Decree No. 252 / 2004 Coll.
Decree laying down the hygiene requirements for drinking and hot water and the frequency and scope of control of drinking water
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252
DECLARATION
of 22 April 2004
laying down hygiene requirements for drinking and hot water and the frequency and scope of control of drinking water
The Ministry of Health provides pursuant to § 108 (1) of Act No. 258 / 2000 Coll., on the Protection of Public Health and on the Amendment of Certain Related Acts, as amended by Act No. 274 / 2001 Coll. and Act No. 274 / 2003 Coll., (hereinafter "the Act ') for the implementation of § 3 (1), (3) and (5) and § 4 (1), (2), (4) and (7) of the Act and pursuant to § 19 (1) (a), (b) and (f) of Act No. 110 / 1997 Coll., on Food and Tobacco Products, and amending and supplementing certain related Acts, as amended by Act No. 306 / 2000 Coll.:
This decree implements the relevant provisions of the European Union1) and provides for
(a) the hygiene limits of microbiological, biological, physical, chemical and organoleptic quality indicators of drinking water2), including drinking water packaged 3) and hot water supplied by a utility water pipeline or internal water duct, which are constructively linked to the mixing battery with the drinking water pipeline ("hot water"), as well as hot water produced from an individual source for the personal hygiene of workers;
(b) the extent and frequency of checking compliance with the quality of drinking water; and
(c) the requirements for the quality control methods for drinking water.
Definition of terms
For the purposes of this decree:
(a) hygiene limit - the value set out in Annexes 1, 2 and 3 or the value laid down by the public health authority by law, 4)
(b) limit value - the value of the drinking water quality indicator, the excess of which usually does not pose an acute health risk. Unless otherwise specified for the indicator, this is the upper limit of the tolerance limits,
(c) guide value - indication value initiating health risk assessment and management,
(d) recommended value - non-binding value of the drinking water quality indicator, which determines the minimum desired or acceptable concentration of the substance or the optimal concentration range of the substance;
(e) reference value - the value of the raw water quality indicator over which it is necessary to assess the effectiveness of the water treatment;
(f) the maximum limit value - the value of a medically significant drinking water quality indicator, which is exceeded by excluding the use of water as drinking water, unless otherwise specified by the public health authority under the Act (4),
(g) the supplied area - the designated territory of more than one, or part of the cadastral territory in which the distribution network in which drinking water comes from one or more sources and the quality of which can be considered to be approximately equal and the water in that distribution network is supplied by one operator, (5) where appropriate, by the owner of a public water pipeline;
(h) an automatic dispenser - an artificially installed drinking water tank which is not directly connected to the water supply, but the water is imported into it or supplied from an appropriate water source, the collection of drinking water being done by automatic or manual dosing; a drinking water dispenser is not considered to be a drinking dispenser and a packaged water dispenser, usually referred to as "watercooler,"
(i) by interrupting the supply of water - the outlet or part thereof associated with the discharge of water from the pipeline;
(j) full analysis - analysis to the extent of the characteristics listed in Annex 5, taking into account comments on these indicators, unless otherwise provided by law by the public health authority;
(k) by a reduced analysis - an analysis to the extent of the characteristics listed in Annex 5, taking into account comments on these indicators, unless otherwise provided by the public health authority under the law;
(l) raw water - water taken from surface or groundwater for drinking water treatment;
(m) water-treated - raw water after a certain technological degree of treatment,
(n) treated water - water passed through technological processes to achieve the required quality of drinking water, including water that can be supplied as drinking water without any treatment; water treated means also water produced;
(o) water supplied - water entering the distribution network intended for use as drinking water; water supplied also includes water in the distribution network and water flowing from the tap at the consumer,
(p) danger - any biological, chemical, physical or radiological agent in water or condition which may endanger the health of consumers or water consumers or cause organoleptic water defects; the hazard is also a restriction or total interruption of the supply of water to customers,
(q) a dangerous event - an event in which the drinking water supply system creates or fails to remove a hazard from that system,
(r) risk - combination of the likelihood of a dangerous event and the severity of the consequences of the hazard,
(s) critical point - a place in the supply system or internal water duct where a dangerous event associated with an unacceptable risk is manifested and monitored under operational monitoring;
(t) control measures - any activity which may be used to prevent or reduce to an acceptable level any danger which cannot be completely excluded by any measure;
(u) corrective action - any action by which the hazard can be completely eliminated or significantly reduced.
Quality indicators for drinking and hot water and their hygiene limits
(1) Drinking water must have physicochemical properties which do not pose a threat to public health. All measures taken in connection with the hygiene requirements for drinking water shall be based on the precautionary principle and shall not in any circumstances result in deterioration of the quality of drinking water. Drinking and hot water shall not contain micro-organisms, parasites and substances of any kind in number or concentration liable to endanger public health. The quality indicators for drinking water and their hygiene limits are set out in Annex 1. For raw or drinking waters where the calcium or magnesium content is artificially reduced during treatment, the magnesium content shall not be less than 10 mg / l and the calcium content shall not be less than 30 mg / l after treatment. The radiological indicators of drinking water and their values are laid down in a specific legislative legislation.6)
(2) The hot water quality indicators referred to in the first and second sentences of Section 3 (3) of the Act and their hygiene limits are set out in Annex 2.
(3) The hot water quality indicators referred to in Section 41a (1) of the Act and their hygiene limits are set out in Annex 3.
