Regulations 4, 10, 15 and 17
| Parameters | Maximum concentration or value | Units of Measurement |
|---|---|---|
| Escherichia coli (E. coli) | 0 | Number/100ml |
| Enterococci | 0 | Number/100ml |
| In the case of water in bottles or containers: | ||
| Escherichia coli (E.coli) | 0 | Number/250ml |
| Enterococci | 0 | Number/250ml |
| Pseudomonas aeruginosa | 0 | Number/250ml |
| Colony count 22°C | 100 | Number/ml |
| Colony count 37°C | 20 | Number/ml |
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 the nitrate-nitrite formula in regulation 4(c). | ||
3 For these purposes “Pesticides” means:
related products (inter alia, growth regulators) and their relevant metabolites, degradation and reaction products. Only those pesticides likely to be present in a given supply need be monitored. | ||
4 “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process. | ||
5
| ||
6 The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | ||
7
| ||
| Parameters | Maximum concentration or value | Units of Measurement |
|---|---|---|
| Acrylamide 1 | 0.10 | μg/l |
| Antimony | 5.0 | μg/l |
| Arsenic | 10 | μg/l |
| Benzene | 1.0 | μg/l |
| Benzo(a)pyrene | 0.010 | μg/l |
| Boron | 1.0 | mg/l |
| Bromate | 10 | μg/l |
| Cadmium | 5.0 | μg/l |
| Chromium | 50 | μg/l |
| Copper | 2.0 | mg/l |
| Cyanide | 50 | μg/l |
| 1, 2 dichloroethane | 3.0 | μg/l |
| Epichlorohydrin 1 | 0.10 | μg/l |
| Fluoride | 1.5 | mg/l |
| Lead | 25 (until 25th December 2013) | μg/l |
| 10 (from 25th December 2013) | μg/l | |
| Mercury | 1.0 | μg/l |
| Nickel | 20 | μg/l |
| Nitrate 2 | 50 | mg/l |
| Nitrite2 | 0.5 (or 0.1 in the case of treatment works) | mg/l |
| Pesticides 3— | ||
Aldrin | 0.030 | μg/l |
Dieldrin | 0.030 | μg/l |
Heptachlor | 0.030 | μg/l |
Heptachlor epoxide | 0.030 | μg/l |
Other pesticides | 0.10 | μg/l |
Pesticides total 4 | 0.50 | μg/l |
| Polycyclic aromatic hydrocarbons 5 | 0.10 | μg/l |
| Selenium | 10 | μg/l |
| Tetrachloroethene and Trichloroethene 6 | 10 | μg/l |
| Trihalomethanes: Total 7 | 100 | μg/l |
| Vinyl chloride 1 | 0.50 | μg/l |
| Parameters | Maximum concentration or value | Units of Measurement |
|---|---|---|
| Aluminium | 200 | μg/l |
| Colour | 20 | mg/l Pt/Co |
| Iron | 200 | μg/l |
| Manganese | 50 | μg/l |
| Odour | Acceptable to consumers and no abnormal change | |
| Sodium | 200 | mg/l |
| Taste | Acceptable to consumers and no abnormal change | |
| Tetrachloromethane | 3 | μg/l |
| Turbidity | 4 | NTU |
1 The water should not be aggressive. | ||
| F1. . . | ||
3 Only in the case of surface water or groundwater that has been influenced by surface water. | ||
| Parameters | Maximum concentration or value or state (unless otherwise stated) | Units of measurement |
|---|---|---|
| Ammonium | 0.50 | mg/l |
| Chloride 1 | 250 | mg/l |
| Clostridium perfringens | 0 | Number/100ml |
| (including spores) | ||
| Coliform bacteria | 0 | Number/100ml (Number/250ml in the case of water put into bottles or containers) |
| Colony counts | No abnormal change | Number/ml at 22°C |
| No abnormal change | Number/ml at 37°C | |
| Conductivity 1 | 2500 | μS/cm at 20°C |
| Hydrogen ion | 9.5 (maximum) | pH value |
| 6.5 (minimum) (in the case of still water put into bottles or containers the minimum is 4.5) | pH value | |
| Sulphate 1 | 250 | mg/l |
| F2. . . | F2. . . | F2. . . |
| Total organic carbon (TOC) | No abnormal change | mgC/l |
| F3. . . | F3. . . | F3. . . |
| Turbidity3 | 1 | NTU |
Textual Amendments
F1Words in Sch. 1 Pt. 2 omitted (14.4.2016) by virtue of The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 4(c)
