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The Water Supply (Water Quality) Regulations 2018

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Regulations 2, 4, 6, 14, 15, 18, 20 and 22

SCHEDULE 1PRESCRIBED CONCENTRATIONS AND VALUES

Table A Microbiological Parameters

Part 1: Directive requirements
ItemParametersConcentration or Value (maximum)Units of MeasurementPoint of compliance
(1)

Compliance required as to 95% of samples from each service reservoir (regulation 4(6)).

1Enterococci0number/100 mlConsumers’ taps
2E.coli0number/100 mlConsumers’ taps
Part 2: National requirements
1Coliform bacteria0number/100 mlService reservoirs (1) and water treatment works
2E. coli0number/100 mlService reservoirs and water treatment works
Note:

Table B Chemical Parameters

Part 1: National requirements

(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 4(2)(d).

(3)

See the definition of “pesticides and related products” in regulation 2.

(4)

The parametric value applies to each individual pesticide.

(5)

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

(6)

The specified compounds are:

  • 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.

(7)

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

(8)

The specified compounds are:

  • 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.

ItemParametersConcentration or Value (maximum)Units of MeasurementPoint of compliance
1Acrylamide0.10μg/l(1)
2Antimony5.0μgSb/lConsumers’ taps
3Arsenic10μgAs/lConsumers’ taps
4Benzene1.0μg/lConsumers’ taps
5Benzo(a)pyrene0.010μg/lConsumers’ taps
6Boron1.0mgB/lConsumers’ taps
7Bromate10μBrO3/lConsumers’ taps
8Cadmium5.0μgCd/lConsumers’ taps
9Chromium50μgCr/lConsumers’ taps
10Copper2.0mgCu/lConsumers’ taps
11Cyanide50μgCN/lConsumers’ taps
121, 2 dichloroethane3.0μg/lConsumers’ taps
13Epichlorohydrin0.10μg/l(1)
14Fluoride1.5mgF/lConsumers’ taps
15Lead10μgPb/lConsumers’ taps
16Mercury1.0μgPb/lConsumers’ taps
17Nickel20μgNi/lConsumers’ taps
18Nitrate (2)50mgNO3/lConsumers’ taps
19Nitrite (2)0.50mgNO2/lConsumers’ taps
0.10Treatment Works
20Pesticides (3),(4)
Aldrin0.030μg/lConsumers’ taps
Dieldrin
Heptachlor
Heptachlor
epoxide
other pesticides0.10μg/lConsumers’ taps
21Pesticides: Total (5)0.50μg/lConsumers’ taps
22Polycyclic aromatic hydrocarbons (6)0.10μg/lConsumers’ taps
23Selenium10μgSe/lConsumers’ taps
24Tetrachloroethene and Trichloroethene (7)10μg/lConsumers’ taps
25Trihalomethanes: Total (8)100μg/lConsumers’ taps
26Vinyl chloride0.50μg/l(1)
Notes:

Part 2: National requirements

ItemParametersConcentration or Value (maximum unless otherwise stated)Units of MeasurementPoint of compliance
1Aluminium200μgAl/lConsumers’ taps
2Colour20mg/l Pt/CoConsumers’ taps
3Iron200μgFe/lConsumers’ taps
4Manganese50μgMn/lConsumers’ taps
5OdourAcceptable to consumers and no abnormal changeConsumers’ taps
6Sodium200mgNa/lConsumers’ taps
7TasteAcceptable to consumers and no abnormal changeConsumers’ taps
8Tetrachlorome-thane3μg/lConsumers’ taps
9Turbidity4NTUConsumers’ taps

Regulations 2, 6, 12, 15 and 19

SCHEDULE 2INDICATOR PARAMETERS

(1)

The water should not be aggressive.

(2)

Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken, monitoring must be carried out to ensure the continued efficacy of the treatment.

(3)

Remedial action may be taken by the Welsh Ministers on radiological protection grounds without further consideration and deemed to be justified where radon concentrates exceed 1,000 Bq/1.