Procedure for drawing up and evaluating the results of the assessment and management of risks in the drinking water supply system
The assessment and management of risks in the drinking water supply system shall be processed as a document describing the course of the risk analysis of the drinking water supply system and proposing corrective and control measures to address unacceptable risks; the specific procedure for drawing up and evaluating the results of this procedure is set out in Annex 7 to this Decree.
Procedure for developing risk assessment and management of internal water supply and connection in priority areas
(1) The assessment and management of the risks of the internal tap and the connections in the priority areas referred to in Article 3d (1) and (2) of the Act shall be processed as a document describing the course of the risk analysis of the internal tap and the connection and proposing corrective and control measures to remedy and prevent unacceptable risks; the specific procedure for drawing up and evaluating the results of the procedure is set out in Annex 8 to this Decree.
(2) Risk assessment and management in priority areas with regard to the risk of lead in drinking water is carried out in accordance with Tables 1, 2 and 3 of Annex No 8 to this Decree.
(3) Risk assessment and management in priority areas with regard to the risk of presence of Legionella in the hot water distribution shall be carried out in accordance with Tables 1, 2, 4 and 5 of Annex 8 to this Regulation.
Drinking water control
Method of implementation of the monitoring programme
(1) The implementation of the monitoring programme shall include:
(a) checks on the risk activities in the water source protection zone and, where appropriate, on the wider territory concerned, where necessary in order to protect the water source from pollution;
(b) checks on the state of the protection zone, on the construction of the reception facilities, on water treatment plants, on water jams, on service stations and on other related infrastructure of the drinking water supply system, including checks on the security of such premises against the intrusion of unauthorised persons;
(c) checks on the functionality and maintenance status of the technical equipment used for the reception, transport, treatment, disinfection, quality control of drinking water or the measurement of the pressure or quantity of drinking water supplied, as well as for checking the security of operating objects;
(d) measurements recorded in the continuous monitoring process for the control of the quality of raw, treated, treated or supplied water or for the control of water treatment processes; these measurements shall be used where the assessment and management of risks in the drinking water supply system results from the necessary control measures,
(e) the collection and analysis of point samples of raw, treated, treated and supplied water.
(2) The sites, scope and frequency of checks, measurements and withdrawals are determined according to the complexity and vulnerability of the supply system, in particular the stability of raw water quality, the treatment technology including water disinfection and the results of the assessment and risk management of the drinking water supply system under this Decree.
(3) Sampling and analysis of raw water samples for classification shall be carried out in accordance with a special Regulation (10). The indication of the source in the operating order also includes the inclusion of raw water in the relevant category according to the Special Regulation (10). For the assessment of the quality of raw water in the assessment and management of risks in the drinking water supply system, the relevant results of the monitoring of the quality of groundwater and surface water carried out in order to determine the condition of water under Act No. 254 / 2001 Coll., on Water and amending certain laws (Water Act), as amended, shall also be used.
(4) Operational analyses containing raw, treated, treated and supplied drinking water to control the production of drinking water shall be carried out in accordance with the water quality control plan during the production of drinking water under the special Regulation (10).
(5) The sampling and analysis of drinking water to demonstrate that the treated water at the exit from the laboratory or water not requiring treatment of water before entering the network and the water supplied at the point of compliance with the requirements laid down in Section 8 is safe and complies with all the requirements laid down, shall be carried out in accordance with Annexes 4 and 5 to this Regulation. The water producer, which also supplies it to consumers, shall carry out a full analysis at a frequency corresponding to the total production of drinking water, including water sold to another operator. If the water manufacturer does not operate any supplied area itself and the water is immediately transmitted from the outlet to another operator, the full analysis shall be carried out only at the outlet of the plant, to the extent that all indicators listed in the table in Part 2 of Annex 5 to this Regulation are present. The water manufacturer shall immediately provide the results of the analysis to the operators of the downstream water pipelines. The operator of the operating water supply line shall only carry out the full analysis of the consumer and shall analyse only the parameters made compulsory for the water supplied in accordance with Part 2 of Annex 5 to this Regulation and the other indicators resulting from the assessment and management of risks in the drinking water supply system in the frequency corresponding to the volume of drinking water supplied. Where the operator takes a sample within a complete analysis of both the output and the consumer, it shall be a time-related sampling where no more than 7 working days between the sampling of the two samples shall elapse. Compliance with this period does not concern cases where the water treatment plant and distribution network is operated by different operators or are persons under Section 3 (2) of the Act operating a system of supply of drinking water not covered by Act No. 274 / 2001 Coll., or the operator has included complete analyses in the monitoring programme to the extent of all indicators both from the laboratory and from the end of the network.
(6) If drinking water is supplied only for part of the year, the frequency of analyses shall be reduced proportionally, but shall not be less than the lowest category of Annex 4 to this Decree.
(7) In addition to the frequency referred to in paragraphs 5 and 6, sampling and analysis of drinking water samples shall be carried out:
(a) from a new part of water7) to be put into service; a new part of the water supply line shall not be considered as fittings and immediately related parts of the pipeline up to 10 m in length to each side of the supply line, the replacement of part of the pipeline up to 15 m in length or the connection of the old and new pipelines to the same length,
(b) in the event of interruption of water supply for more than 24 hours;
(c) prior to the start of seasonal use of the part of the tap or individual drinking water source; for sources with a minimum frequency of analyses and seasonal operations of up to 6 months, operated under § 3 (2) (a) to (d) of the Act, this analysis may be counted against the minimum annual frequency referred to in paragraphs 5 and 6;
(d) after repair of the tap which could affect the quality of the water in the tap.