F2Words in Sch. 1 Pt. 2 omitted (14.4.2016) by virtue of The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 4(a)
F3Words in Sch. 1 Pt. 2 omitted (14.4.2016) by virtue of The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 4(b)
Textual Amendments
F4Sch. 1 Pt. 3 inserted (14.4.2016) by The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), reg. 1(1), Sch. 1
(i) Enforcement action by the local authority is deemed justified on radiological protection grounds without further consideration where radon concentrations exceed 1,000 Bq/1. | |||
(ii) If tritium concentration exceeds its parametric value, an investigation (which may include analysis) of the presence of artificial radionuclides must be carried out.] | |||
| Parameters | Maximum concentration or value | Units of measurement | |
|---|---|---|---|
| Indicative dose (for radioactivity) | 0,10 | mSv | |
| Radon | 100 | Bq/1 | |
| Tritium (for radioactivity) | 100 | Bq/l | |
Regulation 9
1.—(1) A local authority must undertake check monitoring in accordance with this Part.
(2) Check monitoring means sampling for each parameter listed in Table 1 in the circumstances listed in that table in order—
(a)to determine whether or not water complies with the concentrations or values in Schedule 1;
(b)to provide information on the organoleptic and microbiological quality of the water; and
(c)to establish the effectiveness of the treatment of the water, including disinfection.
| Parameter | Circumstances |
|---|---|
| Aluminium | When used as flocculant or where the water originates from, or is influenced by, surface waters |
| Ammonium | In all supplies |
| Clostridium perfringens (including spores) waters | Where the water originates from, or is influenced by, surface |
| Coliform bacteria | In all supplies |
| Colony counts | In all supplies |
| Colour | In all supplies |
| Conductivity | In all supplies |
| Escherichia coli (E. coli) | In all supplies |
| Hydrogen ion concentration | In all supplies |
| Iron | When used as flocculant or where the water originates from, or is influenced by, surface waters |
| Manganese | Where the water originates from, or is influenced by, surface waters |
| Nitrate | When chloramination is practised |
| Nitrite | When chloramination is practised |
| Odour | In all supplies |
| Pseudomonas aeruginosa | Only in the case of water in bottles or containers |
| Taste | In all supplies |
| Turbidity | In all supplies |
2.—(1) Sampling must be carried out at frequencies specified in Table 2.
| Volume m3/day | Sampling frequency per year |
|---|---|
| ≤ 10 | 1 |
| > 10 ≤ 100 | 2 |
| > 100 ≤ 1,000 | 4 |
| > 1,000 ≤ 2,000 | 10 |
| > 2,000 ≤ 3,000 | 13 |
| > 3,000 ≤ 4,000 | 16 |
| > 4,000 ≤ 5,000 | 19 |
| > 5,000 ≤ 6,000 | 22 |
| > 6,000 ≤ 7,000 | 25 |
| > 7,000 ≤ 8,000 | 28 |
| > 8,000 ≤ 9,000 | 31 |
| > 9,000 ≤ 10,000 | 34 |
| > 10,000 | 4 + 3 for each 1,000 m3/day of the total volume (rounding up to the nearest multiple of 1,000 m3/day) |
(2) The local authority may reduce the frequency of sampling for a parameter to a frequency not less than half if—
(a)the local authority is of the opinion that the quality of water in the supply is unlikely to deteriorate;
(b)in the case of hydrogen ion the parameter has had a pH value that is not less than 6.5 and not more than 9.5; and
(c)in all other cases, in each of two successive years the results of samples taken for the purposes of monitoring the parameter in question are constant and significantly lower than the concentrations or values laid down in Schedule 1.
