Council Directive 98/83/ECShow full title

ANNEX I U.K. PARAMETERS AND PARAMETRIC VALUES

PART A U.K. Microbiological parameters

Parameter	Parametric value(number/100 ml)
Escherichia coli (E. coli)	0
Enterococci	0

The following applies to water offered for sale in bottles or containers:

Parameter	Parametric value
Escherichia coli (E. coli)	0/250 ml
Enterococci	0/250 ml
Pseudomonas aeruginosa	0/250 ml
Colony count 22 °C	100/ml
Colony count 37 °C	20/ml

PART B U.K. Chemical parameters

Parameter	Parametric value	Unit	Notes
Acrylamide	0,1	μg/l	Note 1
Antimony	5,0	μg/l
Arsenic	10	μg/l
Benzene	1,0	μg/l
Benzo(a)pyrene	0,01	μg/l
Boron	1,0	mg/l
Bromate	10	μg/l	Note 2
Cadmium	5,0	μg/l
Chromium	50	μg/l
Copper	2,0	mg/l	Note 3
Cyanide	50	μg/l
1,2-dichloroethane	3,0	μg/l
Epichlorohydrin	0,1	μg/l	Note 1
Fluoride	1,5	mg/l
Lead	10	μg/l	Notes 3 and 4
Mercury	1,0	μg/l
Nickel	20	μg/l	Note 3
Nitrate	50	mg/l	Note 5
Nitrite	0,5	mg/l	Note 5
Pesticides	0,1	μg/l	Notes 6 and 7
Pesticides — Total	0,5	μg/l	Notes 6 and 8
Polycyclic aromatic hydrocarbons	0,1	μg/l	Sum of concentrations of specified compounds; Note 9
Selenium	10	μg/l
Tetrachloroethene and Trichloroethene	10	μg/l	Sum of concentrations of specified parameters
Trihalomethanes — Total	100	μg/l	Sum of concentrations of specified compounds; Note 10
Vinyl chloride	0,5	μg/l	Note 1

Note 1: U.K.

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. U.K.

Note 2: U.K.

Where possible, without compromising disinfection, Member States should strive for a lower value. U.K.

For the water referred to in Article 6(1)(a), (b) and (d), the value must be met, at the latest, 10 calendar years after the entry into force of the Directive. The parametric value for bromate from five years after the entry into force of this Directive until 10 years after its entry into force is 25 μg/l.

Note 3: U.K.

The value applies to a sample of water intended for human consumption obtained by an adequate sampling method(1) at the tap and taken so as to be representative of a weekly average value ingested by consumers. Where appropriate the sampling and monitoring methods must be applied in a harmonised fashion to be drawn up in accordance with Article 7(4). Member States must take account of the occurrence of peak levels that may cause adverse effects on human health. U.K.

Note 4: U.K.

For water referred to in Article 6(1)(a), (b) and (d), the value must be met, at the latest, 15 calendar years after the entry into force of this Directive. The parametric value for lead from five years after the entry into force of this Directive until 15 years after its entry into force is 25 μg/l. U.K.

Member States must ensure that all appropriate measures are taken to reduce the concentration of lead in water intended for human consumption as much as possible during the period needed to achieve compliance with the parametric value.

When implementing the measures to achieve compliance with that value Member States must progressively give priority where lead concentrations in water intended for human consumption are highest.

Note 5: U.K.

Member States must ensure that the condition that [nitrate]/50 + [nitrite]/3 ≤ 1, the square brackets signifying the concentrations in mg/l for nitrate (NO₃) and nitrite (NO₂), is complied with and that the value of 0,10 mg/l for nitrites is complied with ex water treatment works. U.K.

Note 6: U.K.

‘Pesticides’ means: U.K.

• organic insecticides,

• organic herbicides,

• organic fungicides,

• organic nematocides,

• organic acaricides,

• organic algicides,

• organic rodenticides

• organic slimicides,

• related products (inter alia, growth regulators)

and their relevant metabolites, degradation and reaction products.

Only those pesticides which are likely to be present in a given supply need be monitored.

Note 7: U.K.

The parametric value applies to each individual pesticide. In the case of aldrin, dieldrin, heptachlor and heptachlor epoxide the parametric value is 0,030 μg/l. U.K.

Note 8: U.K.

‘Pesticides — Total’ means the sum of all individual pesticides detected and quantified in the monitoring procedure. U.K.

