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Regulations 4, 9 and 11
Prescribed concentrations or values
Textual Amendments
F1Words in Sch. 1 Pt. 1 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(a)(ii) (with reg. 3)
F2Words in Sch. 1 Pt. 1 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(a)(i) (with reg. 3)
Part I: Directive requirements - prescribed concentration or values
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— For these purposes, “pesticides” means—
| ||
4 “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process. | ||
5 The specified compounds are—
| ||
6 The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | ||
7 The specified compounds are—
| ||
Parameters | Maximum concentration or value | Units of measurement |
---|---|---|
Acrylamide1 | 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 |
Epichlorohydrin1 | 0.10 | μg/l |
Fluoride | 1.5 | mg/l |
Lead | 10 | μg/l |
Mercury | 1.0 | μg/l |
Nickel | 20 | μg/l |
Nitrate2 | 50 | mg/l |
Nitrite2 | 0.5 (or 0.1 in the case of treatment works) | mg/l |
Pesticides3— | ||
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 total4 | 0.50 | μg/l |
Polycyclic aromatic hydrocarbons5 | 0.10 | μg/l |
Selenium | 10 | μg/l |
Tetrachloroethene and Trichloroethene6 | 10 | μg/l |
Trihalomethanes: Total7 | 100 | μg/l |
Vinyl chloride1 | 0.50 | μg/l |
Part II: National requirements – prescribed concentrations or values | ||
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. | ||
2 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 |
Chloride1 | 250 | mg/l |
Clostridium perfringens (including spores) | 0 | Number/100ml |
Number/100ml (Number/250 | ||
Coliform bacteria | 0 | ml in the case of water put into bottles of containers) |
F3. . . | F4. . . | |
Colony counts | No abnormal change | Number/ml at [F522°C] |
Conductivity1 | 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 | |
Sulphate1 | 250 | mg/l |
Total organic carbon (TOC) | No abnormal change | mgC/l |
Turbidity2 | 1 | NTU |
Textual Amendments
F3Words in Sch. 1 Pt. 2 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(b)(i)(aa) (with reg. 3)
F4Words in Sch. 1 Pt. 2 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(b)(i)(bb) (with reg. 3)
F5Word in Sch. 1 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(b)(ii) (with reg. 3)
1 Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken, monitoring must be carried out under Part 1 of Schedule 2 to ensure the continued efficacy of the treatment. | ||
2 Enforcement action by a local authority is deemed justified on radiological protection grounds without further consideration where randon concentrates exceed 1,000 Bq/1. | ||
3 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 or state (unless otherwise stated) | Units of measurements |
---|---|---|
Indicative dose (for radioactivity1 | 0.10 | mSv |
Gross alpha | 0.1 | Bq/1 |
Gross beta | 1.0 | Bq/1 |
Radon2 | 100 | Bq/1 |
Tritium (for radioactivity)3 | 100 | Bq/1 |
Regulation 9
Textual Amendments
F6Sch. 2 Pts. 1-2A substituted for Sch. 2 Pts. 1-2 (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(10)(a) (with reg. 3)
1.—(1) A local authority must monitor for a Group A parameter in accordance with this Part and Part 2A.
(2) In this Schedule, “monitoring for a Group A parameter” means sampling for each parameter listed in Column 1 of Table 1 in the circumstances listed in the entry which corresponds with that parameter in Column 2 of Table 1 in order to—
(a)determine whether or not the water complies with the concentrations or values in Schedule 1;
(b)provide information on the organoleptic and microbiological quality of the water; and
(c)establish the effectiveness of the treatment of the water, including disinfection.
