Article 1This Directive concerns the reference methods of measurement and frequencies of sampling and analysis for the parameters listed in Annex II to Directive 75/440/EEC.

Article 2For the purposes of this Directive:"reference method of measurement" means the designation of a measurement principle or a succinct description of a procedure for determining the value of the parameters listed in Annex I to this Directive,"limit of detection" means the minimum value of the parameter examined which it is possible to detect,"precision" means the range within which 95% of the results of measurements made on a single sample, using the same method, are located,"accuracy" means the difference between the true value of the parameter examined and the average experimental value obtained.

Article 31.Analysis of samples of water taken shall concern those parameters set out in Annex II to Directive 75/440/EEC to which I and/or G values have been assigned.2.Member States shall as far as possible use the reference methods of measurement referred to in Annex I to this Directive.3.The values for the limit of detection and for the precision and accuracy of the methods of measurement used to check the parameters set out in Annex I to this Directive must be respected.

Article 41.The minimum annual frequencies of sampling and analysis for each parameter are set out in Annex II to this Directive. Sampling must as far as possible be spread over the year so as to give a representative picture of the quality of the water.2.Surface water samples must be representative of the quality of the water at the sampling point as defined in Article 5 (4) of Directive 75/440/EEC.

Article 5The containers used for samples, the agents or methods used to preserve part of a sample for the analysis of one or more parameters, the conveyance and storage of samples and the preparation of samples for analysis must not be such as to bring about any significant change in the results of the analysis.

Article 61.The competent authorities of the Member States shall fix frequencies of sampling and analysis for each parameter for each sampling point.2.The frequencies of sampling and analysis shall be not less than the minimum annual frequencies given in Annex II to this Directive.

Article 71.Where a survey by the competent authorities of surface water intended for the abstraction of drinking water shows that the values obtained for certain parameters are considerably superior to those set by the Member States in accordance with Annex II to Directive 75/440/EEC, the Member State concerned may reduce the frequency of sampling and analysis for these parameters.2.If there is no pollution in the cases referred to in paragraph 1 and if there is no risk of the quality of water deteriorating and if the water in question is superior in quality to the indications given in column A1 of Annex II to Directive 75/440/EEC, the authorities concerned may decide that no regular analysis is necessary.

Article 8At intervals of three years the Member States shall send information to the Commission on the implementation of this Directive, in the form of a sectoral report which shall also cover other pertinent Community Directives. This report shall be drawn up on the basis of a questionnaire or outline drafted by the Commission in accordance with the procedure laid down in Article 6 of Directive 91/692/EECOJ No L 377, 31. 12. 1991, p. 48. The questionaire (SIC! questionnaire) or outline shall be sent to the Member States six months before the start of the period covered by the report. The report shall be sent to the Commission within nine months of the end of the three-year period covered by it.The first report shall cover the period from 1993 to 1995 inclusive.The Commission shall publish a Community report on the implementation of the Directive within nine months of receiving the reports from the Member States.

Article 9To take account in particular of alterations in the levels of the parameters specified in Annex II to Directive 75/440/EEC, the amendments required to adapt:the reference methods of measurement set out in Annex I to this Directive,the limit of detection, the precision and the accuracy of these methods,the materials recommended for the containerto technical progress, shall be adopted in accordance with the procedure set out in Article 11 of this Directive.

Article 101.A Committee on Adaptation to Technical and Scientific Progress (hereinafter referred to as the "Committee"), consisting of representatives of the Member States and chaired by a Commission representative, is hereby set up for the purpose laid down in Article 9.2.The Committee shall draw up its rules of procedure.

Article 111.The Commission shall be assisted by the Committee on Adaptation to Technical and Scientific Progress.2.Where reference is made to this Article, Articles 5 and 7 of Decision 1999/468/ECOJ L 184, 17.7.1999, p. 23. shall apply.The period laid down in Article 5(6) of Decision 1999/468/EC shall be set at three months.3.The committee shall adopt its rules of procedure.

Article 121.Directive 75/440/EEC is hereby amended as follows:(a)Article 5 (2) shall be deleted;(b)in Article 5 (3) the words "those referred to in paragraph 2" shall be replaced by the words "the parametric values for the water quality in question".2.Paragraph 1 shall take effect within two years of the notification of this Directive.

Article 13The Member States shall bring into force the laws, regulations and administrative provisions necessary to comply with this Directive within two years of its notification. They shall forthwith inform the Commission thereof.