(3) The local authority may set a higher frequency for any parameter if it considers it appropriate taking into account the findings of any risk assessment, and in addition may monitor anything else identified in the risk assessment.
(4) Notwithstanding the provisions in sub-paragraph (2) above, there must be a minimum of 1 sample per year.
3.—(1) A local authority must undertake audit monitoring in accordance with this Part.
(2) Audit monitoring means sampling for each parameter listed in [F5Part 1 or 2 of] Schedule 1 (other than parameters already being sampled under check monitoring) in order to provide information necessary to determine whether or not the private supply satisfies each concentration, value or state specified in [F6either of those Parts of] that Schedule and, if disinfection is used, to check that disinfection by-products are kept as low as possible without compromising the disinfection.
(3) The local authority may, for such time as it may decide, exclude a parameter from the audit monitoring of a private supply—
(a)if it considers that the parameter in question is unlikely to be present in the supply or system at a concentration or value that poses a risk of the private supply failing to meet the concentration, value or state specified in [F7Part 1 or 2 of] Schedule 1 in respect of that parameter;
(b)taking into account the findings of any risk assessment; and
(c)taking into account any guidance issued by the Welsh Ministers.
(4) It may monitor anything else identified in the risk assessment.
Textual Amendments
F5Words in Sch. 2 para. 3(2) inserted (14.4.2016) by The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 6(a)(i)
F6Words in Sch. 2 para. 3(2) inserted (14.4.2016) by The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 6(a)(ii)
F7Words in Sch. 2 para. 3(3)(a) inserted (14.4.2016) by The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 6(b)
4.—(1) Sampling must be carried out at the frequencies specified in Table 3.
| Volume m3/day | Sampling frequency per year |
|---|---|
| ≤ 10 | 1 |
| > 10 ≤ 3,300 | 2 |
| > 3,300 ≤ 6,600 | 3 |
| > 6,600 ≤ 10,000 | 4 |
| > 10,000 ≤ 100,000 | 3 + 1 for each 10,000 m3/day of the total volume (rounding up to the nearest multiple of 10,000 m3/day) |
| > 100,000 | 10 + 1 for each 25,000 m3/day of the total volume (rounding up to the nearest multiple of 25,000 m3/day) |
(2) The local authority may set a higher frequency for any parameter if it considers it appropriate taking into account the findings of any risk assessment.
1 The volumes are calculated as averages taken over a calendar year. | ||
| Volume1 of water produced in bottles or containers each day (m3) | 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/day of the total volume (rounding up to the nearest multiple of 5 m3/day) | 1 for each 100 m3/day of the total volume (rounding up to the nearest multiple of 100 m3/day) |
Regulation 10A
Textual Amendments
F8Sch. 2A inserted (14.4.2016) by The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), reg. 1(1), Sch. 2
1.—(1) In relation to the radon parameter in the radioactive substances parameters table, a local authority—
(a)must ensure that a representative survey is carried out in accordance with sub-paragraph (2) to determine the likelihood of a supply failing to comply with the relevant parametric concentration or value specified in the radioactive substances parameters table; and
(b)must carry out monitoring where there is reason to believe, on the basis of the results of the representative surveys or other reliable information, including any risk assessment carried out in accordance with regulation 6, that the parametric value for the radon parameter laid down in the radioactive substances parameters table might be exceeded.
(2) A representative survey must be designed in such a way—
(a)as to be capable of determining the scale and nature of likely exposure to radon in water intended for human consumption originating from different types of groundwater sources and wells in different geological areas; and
(b)that underlying parameters, especially the geology and hydrology of the area, radioactivity of rock or soil, and well type, can be identified and used to direct further action to areas of likely high exposure.