Parameter | Circumstances |
---|---|
Aluminium | Where used as a water treatment chemical or where the water originates from, or is influenced by, surface waters |
Ammonium | Where chloramination is practised |
Coliform bacteria | In all supplies |
Colony counts 22°C | In all supplies |
Colour | In all supplies |
Conductivity | In all supplies |
E. coli | In all supplies |
Hydrogen ion | In all supplies |
Iron | Where used as a water treatment chemical 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 | Where chloramination is practised |
Nitrite | Where chloramination is practised |
Odour | In all supplies |
Taste | In all supplies |
Turbidity | In all supplies |
2. Monitoring for a Group A parameter must be undertaken at the 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 1,000m3/day of the total volume (rounding up to the nearest multiple of 1,000m3/day) |
3.—(1) A local authority must monitor for a Group B parameter in accordance with this Part and Part 2A.
(2) In this Schedule, “monitoring for a Group B parameter” means sampling for each parameter listed in Parts 1 and 2 of Schedule 1 (other than Group A parameters already being sampled under Part 1 of this Schedule)—
(a)in order to provide information necessary to determine whether or not the private water supply satisfies each concentration, value or state prescribed in those Parts of that Schedule; and
(b)if disinfection is used, in order to check that disinfection by-products are kept as low as possible without compromising the effectiveness of disinfection.
4. Monitoring for a Group B parameter must be undertaken 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 10,000m3/day of the total volume (rounding up to the nearest multiple of 10,000m3/day) |
> 100,000 | 12 + 1 for each 25,000m3/day of the total volume (rounding up to the nearest multiple of 25,000m3/day) |
5.—(1) When monitoring for a Group A or Group B parameter, a local authority may reduce the sampling frequency in respect of any parameter in Group A or Group B other than E. coli provided that—
(a)the results from samples taken in respect of that parameter collected at regular intervals over a period of at least three years are all at less than 60% of the parametric value;
(b)the results of a risk assessment described in regulation 6(l) are considered, and that risk assessment indicates that no factor can be reasonably anticipated to be likely to cause deterioration of the quality of the water;
(c)data collected in the course of discharging its monitoring obligations under this Part are taken into account; and
(d)at least one sample is taken per year.
(2) A local authority may cease to monitor for a Group A or Group B parameter other than E. coli provided that—
(a)the results from samples taken in respect of that parameter collected at regular intervals over a period of at least three years are all at less than 30% of the parametric value;
(b)the results of a risk assessment described in regulation 6(l) are considered, and that risk assessment indicates that no factor can be reasonably anticipated to be likely to cause deterioration of the quality of the water; and
(c)data collected in the course of discharging its monitoring obligations under this Part are taken into account.
(3) A 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 may monitor anything else identified in the risk assessment.]
Textual Amendments
F7Words in Sch. 2 Pt. 3 heading substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(10)(b)(i) (with reg. 3)
1 The volumes are calculated as averages taken over a calendar year. | ||
Volume1of water produced in bottles or containers each day (m3) | [F8Number of samples to be taken per year when monitoring for a Group A parameter] | [F9Number of samples to be taken per year when monitoring for a Group B parameter] |
---|---|---|
≤10 | 1 | 1 |
>10≤ 60 | 12 | 1 |
>60 | 1 for each 5m3/day of the total volume (rounding up to the nearest multiple of 5m3/day) | 1 for each 100 m3/day of the total volume (rounding up to the nearest multiple of 100 m3/day) |
Textual Amendments
F8Words in Sch. 2 Pt. 3 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(10)(b)(ii)(aa) (with reg. 3)
F9Words in Sch. 2 Pt. 3 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(10)(b)(ii)(bb) (with reg. 3)
Regulation 12
1.—(1) A local authority must secure, so far as reasonably practicable, that when it takes, handles, transports, stores or analyses any sample required to be taken for the purposes of this Schedule, or causes any such sample to be taken, handled, transported, stored or analysed, it complies with the appropriate requirements.
(2) A local authority must secure that a person accredited by the United Kingdom Accreditation Service checks from time to time the local authority’s compliance with the appropriate requirements.