(4)

If tritium concentration exceeds its parametric value, an investigation (which may include analysis) of the presence of artificial radionuclides is required.

(5)

May be monitored from samples of water leaving treatment works or other supply point, as no significant change during distribution.

Item ParametersSpecificationConcentration or Value (maximum unless otherwise stated) or StateUnits of MeasurementPoint of compliance
1Ammonium0.50μgAl/lConsumers’ taps
2Chloride (1)250mgCl/lSupply point (5)
3Clostridium perfringens (including spores)0Number/100 mlSupply point (5)
4Coliform bacteria0Number/100 mlConsumers’ taps
5Colony countsNo abnormal changeNumber/1 ml at 22°CConsumers’ taps, service reservoirs and treatment works
6Conductivity (1)2500μS/cm at 20°CSupply point (5)
7Hydrogen ion9.5pHvalueConsumers’ taps
6.5 (minimum)
8Indicative dose (2)0.10mSvSupply point (5)
(a) gross alpha0.1Bq/lSupply point (5)
(b) gross beta1Bq/lSupply point (5)
9Radon (3)100Bq/lSupply point
10Sulphate 1250mgSO4/lSupply point (5)
11Total organic carbon (TOC)No abnormal changemgC/lSupply point
12Tritium (for radioactivity) (4)100Bq/lSupply point
13Turbidity1NTUTreatment works
Notes:

Regulations 2, 6, 8 and 9

SCHEDULE 3MONITORING

Part 1Group A and Group B Parameters

Table 1

Group A parameters and circumstances for monitoring

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

Sampling for this parameter in water supply zones may be substituted by sampling at supply points.

1AluminiumWhere used as a water treatment chemical or where the water originates from, or is influenced by, surface waters
2AmmoniumWhere chloramination is practised
3Coliform bacteriaIn all circumstances
4Colony counts 22 ° CIn all circumstances
5ColourIn all circumstances
6Conductivity(1)In all circumstances
7E. coliIn all circumstances
8Hydrogen ionIn all circumstances
9IronWhere used as a water treatment chemical or where the water originates from, or is influenced by, surface waters
10ManganeseWhere the water originates from, or is influenced by, surface waters
11NitrateWhere chloramination is practised
12NitriteWhere chloramination is practised
13OdourIn all circumstances
14Residual disinfectantIn all circumstances
15TasteIn all circumstances
16TurbidityIn all circumstances
Note:

Table 2

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

Item numberParameter (2)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.

1Aluminium

Where—

(i) not used as a water treatment chemical; or

(ii) the water neither originates from, nor is influenced by, surface waters.

2AmmoniumWhere chloramination is not practised
3AntimonyIn all circumstances
4ArsenicIn all circumstances
5Benzene (1)In all circumstances
6Benzo(a)pyreneIn all circumstances
7Boron (1)In all circumstances
8Bromate (2)In all circumstances
9CadmiumIn all circumstances
10Chloride (1)In all circumstances
11ChromiumIn all circumstances
12Clostridium perfringens (including spores)In all circumstances
13CopperIn all circumstances
14Cyanide (1)In all circumstances
151, 2 dichloroethane (1)In all circumstances
16EnterococciIn all circumstances
17Fluoride (1)In all circumstances
18Gross alpha (1) (3) (4)In all circumstances
19Gross beta (1) (3) (4)In all circumstances
20Iron

Where—

(i) not used as a flocculant; or

(ii) the water neither originates from, nor is influenced by, surface waters.