2.—(1) In relation to the tritium parameter in the radioactive substances parameters table, a local authority—
(a)must carry out monitoring where an anthropogenic source of tritium or other artificial radionuclides is present within the catchment area and it cannot be shown on the basis of other surveillance programmes or investigations, including any risk assessment carried out in accordance with regulation 6, that the level of tritium is below the parametric value listed in the radioactive substances parameters table; and
(b)must carry out an investigation of the presence of other artificial radionuclides if the concentration of tritium exceeds the parametric value listed in the radioactive substances parameters table.
(2) Where monitoring is required by sub-paragraph (1)—
(a)it must be carried out at the frequencies as set out for audit monitoring in Table 3 in Part 2 of Schedule 2; or
(b)it must (in the case of a private water supply falling within the scope of regulation 10(1)) be carried out at least every five years or more frequently if the risk assessment referred to under sub-paragraph (1)(a) shows this to be necessary.
3.—(1) In relation to the indicative dose (“ID”) parameter in the radioactive substances parameters table, a local authority must carry out monitoring where a source of artificial radioactivity or elevated natural radioactivity is present and it cannot be shown on the basis of other surveillance programmes or investigations, including any risk assessment carried out in accordance with regulation 6, that the level of ID is below the parametric value listed the radioactive substances parameters table.
(2) Where monitoring is required by sub-paragraph (1) in relation to artificial radionuclides—
(a)it must be carried out at the frequencies as set out for audit monitoring in Table 3 in Part 2 of Schedule 2;
(b)it must (in the case of a private water supply falling within the scope of regulation 10(1)) be carried out at least every five years and more frequently if the risk assessment shows this to be necessary.
(3) Where monitoring is required by sub-paragraph (1) in relation to a source of elevated natural radioactivity—
(a)the local authority—
(i)may decide the frequency of monitoring in its area depending on the screening strategy adopted by the authority; and
(ii)must notify the Welsh Ministers in writing of its decision under sub-paragraph (i); and
(b)the frequency of monitoring decided under sub-paragraph (a)(i) may vary from a single check measurement to the frequencies as set out for audit monitoring in Table 3 in Part 2 of Schedule 2.
(4) Where a local authority decides under sub-paragraph (3) that a single check measurement for natural radioactivity is appropriate, the local authority must carry out a further check if any change occurs in relation to the supply which is likely to influence the concentrations of radionuclides in the supply.
4. Where treatment to reduce the level of radionuclides in a private water supply has been undertaken, the local authority must monitor the supply for total indicative dose, radon and tritium in accordance the provisions of this Part and the frequencies as set out for audit monitoring in Table 3 in Part 2 of Schedule 2 to verify the continued efficacy of that treatment.
5. Where a parametric value in the radioactive substances parameters table is exceeded in relation to a particular sample taken by a local authority, the Welsh Ministers must specify, by notice in writing to the local authority, the extent of resampling necessary to ensure that the measured values are representative of an average activity concentration for a full year.]
Regulation 11
1.—(1) The local authority must ensure that each sample is—
(d)taken by a competent person using suitable equipment;
(e)representative of the water at the sampling point at the time of sampling;
(f)not contaminated in the course of being taken;
(g)kept at such temperature and in such conditions as will secure that there is no material change in what is to be measured; and
(h)analysed without delay by a competent person using suitable equipment.
(2) It must ensure that the sample is analysed using a system of analytical quality control.
(3) The system must be subjected to checking by a person who is—
(a)not under the control of either the analyst or the local authority; and
(b)approved by the Welsh Ministers for that purpose.
2.—(1) The local authority must ensure that each sample is analysed in accordance with this paragraph.
(2) For each parameter specified in the first column of Table 1 in Part 2 of this Schedule the method of analysis is specified in the second column of that table.