(3) Additionally, when undertaking activity described in sub-paragraph (1) the local authority must demonstrate compliance with the following standards—
(a)as regards any such activity, other than analysing samples, on or after 11th July 2020, European standard EN ISO/IEC 17024 entitled “Conformity Assessment. General requirements for bodies operating certification of persons”, European standard EN ISO/IEC 17025 entitled “General requirements for the competence of testing and calibration laboratories” or other equivalent standards accepted at international level;
(b)as regards the activity of analysing samples, European standard EN ISO/IEC 17025 or another equivalent standard accepted at international level.
(4) In this paragraph, “appropriate requirements” means such of the following as are applicable—
(a)the sample is representative of the quality of the water at the time of sampling;
(b)the person taking the sample is doing so in accordance with a system of quality control to an appropriate standard;
(c)the sample is not contaminated in the course of being taken;
(d)the sample is kept at such a temperature and in such conditions as will secure that there is no material alteration of the concentration or value for the measurement or observation of which the sample is intended;
(e)the sample is analysed whether at the time and place it is taken or as soon as reasonably practicable after it is taken—
(i)by or under the supervision of a person who is competent to perform that task, and
(i)with the use of such equipment as is suitable for the purpose.]
Textual Amendments
F10Sch. 3 Pt. 1 para. 1 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(a) (with reg. 3)
2.—(1) A 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.
F11(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F12(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(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 [F13or uncertainty of measurement] of 1 dilution number at 25°C.
[F14(6) For the parameters set out in Table 3 in Part 2 of this Schedule, the specified performance characteristics are that the method of analysis used must be capable of measuring concentrations equal to the parametric value with a limit of quantification, as defined in Article 2(2) of Commission Directive 2009/90/EC laying down technical specifications for chemical analysis and monitoring of water status, of 30% or less of the relevant parametric value and an uncertainty of measurement as specified in that Table.
(7) The result must be expressed using at least the same number of significant figures as for the parametric value quoted and in the same units laid down in these Regulations.
(8) The uncertainty of measurement laid down in Table 3 in Part 2 of this Schedule must not be used as an additional tolerance to the parametric values set out in Schedule 1.]
Textual Amendments
F11Sch. 3 Pt. 1 para. 2(3) omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(b)(i) (with reg. 3)
F12Sch. 3 Pt. 1 para. 2(4) omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(b)(i) (with reg. 3)
F13Words in Sch. 3 Pt. 1 para. 2(5) inserted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(b)(ii) (with reg. 3)
F14Sch. 3 Pt. 1 para. 2(6)-(8) substituted for Sch. 3 Pt. 1 para. 2(6) (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(b)(iii) (with reg. 3)
3.—(1) The Secretary of State 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 sub-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) | [F15BS-EN ISO 14189] |
Coliform bacteria and [F16E. coli] | BS-EN ISO 9308-1 and BS-EN ISO 9308-2 |
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 |
Pseudomonas aeruginosa | [F17BS-EN ISO 16266] |
Textual Amendments
F15Words in Sch. 3 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(c)(i) (with reg. 3)
F16Words in Sch. 3 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(c)(ii) (with reg. 3)
F17Words in Sch. 3 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(c)(iii) (with reg. 3)
F18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F18Sch. 3 Pt. 2 unnumbered table omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(d)(i) (with reg. 3)
F19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F19Sch. 3 Pt. 2 Table 2 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(d)(ii) (with reg. 3)
Parameters | Uncertainty of measurement % of the parametric value (except for pH) (1) |
---|---|
(1) “Uncertainty of measurement” is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurement, based on the information used. The performance criterion for measurement uncertainty (k = 2) is the percentage of the parametric value stated in the table or better. Measurement uncertainty must be estimated at the level of the parametric value. | |