21LeadIn all circumstances
22ManganeseWhere the water neither originates from, nor is influenced by, surface waters.
23Mercury (1)In all circumstances
24NickelIn all circumstances
25NitrateWhere chloramination is not practised.
26NitriteWhere chloramination is not practised.
27Pesticides and related products (1)In all circumstances
28Polycyclic aromatic hydrocarbonIn all circumstances
29Radon (1) (4)In all circumstances
30SeleniumIn all circumstances
31SodiumIn all circumstances
32Sulphate (1)In all circumstances
33Tetrachloroethene (1)In all circumstances
34Tetrachloromethane (1)In all circumstances
Total organic carbon (1)
35TrichloroetheneIn all circumstances
Trihalomethanes: Total
36Tritium (1) (4)In all circumstances
Notes:

Table 3

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

Item numberParameter (2)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.

1Benzene (1)In all circumstances
2Boron (1)In all circumstances
3Bromate (2)In all circumstances
4Chloride (1)In all circumstances
5Clostridium perfringens (including spores)In all circumstances
6Cyanide (1)In all circumstances
71, 2 dichloroethane (1)In all circumstances
8Fluoride (1)In all circumstances
9Gross alpha (1) (3) (4)In all circumstances
10Gross beta (1) (3) (4)In all circumstances
11Indicative doseIn all circumstances
12Mercury (1)In all circumstances
13NitriteWhen chloramination is not practised.
14Pesticides and related products (1)In all circumstances
15Radon (1) (4)In all circumstances
16Sulphate (1)In all circumstances
17Tetrachloroethene (1)In all circumstances
18Tetrachloromethane (1)In all circumstances
19Total organic carbon (1)
20TrichloroetheneIn all circumstances
21Tritium (1) (4)In all circumstances
Notes:

Table 4

Group A1 parameters

Item numberParameter
1Coliform bacteria
2E. coli
3Residual disinfectant

Table 5

Group A2 parameters

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

Table 6

Group A3 parameters

Item numberParameter
1Conductivity

Table 7

Group A4 parameters

Item numberParameter
1Aluminium
2Ammonium
3Colony counts 22° C
4Colour
5Conductivity
6Hydrogen ion
7Iron
8Manganese
9Nitrate
10Nitrite
11Odour
12Taste
13Turbidity

PART 2Annual sampling frequencies: water supply zones

Table 8

Annual sampling frequencies for Group A4 parameters: water supply zones

Note:

This table and each table which follows it in this Part set out the annual sampling frequencies for all the substances and parameters comprising each of the groups to which they correspond, those groups having been outlined in Part 1 of this Schedule. These are determined for each water supply zone according to its estimated population (as specified in column one of each table in this Part). The number of samples to be taken is the standard number specified in column 2, unless a notice varying this number has been given under regulation 9.

Estimated population of water supply zoneStandard sampling frequency per year
<1002
100-4,9994
5,000—9,99912
10,000-29,99924
30,000-49,99936
50,000-79,99952
80,000-100,00076

Table 9

Annual sampling frequencies for Group B1 parameters: water supply zones

Estimated population of water supply zoneStandard sampling frequency per year
<1001
100-4,9994
5,000-100,0008

Table 10

Annual sampling frequencies for Group A1: water supply zones

Estimated population of water supply zoneStandard sampling frequency per year
<1004
≥10012 per 5,000 population

Note:

For the purposes of this Table, where the population is not an exact multiple of 5,000, the population figure must be rounded up to the nearest multiple of 5,000.

PART 3Annual sampling frequencies: treatment works and supply points

Table 11

Annual sampling frequencies for Group A2 parameters: treatment works or supply points

Note: This table and each table which follows it in this Part set out the annual sampling frequencies for all the substances and parameters comprising each of the groups to which they correspond at treatment works or supply points, those groups having been outlined in Part 1 of this Schedule. The frequencies are determined according to the volume of water supplied at each treatment works or supply point. The number of samples to be taken is the standard number specified in column 2, unless a notice varying this number has been issued under regulation 9.