Note 9: U.K.

The specified compounds are: U.K.

• benzo(b)fluoranthene,

• benzo(k)fluoranthene,

• benzo(ghi)perylene,

• indeno(1,2,3-cd)pyrene.

Note 10: U.K.

Where possible, without compromising disinfection, Member States should strive for a lower value. U.K.

The specified compounds are: chloroform, bromoform, dibromochloromethane, bromodichloromethane.

For the water referred to in Article 6(1)(a), (b) and (d), the value must be met, at the latest, 10 calendar years after the entry into force of this Directive. The parametric value for total THMs from five years after the entry into force of this Directive until 10 years after its entry into force is 150 μg/l.

Member States must ensure that all appropriate measures are taken to reduce the concentration of THMs in water intended for human consumption as much as possible during the period needed to achieve compliance with the parametric value.

When implementing the measures to achieve this value, Member States must progressively give priority to those areas where THM concentrations in water intended for human consumption are highest.

PART C U.K. Indicator parameters

Parameter	Parametric value	Unit	Notes
Aluminium	200	μg/l
Ammonium	0,50	mg/l
Chloride	250	mg/l	Note 1
Clostridium perfringens (including spores)	0	number/100 ml	Note 2
Colour	Acceptable to consumers and no abnormal change
Conductivity	2 500	μS cm-1 at 20 °C	Note 1
Hydrogen ion concentration	≥ 6,5 and ≤ 9,5	pH units	Notes 1 and 3
Iron	200	μg/l
Manganese	50	μg/l
Odour	Acceptable to consumers and no abnormal change
Oxidisability	5,0	mg/l O2	Note 4
Sulphate	250	mg/l	Note 1
Sodium	200	mg/l
Taste	Acceptable to consumers and no abnormal change
Colony count 22o	No abnormal change
Coliform bacteria	0	number/100 ml	Note 5
Total organic carbon (TOC)	No abnormal change		Note 6
Turbidity	Acceptable to consumers and no abnormal change		Note 7

RADIOACTIVITY
Parameter	Parametric value	Unit	Notes
Tritium	100	Bq/l	Notes 8 and 10
Total indicative dose	0,10	mSv/year	Notes 9 and 10

Note 1: U.K.

The water should not be aggressive. U.K.

Note 2: U.K.

This parameter need not be measured unless the water originates from or is influenced by surface water. In the event of non-compliance with this parametric value, the Member State concerned must investigate the supply to ensure that there is no potential danger to human health arising from the presence of pathogenic micro-organisms, e.g. cryptosporidium. Member States must include the results of all such investigations in the reports they must submit under Article 13(2). U.K.

Note 3: U.K.

For still water put into bottles or containers, the minimum value may be reduced to 4,5 pH units. U.K.

For water put into bottles or containers which is naturally rich in or artificially enriched with carbon dioxide, the minimum value may be lower.

Note 4: U.K.

This parameter need not be measured if the parameter TOC is analysed. U.K.

Note 5: U.K.

For water put into bottles or containers the unit is number/250 ml. U.K.

Note 6: U.K.

This parameter need not be measured for supplies of less than 10 000 m³ a day. U.K.

Note 7: U.K.

In the case of surface water treatment, Member States should strive for a parametric value not exceeding 1,0 NTU (nephelometric turbidity units) in the water ex treatment works. U.K.

Note 8: U.K.

Monitoring frequencies to be set later in Annex II. U.K.

Note 9: U.K.

Excluding tritium, potassium -40, radon and radon decay products; monitoring frequencies, monitoring methods and the most relevant locations for monitoring points to be set later in Annex II. U.K.

Note 10: U.K.

1.

[F1 The Commission shall adopt the measures required under Note 8 on monitoring frequencies, and Note 9 on monitoring frequencies, monitoring methods and the most relevant locations for monitoring points in Annex II. Those measures, designed to amend non-essential elements of this Directive, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 12(3).

When elaborating those measures the Commission shall take into account, inter alia, the relevant provisions under existing legislation or appropriate monitoring programmes including monitoring results as derived from them.]

2.

A Member State is not required to monitor drinking water for tritium or radioactivity to establish total indicative dose where it is satisfied that, on the basis of other monitoring carried out, [X1 the levels of tritium or the calculated total indicative dose] are well below the parametric value. In that case, it shall communicate the grounds for its decision to the Commission, including the results of this other monitoring carried out.