Article 14This Directive is addressed to the Member States.

nullANNEX IReference method of measuring the I and/or G values of the parameters in Council Directive 75/440/EEC

Surface water samples taken at the abstraction point are analysed and measured after sieving (wire mesh sieve) to remove any floating debris such as wood or plastic.For waters of Category A1, G value.For waters of Categories A2 and A3.For waters of Category A3.For waters of Categories A1, A2, and A3, I value.For waters of Categories A2, I value and A3.For waters of Categories A2 and A3, G value.Mixture of six standard substances all of the same concentration to be taken into consideration: fluoranthene; 3,4 benzofluoranthene: 11, 12-benzofluoranthene; 3, 4-benzopyrene; 1, 12-benzoperylene; indano /1, 2, 3 - cd/pyrene.Mixture of three substances all of the same concentration to be taken into consideration: parathion, hexachlorocyclohexane, dieldrin.If the samples contain so much suspended matter as to require special preliminary treatment, the accuracy values shown in column E in this Annex may as an exception be exceeded and will be regarded as a target. These samples must be treated so as to ensure that the analysis covers the largest quantity of substances to be measured.As this method is not in current use in all the Member States, it is not certain that the limit of detection required for checking the values in Directive 75/440/EEC can be attained.Absence in 5000 ml (A1, G) and absence in 1000 ml (A2, G).

	Parameter		Limit of detection	Precision±	Accuracy±	Reference method of measurement	Materials recommended for the container
			Limit of detection	Precision±	Accuracy±	Reference method of measurement	Materials recommended for the container
(A)	(B)		(C)	(D)	(E)	(F)	(G)
1	pH	pH unit	—	0·1	0·2	—ElectrometryMeasured in situ at the time of sampling without prior treatment of the sample
2	Coloration (after simple filtration)	mg Pt/l	5	10 %	20 %	—Filtering through a glass fibre membranePhotometric method using the platinumcobalt scale
3	Total suspended solids	mg/l	—	5 %	10 %	—Filtering through a 0·45 μm filter membrane, drying at 105 °C and weighing
					—Centrifuging (for at least 5 mins with mean acceleration of 2800 to 3200 g), drying at 105 °C and weighing
4	Temperature	°C	—	0·5	1	—ThermometryMeasured in situ at the time of sampling without prior treatment of the sample
5	Conductivity at 20 °C	μS/cm	—	5 %	10 %	—Electrometry
6	Odour	Dilution factor at 25 °C	—	—	—	—By successive dilutions	Glass
7	Nitrates	mg/l NO3	2	10 %	20 %	—Molecular absorption spectrophotometry
8	Fluorides	mg/l F	0·05	10 %	20 %	—Molecular absorption spectrophotometry after distillation if necessary
					—Ion selective electrodes
9	Total extractable organic chlorine	mg/l Cl
10	Dissolved iron	mg/l Fe	0·02	10 %	20 %	—Atomic absorption spectrophotometry after filtering through a filter membrane (0·45 μm)
					—Molecular absorption spectrophotometry after filtering through a 0·45 μm filter membrane
11	Manganese	mg/l Mn	0·01	10 %	20 %	—Atomic absorption spectrophotometry
		0·02	10 %	20 %	—Atomic absorption spectrophotometry
					—Molecular absorption spectrophotometry
12	Copper	mg/l Cu	0·005	10 %	20 %	—Atomic absorption spectrophotometry
					—Polarography
		0·02	10 %	20 %	—Atomic absorption spectrophotometry
					—Molecular absorption spectrophotometry
					—Polarography
13	Zinc	mg/l Zn	0·01	10 %	20 %	—Atomic absorption spectrophotometry
		0·02	10 %	20 %	—Atomic absorption spectrophotometry
					—Molecular absorption spectrophotometry
14	Boron	mg/l B	0·1	10 %	20 %	—Molecular absorption spectrophotometry	Materials not containing boron in any significant quantities
					—Atomic absorption spectrophotometry
15	Beryllium	mg/l Be
16	Cobalt	mg/l Co
17	Nickel	mg/l Ni
18	Vanadium	mg/l V
19	Arsenic	mg/l As	0·002	20 %	20 %	—Atomic absorption spectrophotometry
		0·01			—Atomic absorption spectrophotometry
					—Molecular absorption spectrophotometry
20	Cadmium	mg/l Cd	0·0002	30 %	30 %	—Atomic absorption spectrophotometry
		0·001			—Polarography
21	Total chromium	mg/l Cr	0·01	20 %	30 %	—Atomic absorption spectrophotometry
					—Molecular absorption spectrophotometry
22	Lead	mg/l Pb	0·01	20 %	30 %	—Atomic absorption spectrophotometry
					—Polarography
23	Selenium	mg/l Se	0·005			—Atomic absorption spectrophotometry
24	Mercury	mg/l Hg	0·00010·0002	30 %	30 %	—Flameless atomic absorption spectrophotometry (cold vaporization)
25	Barium	mg/l Ba	0·02	15 %	30 %	—Atomic absorption spectrophotometry
26	Cyanide	mg/l CN	0·01	20 %	30 %	—Molecular absorption spectrophotometry
27	Sulphates	mg/l SO4	10	10 %	10 %	—Gravimetric analysis
					—EDTA compleximetry
					—Molecular absorption spectrophotometry
28	Chlorides	mg/l Cl	10	10 %	10 %	—Titration (Mohr's method)
					—Molecular absorption spectrophotometry
29	Surfactants (reacting with methylene blue)	mg/l (Lauryl Sulphate)	0·05	20 %		—Molecular absorption spectrophotometry