Volume of water supplied m 3/dayStandard sampling frequency per year
<204
20-1,99952
2,000-5,999104
6,000-11,999208
≥12,000365

Table 12

Annual sampling frequencies for Group A3 parameters: treatment works or supply points

Volume of water supplied m 3/dayStandard sampling frequency per year
<202
20-9994
1,000-199912
2,000-5,99924
6,000-9,99936
10,000-15,99952
16,000-32,999104
33,000-49,999156
50,000-67,999208
68,000-84,999260
85,000-101,999312
102,000-119,999365
120,000-241,999730
242,000-484,9991,460
485,000-728,9992,190

Table 13

Annual sampling frequencies for Group B2 parameters: treatment works or supply points

Volume of water supplied m 3/dayStandard sampling frequency per year
<201
20-9994
1,000-49,9998
50,000-89,99912
90,000-299,99924
300,000-649,99936
≥650,00048

Regulation 6

SCHEDULE 4Monitoring for indicative dose and analytical performance characteristics

Monitoring for compliance with the indicative dose

1.—(1) A water undertaker may use reliable screening strategies to indicate the presence of radioactivity in water intended for human consumption.

(2) The strategies may include screening for–

(a)certain radionuclides or individual radionuclide; or

(b)gross alpha activity or gross beta activity (where appropriate gross beta activity may be replaced by residual beta activity after subtraction of the K-40 activity concentration).

Screening for certain radionuclides, or screening for an individual radionuclide

2.—(1) If one of the activity concentrations exceeds 20% of the corresponding derived value or the tritium concentration exceeds its parametric value listed in Schedule 2 an analysis of additional radionuclides is required.

(2) In deciding which radionuclides are required to be measured for each supply, a water undertaker must take into account all relevant information about likely sources of radioactivity.

Screening strategies for gross alpha activity and gross beta activity

3.—(1) A water undertaker may use a screening strategy for gross alpha and gross beta to monitor for the parametric indicator value for indicative dose.

(2) Subject to sub-paragraph (3) the recommended screening values are—

(a)0,1Bq/l for gross alpha activity; and

(b)1,0Bq/l for gross beta activity(1).

(3) If the gross alpha activity exceeds 0,1Bq/l or the gross beta activity exceeds 1,0Bq/l, analysis for specific radionuclides is required.

(4) The Welsh Ministers may set alternative screening levels for gross alpha activity and gross beta activity where it can be demonstrated by the water undertaker that the alternative levels are in compliance with an indicative dose of 0,1 mSv.

(5) The radionuclides to be measured must be based on all relevant information about likely sources of radioactivity.

Calculation of the indicative dose

4.—(1) The indicative dose must be calculated from—

(a)the measured radionuclide concentrations and the dose coefficients referred to as “standard values and relationships” in Article 13, and recommended for the estimation of doses from internal exposure in the definition of “standard values and relationships” in Article 4(96), of Council Directive 2013/59/Euratom laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation(2);or

(b)more recent information recognised by the Welsh Ministers, on the basis of the annual intake of water (730 l for adults).

(2) Where the following formula is satisfied, it can be assumed that the indicative dose is less than the parametric value of 0,1 mSv and no further investigation is required—

where—

  • Ci(obs)” means observed concentration of radionuclide I;

  • Ci(der)” means derived concentration of radionuclide i;

  • n” means number of radionuclides detected.

Table 1

Derived concentrations for radioactivity in water intended for human consumption

This table includes values for the most common natural and artificial radionuclides: these are precise values, calculated for a dose of 0.1 mSy, an annual intake of 730 litres and using the dose coefficients referred to as “standard values and relationships” in Article 13, and recommended for the estimation of doses from internal exposure in the definition of “standard values and relationships” in Article 4(96), of Council Directive 2013/59/Euratom. Derived concentrations for other radionuclides can be calculated on the same basis, and values can be updated on the basis of more recent information recognised by the Welsh Ministers.

OriginNuclideDerived concentration
(a)

This table allows only for the radiological properties of uranium, not for its chemical toxicity.