(8) The analysis referred to in paragraph 7 shall be carried out within the scope of the reduced analysis referred to in Annex 5 to this Decree, extended by the indicators, the content of which may be increased due to those changes in the supply arrangements for drinking water.
(9) For the purpose of applying for the approval of the new operating order for the introduction of a new source of drinking water, water analysis from a new source shall be documented and, where appropriate, water treatment other than disinfection is required, the treatment of the treated water from the technological test of the water treatment plant in those indicators where water treatment or which may be affected by the water treatment applied, in parallel with the analysis of the raw water before water is delivered to the consumer. The purpose of this analysis, which shall not be more than 6 months old, is to demonstrate that the technology proposed is suitable for the treatment of crude water into drinking water and that the parameters of drinking water will be achieved in accordance with this Decree.
(10) Water control used in means of transport shall be carried out within the scope of a shortened analysis, extended by indicators the value of which may be altered by materials with which water comes into contact, or by additional treatment of water, provided that the water is taken from the tap or other drinking water source where the water quality meets the requirements of this Decree and is regularly monitored.
(1) Samples of drinking water at the outlet of the plant, in the distribution network and in the consumer shall be taken to be representative of the quality of the drinking water consumed throughout the year and for the whole water supply network for the inspection referred to in Article 4 (5). The number of sampling points shall be at least equal to the number of cut analyses referred to in Annex 4, and for water pipelines supplying more than 5000 inhabitants, the number of sampling points shall be at least 80% of the number of cut analyses referred to in Annex 4.
(2) The consumer sampling points must be chosen in such a way that, for supplied areas supplying more than 5 000 inhabitants, more than 50% of the sampling points are not permanent, but change each year; for supplied areas supplying 5,000 and fewer inhabitants, more than 65% of the sampling sites must not be permanent. The changing sampling points shall be selected by a random selection method or by another appropriate method to ensure that none of the supplied objects is excluded from the control option.
(3) The sampling points for each indicator are set out in Annex 5 to this Regulation.
Frequency and extent of analyses for dispensers
(1) A full analysis of drinking water shall be carried out on the new dispenser before putting into service. During the first year of operation, a monthly microbiological analysis shall be carried out in the range of shortened analysis and every 6 months in the range of biological, chemical, physical and organoleptic analysis in the range of shortened analysis extended to lead, chromium, nickel and zinc indicators. For zinc, a maximum limit value of 3 mg / l is set. In the case of results meeting the hygiene limits during the first year of operation, biological, chemical, physical and organoleptic analysis shall be carried out once a year in the range of shortened analysis and once every 2 months in the range of shortened analysis.
(2) The water source from which the water is imported or delivered to the vending machines is checked in the frequency set out in Annex 4 to this Decree according to the volume of the water produced, but at least in the range of 6 cut analyses extended by the intestinal enterococci indicator and 1 complete analysis per year.
Sampling requirements and methods of analysis
(1) Unless otherwise provided for in this Decree, sampling of drinking or hot water shall be carried out according to the methods contained in Czech technical standards. 8)
(2) Sampling of drinking water for the determination of microbiological parameters is carried out in accordance with Table 1 of EN ISO 19458 (757801) Water quality - Sampling for microbiological analysis, according to the purpose of sampling "b '- from the faucet, where the consumer is concerned, or from the purpose of sampling" a' - from the distribution line, where the output from the plant or within the distribution network is mainly from the water jams and, where justified, from the hydrants. Both samples include removal of all connected devices and disinfection of the tap or discharge valve.
(3) The methods set out in Section A of Annex 6 to this Decree are laid down for the determination of the values of the microbiological and biological indicators of drinking water and hot water listed in Annexes 1 to 3 to this Regulation. Any analytical methods complying with the requirements set out in Section B of Annex 6 to this Regulation may be used to determine the values of the physical and chemical indicators of drinking and hot water listed in Annexes 1 to 3 to this Regulation.
(4) Demonstration that the results of another method, not listed in Section A of Annex 6, are at least as reliable as the results of the laboratory method, the application of which is provided for in this Decree, shall be carried out by the method set out in the technical standard setting out the criteria for the equivalence of the two microbiological methods (11).
Points of compliance with drinking and hot water quality requirements
(1) The hygiene limits of the drinking water quality indicators referred to in Annex 1 to this Decree must be respected
(a) in the case of drinking water supplied from the mains, in a place within the building or on a site where drinking water flows from taps intended for human consumption;
(b) in the case of drinking water supplied from wells, artificially installed tanks or tanks, at the point of discharge from the well, tank or tank;
(c) in the case of bottled drinking water3) put up in bottles or storage tanks intended for sale or for replacement supply at the point of bottling of water. In the case of bottled drinking water intended for sale, the hygiene limits shall also be complied with for the minimum durability until the original packaging is opened, except for colony count indicators at 22 ° C and 36 ° C, for which the limit values of 500 colonies forming a unit / ml (hereinafter referred to as "KTJ / ml ') apply for colony count indicators at 22 ° C and 100 KTJ / ml for colony count indicator at 36 ° C,
(d) for drinking water used in a food establishment, (9) at the place of use.
(2) The hygiene limits of the hot water indicators must be observed at all places within the building or on land where hot water flows from the faucet or from the shower.