(3) For each parameter specified in the first column of Table 2 in Part 2 of this Schedule the method is one that is capable of—
(a)measuring concentrations and values with the trueness and precision specified in the second and third columns of that table, and
(b)detecting the parameter at the limit of detection specified in the fourth column of that table.
(4) For hydrogen ion, the method of analysis must be capable of measuring a value with a trueness of 0.2 pH unit and a precision of 0.2 pH unit.
(5) The method of analysis used for odour and taste parameters must be capable of measuring values equal to the parametric value with a precision of 1 dilution number at 25°C.
(5) For these purposes—
“limit of detection” is —
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;
“precision” (the random error) is twice the standard deviation (within a batch and between batches) of the spread of results about the mean;
“trueness” (the systematic error) is the difference between the mean value of the large number of repeated measurements and the true value.
3.—(1) The Welsh Ministers may authorise a method different from that set out in paragraph 2(2) if satisfied that it is at least as reliable.
(2) An authorisation may be time-limited and may be revoked at any time.
4.—(1) A local authority may enter into an arrangement for any person to take and analyse samples on its behalf.
(2) A local authority must not enter into an arrangement under paragraph (1) unless—
(a)it is satisfied that the task will be carried out promptly by a person competent to perform it, and
(b)it has made arrangements that ensure that any breach of these Regulations is communicated to it immediately, and any other result is communicated to it within 28 days.
| Parameter | Method |
|---|---|
| Clostridium perfringens (including spores) | Membrane filtration followed by anaerobic incubation of the membrane on m-CP agar* 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. |
| Coliform bacteria | BS-EN ISO 9308-1 |
| Colony count 22°C — enumeration of culturable microorganisms | BS-EN ISO 6222 |
| Colony count 37°C — enumeration of culturable microorganisms | BS-EN ISO 6222 |
| Enterococci BS-EN ISO 7899-2 | |
| Escherichia coli (E. coli) | BS-EN ISO 9308-1 |
| Pseudomonas aeruginosa | BS-EN-ISO 12780 |
Use the following method to make m-CP agar :
Make a basal medium consisting of—
| Tryptose | 30.0g |
| Yeast extract | 20.0g |
| Sucrose | 5.0g |
| L-cysteine hydrochloride | 1.0g |
| MgSO4.7H2O | 0.1g |
| Bromocresol purple | 40.0mg |
| Agar | 15.0g |
| Water | 1,000.0ml |
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.
Dissolve—
| D-cycloserine | 400.0mg |
| Polymyxine-B sulphate | 25.0mg |
| Indoxyl-β-D-glucoside | 60.0mg |
into 8ml sterile water and add it to the medium.
Add to the medium—
| Filter-sterilised 0.5% phenolphthalein diphosphate solution | 20.0ml |
| Filter-sterilised 4.5% FeCl3.6H2O | 2.0ml |
Notes: | |||
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 I of Table B in Schedule 1. | |||
4 The performance characteristics apply to the individual substances specified at 50% of the parametric value in Part I of Table B in Schedule 1. | |||
5 The performance characteristics apply to the prescribed value of 4 NTU. | |||
6 The performance characteristics apply to the specification of 1 NTU for surface waters or ground waters influenced by surface water. | |||
| Parameters | Trueness % of prescribed concentration or value or specification | Precision % of prescribed concentration or value or specification | Limit of detection % of prescribed concentration or value or specification |
|---|---|---|---|
| Aluminium | 10 | 10 | 10 |
| Ammonium | 10 | 10 | 10 |
| Antimony | 25 | 25 | 25 |
| Arsenic | 10 | 10 | 10 |
| Benzene | 25 | 25 | 25 |
| Benzo(a)pyrene | 25 | 25 | 25 |