NaturalU-238 (a)3,0 Bq/1
U-234 (a)2,8 Bq/1
Ra-2260,5 Bq/1
Ra-228Ra-228
Pb-2100,2 Bq/1
Po-2100,1 Bq/1
ArtificialC-14240 Bq/1
Sr-904,9 Bq/1
Pu-239/Pu-2400,6 Bq/1
Am-2410,7 Bq/1
Co-6040 Bq/1
Cs-1347,2 Bq/1
Cs-13711 Bq/1
1-1316,2 Bq/1

Performance characteristics and methods of analysis

For the following parameters and radionuclides, the method of analysis used must, as a minimum, be capable of measuring activity concentrations with a limit of detection specified below:

Parameters and radionuclidesLimit of detection (Notes (1),(2))Notes
(1)

The limit of detection must be calculated according to the ISO standard 11929: Determination of the characteristic limits (decision threshold, detection limit, and limits of confidence interval) for measurements of ionising radiation – Fundamentals and application, with probabilities of errors of 1st and 2nd kind of 0,05 each.

(2)

Measurement uncertainties must be calculated and reported as complete standard uncertainties, or as expanded uncertainties with an expansion factor of 1,96 according the ISO Guide for the Expression of Uncertainty in Measurement.

(3)

The limit of detection for tritium and for radon is 10% of its parametric value of 100 Bq/1.

(4)

The limit of detection for gross alpha activity and gross beta activities are 40% of the screening values of 0,1 and 1,0 Bq/1 respectively.

(5)

This limit of detection applies only to initial screening for indicative dose for a new water source; if initial checking indicates that it is not plausible that Ra-228 exceeds 20% of the derived concentration, the limit of detection may be increased to 0,08 Bq/1 for routine Ra-228 nuclide specific measurements, until a subsequent re-check is required.

Tritium10 Bq/1Note (3)
Radon10 Bq/1Note (3)
gross alpha0,04 Bq/1Note (4)
gross beta0,4 Bq/1Note (4)
U-2380,02 Bq/1
U-2340,02 Bq/1
Ra-2260,04 Bq/1
Ra-2280,02 Bq/1Note (5)
Pb-2100,02 Bq/1
Po-2100,01 Bq/1
C-1420 Bq/1
Sr-900,4 Bq/1
Pu-239/Pu-2400,04 Bq/1
Am-2410,06 Bq/1
Co-600,5 Bq/1
Cs-1340,5 Bq/1
Cs-1370,5 Bq/1
I-1310,5 Bq/1
Notes:

Regulations 15 and 16

SCHEDULE 5ANALYTICAL METHODOLOGY

Table A1

Parameters for which, subject to Regulation 15(7), methods of analysis are specified

(1)

Parameter

(2)

Method of analysis

E. coli and coliform bacteriaEN ISO 9308-1(3) or EN ISO 9308-2(4)
EnterococciEN ISO 7899-2(5)
Pseudomonas aeruginosaEN ISO 16266(6)

Enumeration of culturable microorganisms

– colony count 22°c

EN ISO 6222(7)

Enumeration of culturable microorganisms

– colony count 36°c

EN ISO 6222
Clostridium perfringens including sporesEN ISO 14189(8)

Table A2

Parameters in relation to which methods of analysis must satisfy prescribed characteristics

(1)

Parameters

(2)

Trueness % of prescribed concentration or value or specification

(3)

Precision % of prescribed concentration or value or specification

(4)

Limit of detection % of prescribed concentration or value or specification

(1)

The method of analysis should determine total cyanide in all forms.

(2)

The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned.

(3)

The performance characteristics apply to the individual substances specified at 25% of the parametric value in Part 1 of Table B in Schedule 1.

(4)

The performance characteristics apply to the individual substances specified at 50% of the parametric value in Part 1 of Table B in Schedule 1.

(5)

The performance characteristics apply to the prescribed value of 4NTU.

(6)

The performance characteristics apply to the specification of 1NTU for water leaving treatment works.