Repeated analyses
(1) Where the result is the determination of the values of chemical and physical indicators with a limit value and a maximum limit value or microbiological and biological indicators with a limit value higher than the hygiene limit, the sampling of drinking water and the determination of the values of indicators for which the limit has been exceeded shall be repeated without delay to confirm the non-compliance with the hygiene limits and, where appropriate, to verify the effectiveness of the corrective measures taken. In the event of a minor excess of the limit values, the corrective measures provided for in Article 4 (5) of the Act may be implemented at the latest after confirmation of non-compliance with the hygiene limits.
(2) Where the result of the determination of the values of microbiological and biological indicators with a maximum hygiene limit is higher than the maximum, the corrective measures referred to in Article 4 (4) of the Act and the sampling of drinking water and the determination of the values of indicators that have exceeded the hygiene limit shall be repeated to confirm the effectiveness of the corrective measures implemented.
(3) Repeated analyses shall not be taken into account in the minimum required sampling frequency set out in Annex 4 to this Decree.
Transitional and final provisions
(1) From the date of entry into force of the Decree until 31 December 2007, sampling points must be selected in such a way that more than 25% of the sampling points are not permanent, but are changed each year. The changing sampling points shall be selected by a random selection method or other appropriate method to ensure that none of the supplied objects is excluded from the control option.
(2) For the "bromates' indicator the hygiene limit of 25 μg / l (maximum limit value) shall apply until 24 December 2008, for the" chlorites' indicator the hygiene limit of 400 μg / l (limit value) shall apply until 24 December 2006, for the "lead 'indicator shall apply the hygiene limit of 25 μg / l (maximum limit value) until 24 December 2013. For bottled drinking water and drinking water supplied from dispensers, the hygiene limits set out in Annex 1 shall apply from the entry into force of the Decree.
Decree No. 376 / 2000 Coll., laying down requirements for drinking water and the scope and frequency of its control, is hereby repealed.
Efficacy
This Decree shall take effect on 1 May 2004.
Minister:
Dr. Kubinyi, Ph.D. v. r.
Příloha č. 1
Annex No 1 to Decree No. 252 / 2004 Coll.
Microbiological, biological, physical, chemical and organoleptic potable water indicators and their hygiene limits
A. Microbiological and biological indicators
| č. | ukazatel | jednotka | limit | typ limitu | vysvětlivky |
|---|---|---|---|---|---|
| 1 | Clostridium perfringens | KTJ/100 ml | 0 | MH | |
| 2 | intestinální enterokoky | KTJ/100 ml | 0 | NMH | |
| KTJ/250 ml | 0 | NMH | 1 | ||
| 3 | Escherichia coli | KTJ (MPN)/100 ml | 0 | NMH | |
| KTJ (MPN)/250 ml | 0 | NMH | 1 | ||
| 4 | koliformní bakterie | KTJ (MPN)/100 ml | 0 | MH | |
| KTJ (MPN)/250 ml | 0 | MH | 1 | ||
| 5 | mikroskopický obraz - abioseston | % | 5 | MH | 2 |
| 6 | mikroskopický obraz - počet organismů | jedinci/ml | 50 | MH | 2, 3 |
| 7 | mikroskopický obraz - živé organismy | jedinci/ml | 0 | MH | 2, 3, 4 |
| 8 | počty kolonií při 22 °C | KTJ/ml | Bez abnormálních změn | MH | 5 |
| KTJ/ml | 200 | DH | 6 | ||
| KTJ/ml | 100 | MH | 1 | ||
| 9 | počty kolonií při 36 °C | KTJ/ml | Bez abnormálních změn | MH | 7 |
| KTJ/ml | 40 | DH | 8 | ||
| KTJ/ml | 20 | MH | 1 | ||
| 10 | Pseudomonas aeruginosa | KTJ/250 ml | 0 | NMH | 1 |
B. Physical, chemical and organoleptic indicators
| č. | ukazatel | zkratka | jednotka | limit | typ limitu | vysvětlivky |
|---|---|---|---|---|---|---|
| 11 | 1,2-dichlorethan | μg/l | 3,0 | NMH | ||
| 12 | akrylamid | μg/l | 0,1 | NMH | 9 | |
| 13 | amonné ionty | NH4+ | mg/l | 0,50 | MH | |
| 14 | antimon | Sb | μg/l | 10,0 | NMH | |
| 15 | arsen | As | μg/l | 10 | NMH | |
| 16 | barva | mg/l Pt | 20 | MH | ||
| 17 | benzen | μg/l | 1,0 | NMH | ||
| 18 | benzo[a]pyren | BaP | μg/l | 0,01 | NMH | |
| 19 | beryllium | Be | μg/l | 2,0 | NMH | |
| 20 | bisfenol A | BPA | μg/l | 2,5 | NMH | |
| 21 | bor | B | mg/l | 1,5 | NMH | 33 |
| 22 | bromičnany | BrO3- | μg/l | 10 | NMH | 10 |
| 23 | celkový organický uhlík | TOC | mg/l | 5,0 | MH | 11 |
| 24 | draslík | K | mg/l | 1 - 10 | DH | |
| 25 | dusičnany | NO3- | mg/l | 50 | NMH | 12 |
| 26 | dusitany | NO2- | mg/l | 0,50 | NMH | 12 |
| 27 | epichlorhydrin | μg/l | 0,10 | NMH | 9 | |
| 28 | fluoridy | F- | mg/l | 1,5 | NMH | |
| 29 | halogenoctové kyseliny | HAA | μg/l | 60 | NMH | 32 |