ANNEX II U.K. MONITORING

TABLE A Parameters to be analysed U.K.

1. Check monitoring U.K.

The purpose of check monitoring is regularly to provide information on the organoleptic and microbiological quality of the water supplied for human consumption as well as information on the effectiveness of drinking-water treatment (particularly of disinfection) where it is used, in order to determine whether or not water intended for human consumption complies with the relevant parametric values laid down in this Directive.

The following parameters must be subject to check monitoring. Member States may add other parameters to this list if they deem it appropriate.

• Aluminium (Note 1)

• Ammonium

• Colour

• Conductivity

• Clostridium perfringens (including spores) (Note 2)

• Escherichia coli (E. coli)

• Hydrogen ion concentration

• Iron (Note 1)

• Nitrite (Note 3)

• Odour

• Pseudomonas aeruginosa (Note 4)

• Taste

• Colony count 22 °C and 37 °C (Note 4)

• Coliform bacteria

• Turbidity

a In all other cases, the parameters are in the list for audit monitoring.
Note 1:	Necessary only when used as flocculanta.
Note 2:	Necessary only if the water originates from or is influenced by surface watera.
Note 3:	Necessary only when chloramination is used as a disinfectanta.
Note 4:	Necessary only in the case of water offered for sale in bottles or containers.

[F1 2. Audit monitoring U.K.

The purpose of audit monitoring is to provide the information necessary to determine whether or not all of the Directive’s parametric values are being complied with. All parameters set in accordance with Article 5(2) and (3) must be subject to audit monitoring unless it can be established by the competent authorities, for a period of time to be determined by them, that a parameter is not likely to be present in a given supply in concentrations which could lead to the risk of a breach of the relevant parametric value. This point does not apply to the parameters for radioactivity, which, subject to Notes 8, 9 and 10 in Annex I, Part C, will be monitored in accordance with monitoring requirements adopted by the Commission. Those measures, designed to amend non-essential elements of this Directive by supplementing it, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 12(3).]

TABLE B1 Minimum frequency of sampling and analyses for water intended for human consumption supplied from a distribution network or from a tanker or used in a food-production undertaking U.K.

Member States must take samples at the points of compliance as defined in Article 6(1) to ensure that water intended for human consumption meets the requirements of the Directive. However, in the case of a distribution network, a Member State may take samples within the supply zone or at the treatment works for particular parameters if it can be demonstrated that there would be no adverse change to the measured value of the parameters concerned.

Note 1:
A supply zone is a geographically defined area within which water intended for human consumption comes from one or more sources and within which water quality may be considered as being approximately uniform.
Note 2:
The volumes are calculated as averages taken over a calendar year. A Member State may use the number of inhabitants in a supply zone instead of the volume of water to determine the minimum frequency, assuming a water consumption of 200 l/day/capita.
Note 3:
In the event of intermittent short-term supply the monitoring frequency of water distributed by tankers is to be decided by the Member State concerned.
Note 4:
For the different parameters in Annex I, a Member State may reduce the number of samples specified in the table if: (a) the values of the results obtained from samples taken during a period of at least two successive years are constant and significantly better than the limits laid down in Annex I, and (b) no factor is likely to cause a deterioration of the quality of the water. The lowest frequency applied must not be less than 50 % of the number of samples specified in the table except in the particular case of note 6.
Note 5:
As far as possible, the number of samples should be distributed equally in time and location.
Note 6:
The frequency is to be decided by the Member State concerned.
Volume of water distributed or produced each day within a supply zone(Notes 1 and 2)m3		Check monitoring number of samples per year(Notes 3, 4 and 5)	Audit monitoring number of samples per year(Notes 3 and 5)
	≤ 100	(Note 6)	(Note 6)
> 100	≤ 1 000	4	1
> 1 000	≤ 10 000	4 + 3 for each 1 000 m3/d and part thereof of the total volume	1 + 1 for each 3 300 m3/d and part thereof of the total volume
> 10 000	≤ 100 000		3 + 1 for each 10 000 m3/d and part thereof of the total volume
> 100 000			10 + 1 for each 25 000 m3/d and part thereof of the total volume

TABLE B2 Minimum frequency of sampling and analysis for water put into bottles or containers intended for sale U.K.

a The volumes are calculated as averages taken over a calendar year.
Volume of water produced for offering for sale in bottles or containers each dayam3		Check monitoring number of samples per year	Audit monitoring number of samples per year
≤ 10		1	1
> 10	≤ 60	12	1
> 60		1 for each 5 m3 and part thereof of the total volume	1 for each 100 m3 and part thereof of the total volume

ANNEX III U.K. SPECIFICATIONS FOR THE ANALYSIS OF PARAMETERS

Each Member State must ensure that any laboratory at which samples are analysed has a system of analytical quality control that is subject from time to time to checking by a person who is not under the control of the laboratory and who is approved by the competent authority for that purpose.