| Boron | 10 | 10 | 10 |
| Bromate | 25 | 25 | 25 |
| Cadmium | 10 | 10 | 10 |
| Chloride | 10 | 10 | 10 |
| Chromium | 10 | 10 | 10 |
| Colour | 10 | 10 | 10 |
| Conductivity | 10 | 10 | 10 |
| Copper | 10 | 10 | 10 |
| Cyanide 1 | 10 | 10 | 10 |
| 1,2-dichloroethane | 25 | 25 | 10 |
| 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 |
| Pesticides and related products 2 | 25 | 25 | 25 |
| Polycyclic aromatic hydrocarbons 3 | 25 | 25 | 25 |
| Selenium | 10 | 10 | 10 |
| Sodium | 10 | 10 | 10 |
| Sulphate | 10 | 10 | 10 |
| Tetrachloroethene 4 | 25 | 25 | 10 |
| Tetrachloromethane | 20 | 20 | 20 |
| Trichloroethene 4 | 25 | 25 | 10 |
| Trihalomethanes: | |||
| Total 3 | 25 | 25 | 10 |
| Turbidity 5 | 10 | 10 | 10 |
| Turbidity 6 | 25 | 25 | 25 |
Textual Amendments
F9Sch. 3 Pt. 3 inserted (14.4.2016) by The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), reg. 1(1), Sch. 3
5. A local authority may use reliable screening strategies to indicate the presence of radioactivity in water intended for human consumption.
6. The strategies referred to in paragraph 5 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).
7. If one of the activity concentrations exceeds 20% of the corresponding derived value or the tritium concentration exceeds its parametric value listed in Part 3 of Schedule 1 an analysis of additional radionuclides is required.
8. A local authority must, in deciding which radionuclides require to be measured for each supply, take into account all relevant information about likely sources of radioactivity.
9. Subject to paragraph 10 the recommended screening values are–
(a)0,1Bq/l for gross alpha activity; and
(b)1,0Bq/l for gross beta activity.
10. If the gross alpha activity exceeds 0,1Bq/l or the gross beta activity exceeds 1,0Bq/l, analysis for specific radionuclides is required.
11. The Welsh Ministers may set alternative screening levels for gross alpha activity and gross beta activity where it can be demonstrated by the local authority that the alternative levels are in compliance with an indicative dose of 0,1 mSv.
12. The radionuclides to be measured must be based on all relevant information about likely sources of radioactivity.
12. The indicative dose must be calculated from–
(a)the measured radionuclide concentrations and the dose coefficients laid down in Annex III, Table A of Directive 96/29/Euratom; or
(b)more recent information recognised by the Welsh Ministers, on the basis of the annual intake of water (730 1 for adults).
13. 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) = observed concentration of radionuclide i
Ci(der) = derived concentration of radionuclide i
n = number of radionuclides detected.
(1) This table includes values for the most common natural and artificial radionuclides; these are precise values, calculated for a dose of 0,1 mSv, an annual intake of 730 litre and using the dose coefficients laid down in Annex III, Table A of Directive 96/29/ 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. | ||
(2) This table allows only for the radiological properties of uranium, not for its chemical toxicity. | ||
| Origin | Nuclide | Derived concentration |
|---|---|---|
| Natural | U-238 | 3,0 Bq/1 |
| U-234 | 2,8 Bq/1 | |
| Ra-226 | 0,5 Bq/1 | |
| Ra-228 | 0,2 Bq/1 | |
| Pb-210 | 0,2 Bq/1 | |
| Po-210 | 0,1 Bq/1 | |
| Artificial | C-14 | 240 Bq/1 |
| Sr-90 | 4,9 Bq/1 | |
| Pu-239/Pu-240 | 0,6 Bq/1 | |
| Am-241 | 0,7 Bq/1 | |
| Co-60 | 40 Bq/1 | |
| Cs-134 | 7,2 Bq/1 | |
| Cs-137 | 11 Bq/1 | |
| 1-131 | 6,2 Bq/1 | |
14. 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:
(Note 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. | ||
(Note 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. | ||
(Note 3) The limit of detection for tritium and for radon is 10% of its parametric value of 100 Bq/1. | ||