30	Phosphates	mg/l P2O5	0·02	10 %	20 %	—Molecular absorption spectrophotometry
31	Phenols (phenol index)	mg/l C6H5OH	0·0005	0,0005	0,0005	—Molecular absorption spectrophotometry 4 amionoantipyrine method	Glass
		0·001	30 %	50 %	—Paranitraniline method
32	Dissolved or emulsified hydrocarbons	mg/l	0·01	20 %	30 %	—Infra-red spectrometry after extraction by carbon tetrachloride	Glass
		0·04			—Gravimetry after extraction by petroleum ether
33	Polycyclic aromatic hydrocarbons	mg/l	0·00004	50 %	50 %	—Measurement of fluorescence in the UV after thin layer chromatographyComparative measurement in relation to a mixture of six control substances with the same concentration	Glass or aluminiumGlass or aluminium
34	Total pesticides (parathion, hexachlorocyclohexane, dieldrin)	mg/l	0·0001	50 %	50 %	—Gas or liquid chromatography after extraction by suitable solvents and purificationIdentification of the constituents of the mixtureQuantitative analysis	Glass
35	Chemical oxygen demand (COD)	mg/l O2	15	20 %	20 %	—Potassium dichromate method
36	Dissolved oxygen saturation rate	%	5	10 %	10 %	—Winkler's method	Glass
	Dissolved oxygen saturation rate					—Electrochemical method
37	Biochemical oxygen demand (BOD5) at 20 °C without nitrification	mg/l O2	2	1,5	2	—Determination of dissolved oxygen before and after five-day incubation at 20 °C ± 1 °C, in complete darkness Addition of a nitrification inhibitor
38	Nitrogen by Kjeldahl method (except in NO2 and NO3)	mg/l N	0·5	0,5	0,5	—Mineralization, distillation by Kjeldahl method and ammonium determination by means of molecular absorption spectrophotometry or titration
39	Ammonium	mg/l NH4	0·010·1	0,0310 %	0,0320 %	—Molecular absorption spectrophotometry
40	Substances extractable with chloroform	mg/l		—	—	—Extraction at neutral pH value by purified chloroform, evaporation in vacuo at room temperature, weighing of residue
41	Total organic carbon	mg/l C
42	Residual organic carbon after flocculation and membrane filtration (5 μm)	mg/l C
43	Total coliforms	/100 ml	5500			—Culture at 37 °C on an appropriate specific solid medium (such as Tergitol lactose agar, Endo agar, 0·4 % Teepol broth) with filtration or without filtration and colony count. Samples must be diluted or, where appropriate, concentrated in such a way as to contain between 20 and 100 colonies. If necessary, identification by gasification.	Sterilized glass
			5500			—Method of dilution with fermentation liquid substrates in at least three tubes in three dilutions. Sub-culturing of the positive tubes on a confirmation medium. Count according to MPN (most probable number). Incubation temperature: 37 °C ± 1 °C.
44	Faecal coliforms	/100 ml	2200			—Culture at 44 °C on an appropriate specific solid medium (such as Tergitol lactose agar, Endo agar, 0·4 % Teepol broth) with filtration or without filtration and colony count. Samples must be diluted or, where appropriate, concentrated in such a way as to contain between 10 and 100 colonies. If necessary, identification by gasification.	Sterilized glass
			2200			—Method of dilution with fermentation in liquid substrates in at least three tubes in three dilutions. Sub-culturing of the positive tubes on a confirmation medium. Count according to MPN (most probable number). Incubation temperature 44 °C ± 0.5 °C.
45	Faecal streptococci	/100 ml	2200			—Culture at 37 °C on an appropriate solid medium (such as sodium azide) with filtration or without filtration and colony count. Samples must be diluted or, where appropriate, concentrated in such a way as to contain between 10 and 100 colonies.	Sterilized glass
			2200			—Method of dilution in sodium azide broth in at least three tubes with three dilutions. Count according to MPN (most probable number)
46	Salmonella		1/5000 ml1/1000 ml			—Concentraion by filtration (on membrane or appropriate filter).	Sterilized glass
						—Innoculation into pre-enrichment medium. Enrichment and transfer into isolating gelese — Identification.

ANNEX IIMinimum annual frequency of sampling and analysis for each parameter in Directive 75/440/EEC

Quality of surface waters, Annex II Directive 75/440/EEC.Classification of parameters according to frequency.Frequency to be determined by the competent national authorities.Assuming that such surface water is intended for the abstraction of drinking water, the Member States are recommended to carry out at least annual sampling of this category of water (A3, III, ≤ 10000).

Population served	A1			A2			A3
Population served	I	II	III	I	II	III	I	II	III
≤ 10000
> 10000 to ≤ 30000	1	1		2	1		3	1	1
> 30000 to ≤ 100000	2	1		4	2	1	6	2	1
> 100000	3	2		8	4	1	12	4	1

Council Directive 79/869/EEC of 9 October 1979 concerning the methods of measurement and frequencies of sampling and analysis of surface water intended for the abstraction of drinking water in the Member States