1. PARAMETERS FOR WHICH METHODS OF ANALYSIS ARE SPECIFIED U.K.

[F1 The following principles for methods of microbiological parameters are given either for reference, whenever a CEN/ISO method is given, or for guidance, pending the possible future adoption by the Commission of further CEN/ISO international methods for those parameters. Member States may use alternative methods, providing the provisions of Article 7(5) are met.

Those measures on further CEN/ISO international methods, designed to amend non-essential elements of this Directive, inter alia , by supplementing it, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 12(3).]

• Coliform bacteria and Escherichia coli (E. coli) (ISO 9308-1)

• Enterococci (ISO 7899-2)

• Pseudomonas aeruginosa (prEN ISO 12780)

• Enumeration of culturable microorganisms — Colony count 22 °C (prEN ISO 6222)

• Enumeration of culturable microorganisms — Colony count 37 °C (prEN ISO 6222)

• Clostridium perfringens (including spores)

Membrane filtration followed by anaerobic incubation of the membrane on m-CP agar (Note 1) at 44 ± 1 °C for 21 ± 3 hours. Count opaque yellow colonies that turn pink or red after exposure to ammonium hydroxide vapours for 20 to 30 seconds.

Note 1: U.K.

The composition of m-CP agar is: U.K.

• Basal medium

  Tryptose	30 g
  Yeast extract	20 g
  Sucrose	5 g
  L-cysteine hydrochloride	1 g
  MgSO4 · 7H2O	0,1 g
  Bromocresol purple	40 mg
  Agar	15 g
  Water	1 000 ml

• Dissolve the ingredients of the basal medium, adjust pH to 7,6 and autoclave at 121 °C for 15 minutes. Allow the medium to cool and add:

  D-cycloserine	400 mg
  Polymyxine-B sulphate	25 mg
  Indoxyl-β-D-glucoside to be dissolved in 8 ml sterile water before addition	60 mg
  Filter — sterilised 0,5 % phenolphthalein diphosphate solution	20 ml
  Filter — sterilised 4,5 % FeCl3 · 6H2O	2 ml

2. PARAMETERS FOR WHICH PERFORMANCE CHARACTERISTICS ARE SPECIFIED U.K.

2.1. For the following parameters, the specified performance characteristics are that the method of analysis used must, as a minimum, be capable of measuring concentrations equal to the parametric value with a trueness, precision and limit of detection specified. Whatever the sensitivity of the method of analysis used, the result must be expressed using at least the same number of decimals as for the parametric value considered in Annex I, Parts B and C. U.K.

Parameters	Trueness % of parametric value(Note 1)	Precision % of parametric value(Note 2)	Limit of detection % of parametric value(Note 3)	Conditions	Notes
Acrylamide				To be controlled by product specification
Aluminium	10	10	10
Ammonium	10	10	10
Antimony	25	25	25
Arsenic	10	10	10
Benzo(a)pyrene	25	25	25
Benzene	25	25	25
Boron	10	10	10
Bromate	25	25	25
Cadmium	10	10	10
Chloride	10	10	10
Chromium	10	10	10
Conductivity	10	10	10
Copper	10	10	10
Cyanide	10	10	10		Note 4
1,2-dichloroethane	25	25	10
Epichlorohydrin				To be controlled by product specification
Fluoride	10	10	10
Iron	10	10	10
Lead	10	10	10
Manganese	10	10	10
Mercury	20	10	20
Nickel	10	10	10
Nitrate	10	10	10
Nitrite	10	10	10
Oxidisability	25	25	10		Note 5
Pesticides	25	25	25		Note 6
Polycyclic aromatic hydrocarbons	25	25	25		Note 7
Selenium	10	10	10
Sodium	10	10	10
Sulphate	10	10	10
Tetrachloroethene	25	25	10		Note 8
Trichloroethene	25	25	10		Note 8
Trihalomethanes — Total	25	25	10		Note 7
Vinyl chloride				To be controlled by product specification