(Note 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. | ||
(Note 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.] | ||
| Parameters and radionuclides | Limit of detection | Notes |
|---|---|---|
| Tritium | 10 Bq/1 | |
| Radon | 10 Bq/1 | |
| gross alpha | 0,04 Bq/1 | |
| gross beta | 0,4 Bq/1 | |
| U-238 | 0,02 Bq/1 | |
| U-234 | 0,02 Bq/1 | |
| Ra-226 | 0,04 Bq/1 | |
| Ra-228 | 0,02 Bq/1 | |
| Pb-210 | 0,02 Bq/1 | |
| Po-210 | 0,01 Bq/1 | |
| C-14 | 20 Bq/1 | |
| Sr-90 | 0,4 Bq/1 | |
| Pu-239/Pu-240 | 0,04 Bq/1 | |
| Am-241 | 0,06 Bq/1 | |
| Co-60 | 0,5 Bq/1 | |
| Cs-134 | 0,5 Bq/1 | |
| Cs-137 | 0,5 Bq/1 | |
| I-131 | 0,5 Bq/1 | |
Regulations 12 and 13
1.—(1) A local authority must, before [ ], record the number of private supplies in its area, and for each supply must record—
(a)the name of the supply, together with a unique identifier;
(b)the type of source;
(c)the geographical location using a grid reference;
(d)an estimate of the number of people supplied;
(e)an estimate of the average daily volume of water supplied in cubic metres;
(f)the type of premises supplied;
(g)detail of any treatment process, together with its location;
F10(h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(2) It must review and update the record at least once a year.
(3) It must keep the record for at least 30 years.
Textual Amendments
F10Sch. 4 para. 1(1)(h) omitted (1.4.2013) by virtue of The National Treatment Agency (Abolition) and the Health and Social Care Act 2012 (Consequential, Transitional and Saving Provisions) Order 2013 (S.I. 2013/235), art. 1(2), Sch. 2 para. 142(3)
2.—(1) For each supply it must record, within 28 days of each of the following taking place—
(a)a plan and description of the supply;
(b)the monitoring programme for the supply;
(c)the risk assessment;
(d)the date, results and location of any sampling and analysis relating to that supply, and the reason for taking the sample;
(e)the results of any investigation undertaken in accordance with these Regulations;
(f)any authorisation;
(g)any notices served under section 80 of the Water Industry Act 1991, or regulation 18;
(h)any action agreed to be taken by any person under these Regulations;
(i)any request for the local authority to carry out sampling and analysis, undertake a risk assessment or give advice;
(j)a summary of any advice given in relation to the supply.
(2) It must keep the risk assessment and records of sampling and analysis for at least thirty years, and all other records under this paragraph for at least five years.
Regulation 21
1. The local authority may charge a fee, payable on invoice, for the activities in the following table, and the fee is the reasonable cost of providing the service subject to the following maximum amounts.
1 No fee is payable where a sample is taken and analysed solely to confirm or clarify the results of the analysis of a previous sample. | |
| Service | Maximum fee (£) |
|---|---|
| Risk assessment (each assessment): | 500 |
| Sampling (each visit) 1: | 100 |
| Investigation (each investigation): | 100 |
| Granting an authorisation (each authorisation): | 100 |
| Analysing a sample— | |
taken under regulation 10: | 25 |
taken during check monitoring: | 100 |
taken during audit monitoring: | 500 |
2.—(1) Any person requesting anything under these Regulations is liable for the cost.
(2) Otherwise fees are payable, as specified in the invoice, by the relevant person as defined in section 80(7) of the Water Industry Act 1991.
(3) Where more than one person is liable, in determining who is required to make payment the local authority—
(a)may apportion the charge between them; and
(b)must have regard to any agreement or other document produced to the local authority relating to the terms on which water is supplied.