| 30 | hliník | Al | mg/l | 0,20 | MH | |
| 31 | hořčík | Mg | mg/l | 10 | MH | 13 |
| 20-30 | DH | |||||
| 32 | chemická spotřeba kyslíku (manganistanem) | CHSK - Mn | mg/l | 3,0 | MH | 11 |
| 33 | chlor volný | Cl2 | mg/l | 0,3 | MH | 14 |
| 34 | chlorečnany | ClO3- | μg/l | 250 | NMH | 10, 15 |
| 35 | chlorethen (vinylchlorid) | μg/l | 0,50 | NMH | 9 | |
| 36 | chloridy | Cl- | mg/l | 250 | MH | 16, 17 |
| 37 | chloritany | ClO2- | μg/l | 250 | NMH | 10, 15 |
| 38 | chrom | Cr | μg/l | 25 | NMH | |
| 39 | chuť | přijatelná pro odběratele | MH | 18 | ||
| 40 | kadmium | Cd | μg/l | 5,0 | NMH | |
| 41 | konduktivita | k | mS/m | 125 | MH | 17,19 |
| 42 | kyanidy celkové | CN- | mg/l | 0,050 | NMH | |
| 43 | mangan | Mn | mg/l | 0,050 | MH | |
| 44 | měď | Cu | μg/l | 1000 | NMH | 20 |
| 45 | microcystin-LR | μg/l | 1 | NMH | ||
| 46 | nikl | Ni | μg/l | 20 | NMH | 20 |
| 47 | olovo | Pb | μg/l | 5 | NMH | 20 |
| 48 | ozon | O3 | μg/l | 50 | NMH | 17 |
| 49 | pach | přijatelný pro odběratele | MH | 18 | ||
| 50 | pesticidní látky | PL | μg/l | 0,10 | NMH | 21,22 |
| 51 | pesticidní látky celkem | PLC | μg/l | 0,50 | NMH | 21,23 |
| 52 | PFAS suma | PFAS | μg/l | 0,10 | NMH | 30 |
| 53 | pH | pH | 6,5-9,5 | MH | 17, 25 | |
| 54 | polycyklické aromatické uhlovodíky | PAU | μg/l | 0,10 | NMH | 24 |
| 55 | rtuť | Hg | μg/l | 1,0 | NMH | |
| 56 | selen | Se | μg/l | 20 | NMH | 31 |
| 57 | sírany | SO42- | mg/l | 250 | MH | 17 |
| 58 | sodík | Na | mg/l | 200 | MH | |
| 59 | stříbro | Ag | μg/l | 25 | NMH | |
| 60 | teplota | °C | 8-12 | DH | ||
| 61 | tetrachlorethen | PCE | μg/l | 10 | NMH | 26 |
| 62 | trihalomethany | THM | μg/l | 50 | NMH | 27 |
| 63 | trichlorethen | TCE | μg/l | 10 | NMH | 26 |
| 64 | trichlormethan (chloroform) | μg/l | 30 | NMH | 10 | |
| 65 | uran | U | μg/l | 15 | NMH | |
| 66 | vápník | Ca | mg/l | 30 | MH | 13 |
| 40-80 | DH | |||||
| 67 | vápník a hořčík | Ca + Mg | mmol/l | 2-3,5 | DH | |
| 68 | zákal | ZF (n) | 5 | MH | 28 | |
| 69 | železo | Fe | mg/l | 0,20 | MH | 29 |
The abbreviations used:
KTJ - colony forming unit using method of determination CSN EN ISO 9308-1
MPN - most likely number of bacteria using the method of determination CSN EN ISO 9308-2
NMH - maximum limit value
MH - limit value
DH - recommended value according to § 3 paragraph 1 of Act No. 258 / 2000 Coll., on the Protection of Public Health and on the amendment of certain related laws, as amended
Explanatory notes:
1. Applies only to bottled drinking water.
2. Other information obtained in the microscopic analysis, which may contribute to the interpretation of the results, is an integral part of the test result and is given in the form of a verbal description. This verbal description includes, in particular, the composition of the abioseston present (possibly its possible origin), the closer classification of the organisms present and their possible origin (raw water, network reproduction), their affiliation to difficult to remove groups. In the event of the occurrence of live organisms in waters secured by disinfection, it is always necessary to indicate which organisms were involved. In the case of groundwater, the presence of surface water-bound organisms and organisms indicating impaired water quality shall be recorded. Underground water with the presence of surface water-bound organisms shall be considered as surface water-affected groundwater according to Explanatory Note 1 under Table A in Annex 5 to this Decree.
3. For the purposes of this decree, the organisms covered by this indicator are sinuses and all eukaryonic organisms, in particular algae, protozoa, micromycets, swirlers, tubers. Bacteria with the exception of sinuses are given only in the word description, but are not counted in the total number of organisms. A massive finding in the counting chamber of observable bacteria should be considered as exceeding MH indicators 6 or 7 as appropriate. The products of ferric bacteria metabolism are among the asosestone.
4. The limit value shall be determined only for waters secured by disinfection. Live organisms containing chlorophyll are distinguished by the autofluorescence of chlorophyll. Other, if possible, according to other features such as especially movement and state of protoplastic.
5. If it is not possible for a small number of samples to determine if this is an abnormal change for the supplied area, the limit value 200 cfu / ml shall apply.
6. For replacement supplies, for water supplied in air, water and land vehicles and for water from small undisinfected sources producing less than 5 m3 per day, the recommended value shall be up to 500 cfu / ml.