Aluminium101010
Ammonium101010
Antimony252525
Arsenic101010
Benzene252525
Benzo(a)pyrene252525
Boron101010
Bromate252525
Cadmium101010
Chloride101010
Chromium101010
Colour101010
Conductivity101010
Copper101010
Cyanide (1)101010
1,2-dichloroethane252510
Fluoride101010
Hydrogen ion concentration pH (expressed in pH units)0.20.2
Iron101010
Lead101010
Manganese101010
Mercury201020
Nickel101010
Nitrate101010
Nitrite101010
Pesticides and related products (2)252525
Polycyclic aromatic hydrocarbons (3)252525
Selenium101010
Sodium101010
Sulphate101010
Tetrachloromethane202510
Trichloroethene (4)252510
Trihalomethanes:252510
Total (3)
Turbidity (5)101010
Turbidity (6)252525
Notes:

Table A3

Minimum performance characteristic “uncertainty of measurement”

The uncertainty of measurement laid down in this table must not be used as an additional tolerance to the parametric values set out in Schedules 1 and 2.

(1)

Parameter

(2)

Uncertainty of measurement % of the parametric value (except for pH) (1)

(1)

“Uncertainty of measurement” is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurement, based on the information used. The performance criterion for measurement uncertainty (k = 2) is at least the percentage of the parametric value stated in the table. If the value of uncertainty of measurement cannot be met, the best available technique must be selected (up to 60 % of the parametric value).

(2)

The method determines total cyanide in all forms.

(3)

Reference method: European standard EN ISO 8467 entitled “Water quality - Determination of permanganate index (ISO 8467)”(9).

(4)

The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30% can be achieved for several pesticides, higher values up to 80% may be allowed for a number of pesticides.

(5)

The performance characteristics apply to individual substances, specified at 25% of the parametric value in Part 1 of Table B in Schedule 1.

(6)

The performance characteristics apply to individual substances, specified at 50 % of the parametric value in Part 1 of Table B in Schedule 1.

(7)

The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon (TOC) in accordance with European standard EN 1484 entitled “Water analysis - Guidelines for the determination of total organic carbon and dissolved organic carbon”(10) and dissolved organic carbon (DOC) shall be used.

(8)

The uncertainty of measurement must be estimated at the level of 1,0 NTU in accordance with European standard EN ISO 7027-1 entitled “Water quality - Determination of turbidity - Part 1: Quantitative methods (ISO 7027-1”(11).

Aluminium25
Ammonium40
Antimony40
Arsenic30
Benzene40
Benzo(a)pyrene (2)50
Boron25
Bromate40
Cadmium25
Chloride15
Chromium30
Colour20
Conductivity20
Copper25
Cyanide (3)30
1,2-dichloroethane40
Fluoride20
Hydrogen ion concentration pH (expressed in pH units)0.2
Iron30
Lead25
Manganese30
Mercury30
Nickel25
Nitrate15
Nitrite20
Oxidisability (4)50
Pesticides (5)30
Polycyclic aromatic hydrocarbons (6)50
Selenium40
Sodium15
Sulphate15
Tetrachloroethene (6)30
Tetrachloromethane30
Trichloroethene (7)40
Trihalomethanes: total (6)40
Total organic carbon (8)30
Turbidity 930
Notes:

Regulation 40

SCHEDULE 6Amendments and revocations

Table 1

(1)

Regulations to be amended

(2)

Reference

(3)

Provision to be amended

(4)

Amendments

The Water Quality and Supply (Fees) (Undertakers Wholly or Mainly in Wales) Order 2016S.I. 2016/843 (W. 213)The ScheduleIn the English language text, in each place it occurs, for “Water Supply (Water Quality) Regulations 2010” substitute “Water Supply (Water Quality) Regulations 2018”
In the Welsh language text, in each place it occurs for “Rheoliadau Cyflenwi Dŵr (Ansawdd Dŵr) 2010” substitute Rheoliadau Cyflenwi Dŵr (Ansawdd Dŵr) 2018”

