal coliforms. Sampling for coliform parameters is additional to the coliform sampling carried out as part of sampling for basic parameters and must be carried out on separate occasions.

(5)

Class E supplies are to be sampled once for basic and additional parameters before 31st December 1994 unless–

(a)

they have been sampled for those parameters during 1990 or 1991; and

(b)

the local authority have reasonable grounds for believing that no change has occurred or is likely to occur which may cause the quality of the supply to deteriorate.

From 1st January 1995 all class E supplies are to be sampled once every 5 years.

(6)

The sampling frequency should be halved if the premises served by the supply are used for not more than six months in the year.

(7)

In 1992, or in the first year in which the supply is used as a class 3 supply, 2 samples must be taken in the first two months of the year and 3 in the remainder of that year.

C111
D11
E(5)11
32(6)2(6)4(6) (7)
42(6)1(6)
51

PART IIPARAMETERS

Basic parameters

Additional Parameters

(1)

(2)

Notes:

(1)

Samples need not be analysed for lead if the local authority are satisfied that lead pipework or solder is not present in the plumbing of the property or that naturally occurring lead is not present in the water.

(2)

Samples need not be analysed for nitrate if the local authority are satisfied that nitrate levels in the locality concerned are below 25 mg NO3/l.

(3)

Samples should not be assessed qualitatively for taste if the person taking the samples has any reason to suspect that the water may give rise to a health hazard.

(4)

The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3-cd) pyrene.

Hydrogen ionOdour (quantitative)ZincFluoride
ConductivityTaste (quantitative)Polycyclic aromatic hydrocarbons(4)Barium
Total coliformsTemperatureSilver
Faecal coliformsNitricChlorideArsenic
Lead (1)AmmoniumSulphateCadmium
Nitrate(2)IronCalciumCyanide
Odour (qualitative)AluminiumMagnesiumChromium
Taste (qualitative)(3)ManganeseSodiumMercury
TurbidityColourPotassiumNickel
TrihalomethanesDry residuesAntimony
TetrachloromethaneOxidazability (permanent value)Selenium
TrichloroetheneTotal hardness
TetrachloroetheneTotl organic carbonAlkalinity
CopperBoronResidual disinfectant
SurfaciantsColony counts
Phosphorus

Regulation 20(1)(b)

SCHEDULE 5

MAXIMUM CHARGES FOR SAMPLING AND ANALYSIS

Class of supply

Parameters sampled and analysed

Maximum charge

A, B, 1, 2Schedule 3:
Part I£20
Part II£40
Part III£270
Part IV£350
Part V£20
All parameters£700
C, D, E, 3, 4, 5Schedule 4:
Basic parameters£40
Additional parameters

Odour (quantitative)

Taste (quantitative)

Temperature

Nitrite

Ammonium

Iron

Aluminium

Manganese

Colour

£30 for all or any of these parameters)

Trihalomethanes

Tetrachloromethane

Trichloroethene

Tetrachloroethene

£50 (for all or any of these parameters)

Copper

Zinc

£15 (for both parameters or either of them)

Polycyclic aromatic hydrocarbons

v

Benzo 3,4 pyrene

£ (for both parameters or either of them)

Chloride

Sulphate

Calcium

Magnesium

Sodium

Potassium

Dry residues

Oxidizability

£40 (for all or any of these parametrs)
Total organic carbon£20
Boron£40
Surfactants£40

Phosphorus

Cyanide

£80 (for both parameters or either of them)

Fluoride

Total hardness

Alkalinity

£20 (for all or any of these parameters)

Barium

Silver

Arsenic

Cadmium

Chromium

Mercury

Nickel

Antimony

Selenium

£100 (for all or any of these parameters)

Residual disinfactant

Colony counts

£15 (for both parameters or either of them)
Coliform parameters£20