7. If it is not possible for a small number of samples to determine if this is an abnormal change for the supplied area, the limit of 40 cfu / ml shall apply.
8. For replacement supplies, for water supplied in air, water and land vehicles and for water from small undisinfected sources producing less than 5 m3 per day, the recommended value shall be up to 100 cfu / ml.
9. The value shall be valid for the residual concentration of the monomer calculated according to the content and possible release data of materials and articles used for the treatment, manufacture and distribution of drinking water in contact with drinking water.
10. The aim is to achieve the lowest possible value - without reducing the effectiveness of disinfection.
11. No abnormal changes.
12. The condition that the sum of the nitrate content determined in mg / l divided by 50 and the nitrite content determined in mg / l divided by 3 is less than or equal to 1 shall be respected. The sum of ratios corresponds to the highest limit value of its importance. The nitrite content in drinking water at the outlet of the plant shall be less than 0,1 mg / l.
13. It applies as a minimum in the case referred to in § 3 (1). For all waters, the aim is to achieve the recommended value.
14. The limit of 0,3 mg / l shall apply to the consumer's sampling points, not to the output from the laboratory or to the water heater. In the case of the use of bound active chlorine for disinfection, the total active chlorine shall be the limit value 0,4 mg / l. However, the consumer must not be affected by the acceptability of odour and taste of water.
15. The sum of the concentrations of chlorates and chlorites shall not exceed 250 μg / l.
16. The limit value (250 mg / l) is determined in terms of organoleptic. The chloride indicator may also serve as an indicator of faecal contamination with a recommended value < 100 mg / l.
17. Water should not act aggressively against materials of the distribution system, including home installations. Assessment of aggressiveness is performed according to TNV 75 7121 Water quality. Water quality requirements transported by pipeline.
18. The subject of the test is all kinds of unpleasant odours and flavours that may be the subject of complaints from customers, i.e. odours and flavours caused by the disinfectant used. In case of doubt in sensory evaluation, threshold numbers 1 and 2 are considered acceptable when determined according to ČSN EN 1622 Water quality - Determination of threshold number (TON) and threshold number (TFN). For this evaluation, the freshest water sample shall be used and the threshold number shall not be carried out in accordance with point 10.1 of the standard (the sample shall not be decontaminated), except for samples taken at the exit from the laboratory or on a waterbed. If it is not possible for safety reasons or other objective causes (a sample of water does not comply with microbiological, opacity, colour or odour or could otherwise endanger the health of the assessor) to determine the taste, instead of the result, the "Unable to be determined 'shall be entered in the report.
19. Measured at 25 ° C.
20. The limit applies to a sample of drinking water taken by the corresponding tap sampling method in the consumer so that the sample is representative of the average one-week quantity consumed by the consumer.
21. Pesticide substances are organic insecticides, herbicides, fungicides, nematicides, acaricides, algicides, rodenticides, slimicides, related products, including growth regulators, and their relevant metabolites.
22. The limit value applies to each individual pesticide substance and its relevant metabolite with the exception of aldrin, dieldrin, heptachlor and heptachlor epoxide, where a limit value of 0,03 μg / l applies.
23. The limit applies to the sum of the individual identified and quantitatively identified pesticide substances and their relevant metabolites. If the substance is not quantitatively detected, zero is added to the sum. Where all substances in the sum indicator of "total pesticide substances' are below the limit of determination, the result is expressed as 0 in this case. If the laboratory indicates in the protocol the result of the indicator" Pesticide substances total ', it shall also indicate the results of all specified individual pesticide substances and their relevant metabolites.
24. The limit applies to the sum of quantitatively determined specific substances: benzo [b] fluoranthene, benzo [k] fluoranthene, benzo [ghi] perylene, indeno [1,2,3-cd] pyrene. If the substance is not quantitatively detected, zero is added to the sum. In case all substances in the sum indicator "polycyclic aromatic hydrocarbons' are below the limit of determination, the result is expressed as 0 in this case. If other polyaromatic hydrocarbon types are established, their value cannot be included in the PAH indicator.
25. For packaged non-aerated drinking water and for drinking water transported by accumulation tanks, a pH of 5,5 may be allowed; for packaged drinking water which is naturally rich or artificially enriched with carbon dioxide, the minimum value may be lower. For waters with naturally lower pH, pH values of 6,0 to 6,5 shall be considered as meeting the requirements of this Decree provided that the water does not act aggressively against the materials of the distribution system.
26. The sum of the concentrations of tetrachloroethane and trichloroethane shall not exceed 10 μg / l.
27. The limit applies to the sum of quantitatively identified concentrations of trichloromethane (chloroform), tribromomethane (bromoform), dibromochloromethane and bromodichloromethane. If the substance is not quantitatively detected, zero is added to the sum. In case all substances in the sum indicator "trihalomethanes' are below the limit of determination, the result is expressed as 0 in this case. In addition to the sum of trihalomethanes, the laboratory report shall also show all 4 individual substances. The aim is to achieve the lowest possible value (the result of determination below the limit of detection is desirable) without reducing the effectiveness of disinfection.
28. In cases of surface water treatment, water resulting from the treatment plant should not exceed 1,0 PLN (n). A non-phelometric method shall be used for the determination.
29. In cases where higher iron values in the raw water source are caused by a geological background, values of iron up to 0,5 mg / l shall be considered to comply with the requirements of this Decree, provided that there is no adverse effect on organoleptic properties of water, even in the form of occasional visible opacity.