Table 2

(1) Regulations revoked(2) Reference(3) Extent of revocation
The 2010 RegulationsS.I. 2010/994 (W. 99)The whole Regulations
The National Treatment Agency (Abolition) and the Health and Social Care Act 2012 (Consequential, Transitional and Savings Provisions) Order 2013(12)S.I. 2013/235Paragraph 152 of Schedule 2
The Construction Products Regulations 2013S.I. 2013/1387Paragraph 7 of Schedule 5
The Private Water Supplies (Wales) Regulations 2017S.I. 2017/1041 (W. 270)Regulation 25
The Water Act 2014 (Consequential Amendments etc.) Order 2017S.I. 2017/506Article 28
(1)

Where appropriate, gross beta activity may be replaced by residual beta activity after subtraction of the K-40 activity concentration.

(2)

OJ No L 13, 17.1.2014, p.1. For the estimation of doses from internal exposure, Article 4(96) refers to chapter 1 of ICRP (International Commission on Radiological Protection) Publication 119. See Table F.1 in Annex F. A copy of ICRP Publication 119 can be obtained from the ICRP website (www.icrp.org) or from the Welsh Government Water Branch, Welsh Government, Cathays Park, Cardiff, CF10 3NQ.

(3)

This standard entitled “Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 1: Membrane filtration method for waters with low bacterial background flora (ISO 9308-1:2014)” was approved by the European Committee for Standardization (CEN) on 18 January 2017. Under reference BS EN ISO 9308-1:2014+A1:2017, it is published as a UK standard by the British Standards Institution (ISBN 978 0 580 92379 1).

(4)

This standard entitled “Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 2: Most probable number method (ISO 9308-2:2012)” was approved by the European Committee for Standardization (CEN) on 11 April 2014. Under reference BS EN ISO 9308-2:2014, it is published as a UK standard by the British Standards Institution (ISBN 978 0 580 84023 4).

(5)

This standard entitled “Water quality - Detection and enumeration of intestinal enterococci - Part 2: Membrane filtration method (ISO 7899-2:2000)” was approved by the European Committee for Standardization (CEN) on 11 April 2014. Under reference BS EN ISO 7899-2:2000, it is published as a UK standard by the British Standards Institution (ISBN 0 580 34953 5).

(6)

This standard entitled “Water quality - Detection and enumeration of Pseudomonas aeruginosa - Method by membrane filtration (ISO 16266:2006)” was approved by the European Committee for Standardization (CEN) on 11 January 2008. Under reference BS EN ISO 16266:2008, it is published as a UK standard by the British Standards Institution (ISBN 978 0 580 59736 7).

(7)

This standard entitled “Water quality - Enumeration of culturable micro-organisms - Colony count by inoculation in a nutrient agar culture medium (ISO 6222:1999)” was approved by the European Committee for Standardization (CEN) on 16 March 1999. Under reference BS EN ISO 6222:1999, it is published as a UK standard by the British Standards Institution (ISBN 0 580 32495 8).

(8)

This standard entitled Water quality - Enumeration of Clostridium perfringens - Method using membrane filtration (ISO 14189:2013)” was approved by the European Committee for Standardization (CEN) on 15 July 2016. Under reference BS EN ISO 14189:2016, it is published as a UK standard by the British Standards Institution (ISBN 978 0 580 92184 1).

(9)

This standard was approved by the European Committee for Standardization (CEN) on 3 November 1994. Under reference EN ISO 8467:1995, it is published as a UK standard by the British Standards Institution (ISBN 0 580 23435 5).

(10)

This standard was approved by the European Committee for Standardization (CEN) on 6 April 1997. Under reference BS EN 1484:1997, it is published as a UK standard by the British Standards Institution (ISBN 0 580 28372 0).

(11)

This standard was approved by the European Committee for Standardization (CEN) on 15 April 2016. Under reference BS EN ISO 7027-1:2016, it is published as a UK standard by the British Standards Institution (ISBN 978 0 580 81961 2)

(12)

There are amendments not relevant to these Regulations.

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