2.2. For hydrogen ion concentration the specified performance characterisatics are that the method of analysis used must be capable of measuring concentrations equal to the parametric value with a trueness of 0,2 pH unit and a precision of 0,2 pH unit. U.K.

a These terms are further defined in ISO 5725.
Note 1 a:	Trueness is the systematic error and is the difference between the mean value of the large number of repeated measurements and the true value.
Note 2 a:	Precision is the random error and is usually expressed as the standard deviation (within and between batch) of the spread of results about the mean. Acceptable precision is twice the relative standard deviation.

Note 3:	Limit of detection is either: three times the relative within batch standard deviation of a natural sample containing a low concentration of the parameter, or five times the relative within batch standard deviation of a blank sample.
Note 4:	The method should determine total cyanide in all forms.
Note 5:	Oxidation should be carried out for 10 minutes at 100 °C under acid conditions using permanganate.
Note 6:	The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. The limit of detection may not be achievable for all pesticides at present, but Member States should strive to achieve this standard.
Note 7:	The performance characteristics apply to the individual substances specified at 25 % of the parametric value in Annex I.
Note 8:	The performance characteristics apply to the individual substances specified at 50 % of the parametric value in Annex I.

3. PARAMETERS FOR WHICH NO METHOD OF ANALYSIS IS SPECIFIED U.K.

• Colour

• Odour

• Taste

• Total organic carbon

• Turbidity (Note 1)

Note 1:

For turbidity monitoring in treated surface water the specified performance characteristics are that the method of analysis used must, as a minimum, be capable of measuring concentrations equal to the parametric value with a trueness of 25 %, precision of 25 % and a 25 % limit of detection.

ANNEX IV U.K.

DEADLINES FOR TRANSPOSITION INTO NATIONAL LAW AND FOR APPLICATION

Directive 80/778/EECTransposition 17.7.1982Application 17.7.1985All Member States except Spain, Portugal and new Länder of Germany	Directive 81/858/EEC(Adaptation due to accession of Greece)	Act of Accession of Spain and PortugalSpain:transposition1.1.1986application1.1.1986Portugal:transposition1.1.1986application1.1.1989	Directive 90/656/EEC for new Länder of Germany	Act of Accession of Austria, Finland and SwedenAustria:transposition1.1.1995application1.1.1995Finland:transposition1.1.1995application1.1.1995Sweden:transposition1.1.1995application1.1.1995	Directive 91/692/EEC
Articles 1 to 14			Application 31.12.1995
Article 15	Amended with effect from 1.1.1981	Amended with effect from 1.1.1986		Amended with effect from 1.1.1995
Article 16
Article 17					Article 17(a) inserted
Article 18
Article 19		Amended	Amended
Article 20
Article 21

ANNEX V U.K.

CORRELATION TABLE

This Directive	Directive 80/778/EEC
Article 1(1)	Article 1(1)
Article 1(2)	—
Article 2(1) (a) and (b)	Article 2
Article 2(2)	—
Article 3(1) (a) and (b)	Article 4(1)
Article 3(2) (a) and (b)	—
Article 3(3)	—
Article 4(1)	Article 7(6)
Article 4(2)	Article 11
Article 5(1)	Article 7(1)
Article 5(2) first sentence	Article 7(3)
Article 5(2) second sentence	—
Article 5(3)	—
Article 6(1)	Article 12(2)
Article 6(2) to (3)	—
Article 7(1)	Article 12(1)
Article 7(2)	—
Article 7(3)	Article 12(3)
Article 7(4)	—
Article 7(5)	Article 12(5)
Article 7(6)	—
Article 8	—
Article 9(1)	Article 9(1) and Article 10(1)
Article 9(2) to (6)	—
Article 9(7)	Article 9(2) and Article 10(3)
Article 9(8)	—
Article 10	Article 8
Article 11(1)	—
Article 11(2)	Article 13
Article 12(1)	Article 14
Article 12(2) and (3)	Article 15
Article 13(1)	—
Article 13(2) to (5)	Article 17(a) (inserted by Directive 91/692/EEC)
Article 14	Article 19
Article 15	Article 20
Article 16	—
Article 17	Article 18
Article 18	—
Article 19	Article 21

(1)

To be added following the outcome of the study currently being carried out.