30. Sum of perfluorobutanoic acid (PFPA), perfluorohexanoic acid (PFPA), perfluorodecanoic acid (PFXA), perfluorodecanoic acid (PFDA), perfluorodecanoic acid (PFPA), perfluorodecanoic acid (PFDA), perfluorodecanoic acid (PFPA), perfluorodecanoic acid (PFDA), perfluorodecanoic acid (PFBS), perfluorodecanoic acid (PFPA), perfluorododecanoic acid (PFDA), perfluorotridecanoic acid (PFDA), perfluorobutanesulfonic acid (PFBS), perfluorodecanoic acid (PFPS), perfluorodecanosulphonic acid (PFPS), perfluorodecanoic acid (PFPS), perfluorosulphonic acid, It is a sub-group of substances included in the "sum of PFAS 'containing a perfluoroalkyl group of 3 or more carbons (i.e. -CnF2n-, n ≥ 3) or a perfluoroalkyl group of 2 or more carbons (i.e. -CnF2nOCmF2 m-, n and m ≥ 1). If the substance is not quantitatively detected, zero is added to the sum. If all the substances in the sum indicator" PFAS' are below the limit of determination, the result is expressed as 0 in this case. All 20 individual substances must also be included in the laboratory report in addition to the sum of PFAS.
31. In cases where higher levels of selenium are caused by a geological background, values up to 30 μg / l are considered to comply with the requirements of this decree.
32. The limit applies to the sum of quantitatively determined acid concentrations: chloroacetic, dichloroacetic, trichloroacetic, bromoacetic and dibromoacetic concentrations. If the substance is not quantitatively detected, zero is added to the sum. Where all substances in the sum indicator of "halogen acid 'are below the limit of determination, the result is expressed as 0 in this case. All 5 individual substances shall also be indicated on the laboratory report in addition to the sum of halogen acids.
33. In areas where geological conditions lead to high levels of boron in groundwater and the main source of water of the water supply system concerned is groundwater, a limit value of 2,4 mg / l shall apply.
C. Indicators with a defined guide value
| č. | ukazatel | jednotka | směrná hodnota | vysvětlivky |
|---|---|---|---|---|
| 1 | 17-beta-estradiol | ng/l | 1 | |
| 2 | nonylfenol | ng/l | 300 | |
| 3 | PFOA, PFNA, PFHxS a PFOS suma | μg/l | 0,010 | 1 |
| 4 | chloridazon-desphenyl (CAS 6339-19-1) | μg/l | 3 | 2, 3 |
| 5 | chloridazon-desphenyl-methyl (CAS 17254-80-7) | μg/l | 3 | 2, 3 |
| 6 | metazachlor ESA (CAS 172960-62-2) | μg/l | 2,5 | 4 |
| 7 | metazachlor OA (CAS 1231244-60-2) | μg/l | 2,5 | 4 |
| 8 | alachlor ESA (CAS 142363-53-9) | μg/l | 0,5 | 5 |
| 9 | alachlor OA (CAS 171262-17-2) | μg/l | 0,5 | 5 |
| 10 | atrazin-2-hydroxy (CAS 2163-68-0) | μg/l | 1 | 6 |
| 11 | 2,6-dichlorbenzamid (CAS 2008-58-4) | μg/l | 1,5 | 7 |
| 12 | dimethachlor ESA (CASID 30748) | μg/l | 3 | 8 |
| 13 | dimethachlor OA (CAS 1086384-49-7) | μg/l | 3 | 8 |
| 14 | dimethachlor CGA (CAS 1418095-08-5) | μg/l | 3 | 8 |
| 15 | ostatní nerelevantní metabolity pesticidních látek | μg/l | 0,5 | 9 |
Explanatory note:
1. The limit value refers to the sum of quantified concentrations of PFOA, PFNA, PFHxS and PFOS. If the substance is not quantitatively detected, zero is added to the sum. If all four substances in the sum indicator are below the limit of determination, the result is expressed as 0 in this case. All 4 individual substances must also be indicated on the laboratory report in addition to the sum.
2. The limit applies simultaneously to the sum of the substances chloridazon-desphenyl and chloridazon-desphenyl-methyl. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
3. The limit value shall be provided that the parent substance chloridazon is less than 0,1 μg / l. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
4. The limit value applies provided that the parent substance level of metazachlor is less than 0,1 μg / l. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
5. The limit value applies provided that the parent substance alachlor is less than 0,1 μg / l. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
6. The limit value applies provided that the parent substance value of atrazine is less than 0,1 μg / l. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
7. The limit value shall be provided that the value of each parent substance (dichlorobenzil and flupicolide) is less than 0,1 μg / l. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
8. The limit value shall be provided that the parent substance dimethachlor is less than 0,1 μg / l and the sum of the non-relevant metabolites of dimethachlor less than 6 μg / l. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
9. The limit value applies when the pesticide metabolite is assessed by the Ministry of Health as not relevant for drinking water at the time of detection.
D. Indicators with a defined reference value
| č. | ukazatel | jednotka | referenční hodnota | vysvětlivky |
|---|---|---|---|---|
| 1 | somatické kolifágy | PTJ/100 ml | 50 (v případě surové vody) | 1 |
Abstract used: PTJ - plaque forming unit
Explanatory note:
This indicator shall be established if the assessment and risk management of the drinking water supply system indicates that somatic coaliphages may occur in raw water. If the presence in raw water is detected at a concentration of > 50 PTJ / 100 ml, the analysis should be performed after all steps of the treatment, in order to determine the log value by means of existing barriers and to assess whether the risk of pathogen virus penetration through the treatment is sufficiently controlled.