(2) If the value of uncertainty of measurement cannot be met, the best available technique must be selected (up to 60% of the parametric value). | |
(3) The method determines total cyanide in all forms. | |
(4) Reference method: European standard EN ISO 8467 entitled “Water quality - Determination of permanganate index (ISO 8467:1993). | |
(5) The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30% can be achieved for several pesticides, higher values up to 80% may be allowed for a number of pesticides. | |
(6) The performance characteristics apply to individual substances, specified at 25% of the parametric value in Part 1 of Table B in Part 1 of Schedule 1. | |
(7) The performance characteristics apply to individual substances, specified at 50% of the parametric value in Part 1 of Table B in Part 1 of Schedule 1. | |
(8) The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon (TOC) in accordance with European standard EN 1484 entitled “Water analysis - Guidelines for the determination of total organic carbon and dissolved organic carbon” and dissolved organic carbon (DOC) must be used. | |
(9) The uncertainty of measurement must be estimated at the level of 1.0 nephelometric turbidity units (NTU) in accordance with European standard EN ISO 7027-1 entitled “Water quality - Determination of turbidity - Part 1: Quantitative methods (ISO 7027-1:2016”.] | |
Aluminium | 25 |
Ammonium | 40 |
Antimony | 40 |
Arsenic | 30 |
Benzene | 40 |
Benzo(a)pyrene (2) | 50 |
Boron | 25 |
Bromate | 40 |
Cadmium | 25 |
Chloride | 15 |
Chromium | 30 |
Colour | 20 |
Conductivity | 20 |
Copper | 25 |
Cyanide (3) | 30 |
1,2-dichloroethane | 40 |
Fluoride | 20 |
Hydrogen ion concentration pH (expressed in pH units) | 0.2 |
Iron | 30 |
Lead | 25 |
Manganese | 30 |
Mercury | 30 |
Nickel | 25 |
Nitrate | 15 |
Nitrite | 20 |
Oxidisability (4) | 50 |
Pesticides (5) | 30 |
Polycyclic aromatic hydrocarbons (6) | 50 |
Selenium | 40 |
Sodium | 15 |
Sulphate | 15 |
Tetracloroethene (7) | 30 |
Tetracloromethane | 30 |
Trichloroethene (7) | 40 |
Trihalomethanes: total (6) | 40 |
Total organic carbon (8) | 30 |
Turbidity (9) | 30 |
Textual Amendments
F20Sch. 3 Pt. 2 Table 3 inserted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(e) (with reg. 3)
5.—(1) A local authority may use various reliable screening strategies to indicate the presence of radioactivity in water intended for human consumption.
(2) These strategies may include screening for—
(a)certain radionuclides, or screening for an individual radionuclide;
(b)gross alpha activity or gross beta activity screening.
6.—(1) If one of the activity concentrations exceeds 20% of the corresponding derived value or the tritium concentration exceeds its parametric value specified in the radioactive parameters table, an analysis of additional radionuclides is required.
(2) A local authority must take into account, in deciding which radionuclides are required to be measured for each supply, all relevant information about likely sources of radioactivity.
7.—(1) Subject to paragraph 6(1), the recommended screening values are—
(a)0.1 Bq/l for gross alpha activity, and
(b)1.0 Bq/l for gross beta activity M1.
(2) If the gross alpha activity exceeds 0.1 Bq/l or the gross beta activity exceeds 1.0 Bq/l, analysis for specific radionuclides is required.
(3) The Secretary of State may set alternative screening levels for gross alpha activity and gross beta activity where it is demonstrated by the local authority that the alternative levels are in compliance with an ID of 0,1 mSv.
(4) The determination by the local authority of which radionuclides to measure must be based on all relevant information about likely sources of radioactivity.
Marginal Citations
M1Where appropriate, gross beta activity may be replaced by residual beta activity after subtraction of the K-40 activity concentration.
8.—(1) The ID must be calculated from—
(a)the measured radionuclide concentrations and the dose coefficients [F21referred to as “standard values and relationships” in Article 13, and recommended for the estimation of doses from internal exposure in the definition of “standard values and relationships” in Article 4(96), of Council Directive 2013/59/Euratom laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation, or]
(b)more recent information recognised by the Secretary of State, on the basis of the annual intake of water (730 litres for adults).