Příloha č. 2
Annex No 2 to Decree No 252 / 2004 Coll.
Microbiological, biological, physical, chemical and organoleptic hot water indicators pursuant to § 3 (3) of the Act and their hygiene limits
| č. | ukazatel | zkratka | jednotka | limit | typ limitu | vysvětlivky | |
|---|---|---|---|---|---|---|---|
| teplá voda vyrobená z pitné vody | teplá voda vyrobená z jiné vody než z vody pitné | ||||||
| 1 | Legionella spp. | KTJ/100 ml | 100 | 100 | MH | 1,2,3 | |
| 2 | Legionella spp. | KTJ/100 ml | 0 | 0 | NMH | 1,4 | |
| 3 | počty kolonií při 36°C | KTJ/ml | 200 | 200 | MH | 1 | |
| 4 | Escherichia coli | KTJ/100 ml | - | 0 | NMH | 1 | |
| 5 | Pseudomonas aeruginosa | KTJ/100 ml | - | 0 | MH | 1 | |
| 6 | atypická mykobakteria | KTJ/1000 ml | - | 100 | MH | 1,5 | |
| 7 | barva | mg/l Pt | 20 | - | MH | 1 | |
| 8 | celkový organický uhlík | TOC | mg/l | 5,0 | 5,0 | MH | 1,6 |
| 9 | chemická spotřeba kyslíku (manganistanem) | CHSK-Mn | mg/l | 3,0 | 5,0 | MH | 1,7 |
| 10 | chlor volný | mg/l | 1,0 | 1,0 | MH | 1,8 | |
| 11 | fosforečnany | mg/l | 3,5 | 3,5 | MH | 1,9 | |
| 12 | oxid chloričitý | mg/l | 0,8 | 0,8 | MH | 1,8 | |
| 13 | pach | přijatelný pro odběratele | přijatelný pro odběratele | MH | 1,10 | ||
| 14 | pH | pH | 6,5 - 9,5 | 6,0 - 9,5 | MH | 1,11 | |
| 15 | teplota | °C | 55 | 55 | DH | 1,12 | |
| 16 | trihalomethany | THM | μg/l | 50 | 50 | NMH | 1,13 |
| 17 | zákal | ZF(n) | 5 | 5 | MH | 1,14 | |
Explanatory notes:
1. Sampling for the determination of hot water indicators (excluding targeted epidemiological investigations) shall be carried out after the water has been forgiven for 1 minute.
2. The limit as a limit applies to health care facilities, social services facilities in which residence services are provided and accommodation facilities, hot water delivered to showers of artificial or natural swimming pools and to drinking water used for the production of hot water; for other objects, it shall be the recommended value to be pursued by means of technical measures.
3. The limit value is determined for the purposes of § 3b.
4. The limit as the highest limit applies to the separation of hospitals where immunocompromised patients are located, such as transplant, premature, anesthesioreresuscitation, dialysis, oncology, haematooncology, intensive care units.
5. The limit value refers to the sum of the following types of atypical mycobacteria: Mycobacterium chelonae, M. kansasii, M. avium, M. intracellulare, M. crophulaceum, M. xenopi, M. fortuitum. The indicator shall be determined only in the case of the production of hot water from a source of surface water or mine water and with central heating and distribution. Central heating means heating water in one place for the whole building or more buildings.
6. The indicator does not need to be determined when the CHSK- Mn content (chemical oxygen consumption) is determined.
7. The indicator does not need to be determined when the TOC content (total organic carbon) is determined.
8. It shall not apply to controlled shock disinfection, where higher doses of disinfectant can be used, provided that, by means of organisational measures, the water thus treated is not used for human consumption (drinking and bathing). The free chlorine and chloride dioxide content is only determined when these substances are used in water treatment.
9. Expressed as PO43. The indicator is determined only if a phosphorus-based chemical is added to the hot water.
10. In case of doubt in sensory determination, threshold numbers 1 and 2 are considered acceptable in the determination according to ČSN EN 1622 Water quality. Determination of the odour threshold number (TON) and taste threshold number (TFN).
11. For water with naturally lower pH, pH values of 6,0 to 6,5 shall be considered as complying with the requirements of this Decree provided that the water does not act aggressively against the materials of the distribution system, including the internal tap.
12. The temperature of hot water should not fall below 50 ° C (preferably above 55 ° C) after unturning to minimise the development of legionels in the water supply.
13. The limit applies to the sum of quantitatively identified concentrations of trichloromethane (chloroform), tribromomethane (bromoform), dibromochloromethane and bromodichloromethane. If possible, without reducing the effectiveness of the disinfectant, the lowest possible level shall be achieved. The indicator shall be determined only if the water is disinfected with the chlorine preparation.
14. A non-phelometric method shall be used for the determination of opacity.
Příloha č. 3
Annex 3 to Decree No 252 / 2004 Coll.
Microbiological, biological, physical, chemical and organoleptic hot water indicators produced from an individual source for the personal hygiene of workers and their hygiene limits
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Regulation Information
| Citation | Decree No. 252 / 2004 Coll., laying down the hygiene requirements for drinking and hot water and the frequency and scope of control of drinking water |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 30.04.2004 |
|---|---|
| Effective from | 01.05.2004 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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