(2) Where the following formula is satisfied, it can be assumed that the ID is less than the parametric value of 0,1mSv and no further investigation is required—
Where—
“Ci(obs)” means the observed concentration of radionuclide I;
“Ci(der)” means the derived concentration of radionuclide I;
“n” means the number of radionuclides detected.
1 This Table allows only for the radiological properties of uranium, not for its chemical toxicity. | ||
Origin | Nuclide | Derived concentration |
---|---|---|
Natural | U-2381 | 3,0 Bq/1 |
U-2341 | 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 |
Textual Amendments
F21Words in Sch. 3 Pt. 3 para. 8(1)(a) substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(11)(f) (with reg. 3)
Marginal Citations
M2This 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 litres 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 Secretary of State.
9. For the following parameters and radionuclides, the method of analysis used must, as a minimum, be capable of measuring activity concentrations with a limit of detection specified below—
Parameters and radionuclides | Limit of detection (Notes 1,2) | Notes |
---|---|---|
Tritium | 10 Bq/1 | Note 3 |
Radon | 10 Bq/1 | Note 3 |
gross alpha | 0,04 Bq/1 | Note 4 |
gross beta | 0,4 Bq/1 | Note 4 |
U-238 | 0,02 Bq/1 | |
U-234 | 0,02 Bq/1 | |
Ra-226 | 0,04 Bq/1 | |
Ra-228 | 0,02 Bq/1 | Note 5 |
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 |
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 M3.
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 M4.
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 ID 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.
Marginal Citations
M3A copy may be obtained at www.iso.org or from the Drinking Water Inspectorate, Area 7E, 9 Millbank, c/o Nobel House, 17 Smith Square, London, SW1P 3JR.
M4See previous footnote.
Regulation 14
1.—(1) A local authority must 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, and
(h)the name of the region of Public Health England in whose area the supply is located.
(2) It must review and update the record at least once every 12 months.
(3) It must keep the record for at least 30 years.
2.—(1) For each supply referred to in paragraph 1(1), the local authority must record each of the following within 28 days of the information being available—
(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 Act 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.
[F22(k)a summary of any risk assessment;
(l)a summary of the reasons for a decision to reduce or exempt altogether the monitoring of a particular parameter under regulation 11(10) and (10A).]
(2) It must keep the risk assessment and records of sampling and analysis for at least 30 years, and all other records referred to in this paragraph for at least 5 years.
Textual Amendments
F22Sch. 4 para. 2(1)(k)(l) inserted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(12) (with reg. 3)
Regulation 21
1. A 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 serviceF23....U.K.
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 | F24... | |
---|---|---|
Risk assessment (for each assessment) | F24. . . | |
Sampling (for each visit)1 | F24. . . | |
Investigation (for each investigation) | F24. . . | |
Granting an authorisation (for each authorisation) | F24. . . | |
Analysing a sample— | ||
taken under regulation 10 (for parameters referred to in paragraph (1)(a) to (e) of that regulation) | F24. . . | |
taken during [F25monitoring of Group A parameters] | F24. . . | |
taken during [F26monitoring of Group B parameters] and monitoring under regulation 11 | F24. . . |
Textual Amendments
F23Words in Sch. 5 para. 1 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(13)(a) (with reg. 3)
F24Words in Sch. 5 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(13)(b)(ii) (with reg. 3)
F25Words in Sch. 5 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(13)(b)(i)(aa) (with reg. 3)
F26Words in Sch. 5 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(13)(b)(i)(bb) (with reg. 3)
2.—(1) Any person requesting a local authority to carry out any of the activities specified in the Table in paragraph 1 is liable for the cost.
(2) Otherwise fees are payable, as specified in the invoice, by the relevant person.
(3) Where more than one person is liable for a fee, in determining who is required to make payment, the local authority—
(a)must have regard to any agreement or other document produced to the local authority relating to the terms on which water is supplied, and
(b)may apportion the charge between them.
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