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The Private Water Supplies (England) Regulations 2016

Changes over time for: SCHEDULE 1

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Regulations 4, 9 and 11

SCHEDULE 1U.K.Prescribed concentrations or values

This schedule has no associated Explanatory Memorandum

PART 1U.K.Wholesomeness

Table A

MICROBIOLOGICAL PARAMETERS

Prescribed concentrations or values

ParametersMaximum concentration or valueUnits of measurement
[F1E. coli] 0Number/100ml
Enterococci0Number/100ml
In the case of water in bottles or containers:
Colony count 22°C100Number/ml
F2. . .F2. . .F2. . .
[F1E. coli] 0Number/250ml
Enterococci0Number/250ml
Pseudomonas aeruginosa0Number/250ml

Table B

CHEMICAL PARAMETERS

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—

  • — organic acaricides;

  • — organic algicides;

  • — organic fungicide;

  • — organic herbicides;

  • — organic insecticides;

  • — organic nematocides;

  • — organic rodenticides;

  • — organic slimicides;

  • — 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.

4Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process.

5 The specified compounds are—

  • The specified compounds are—

    • — benzo(b)fluoranthene;

    • — benzo(k)fluoranthene;

    • — benzo(ghi)perylene;

    • — indeno(1,2,3-cd)pyrene.

  • The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.

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—

  • The specified compounds are—

    • — bromodichloromethane;

    • — bromoform;

    • — chloroform;

    • — dibromochloromethane

  • The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.

ParametersMaximum concentration or valueUnits of measurement
Acrylamide10.10μg/l
Antimony5.0μg/l
Arsenic10μg/l
Benzene1.0μg/l
Benzo(a)pyrene0.010μg/l
Boron1.0mg/l
Bromate10μg/l
Cadmium5.0μg/l
Chromium50μg/l
Copper2.0mg/l
Cyanide50μg/l
1, 2 dichloroethane3.0μg/l
Epichlorohydrin10.10μg/l
Fluoride1.5mg/l
Lead10μg/l
Mercury1.0μg/l
Nickel20μg/l
Nitrate250mg/l
Nitrite20.5 (or 0.1 in the case of treatment works)mg/l
Pesticides3
Aldrin0.030μg/l
Dieldrin0.030μg/l
Heptachlor0.030μg/l
Heptachlor epoxide0.030μg/l
Other pesticides0.10μg/l
Pesticides total40.50μg/l
Polycyclic aromatic hydrocarbons50.10μg/l
Selenium10μg/l
Tetrachloroethene and Trichloroethene610μg/l
Trihalomethanes: Total7100μg/l
Vinyl chloride10.50μg/l
Part II: National requirements – prescribed concentrations or values
ParametersMaximum concentration or valueUnits of measurement
Aluminium200μg/l
Colour20mg/l Pt/Co
Iron200μg/l
Manganese50μg/l
OdourAcceptable to consumers and no abnormal change
Sodium200mg/l
TasteAcceptable to consumers and no abnormal change
Tetrachloromethane3μg/l
Turbidity4NTU

PART 2U.K.Indicator parameters (excluding radioactive substances)

Table C

Prescribed concentrations, values or states

1 The water should not be aggressive.

2 Only in the case of surface water or groundwater that has been influenced by surface water.

ParametersMaximum concentration or value or state (unless otherwise stated)Units of measurement
Ammonium0.50mg/l
Chloride1250mg/l
Clostridium perfringens (including spores)0Number/100ml
Number/100ml (Number/250
Coliform bacteria0ml in the case of water put into bottles of containers)
F3. . .F4. . .
Colony countsNo abnormal changeNumber/ml at [F522°C]
Conductivity12500μS/cm at 20°C
Hydrogen ion9.5 (maximum)pH value
6.5 (minimum) (in the case of
still water put into bottles or containers the minimum is 4.5)pH value
Sulphate1250mg/l
Total organic carbon (TOC)No abnormal changemgC/l
Turbidity21NTU

PART 3 U.K.Indicator parameters (radioactive substances)

Table D

Parametric values for indicative does, randon and tritium of water intended for human consumption

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.

ParametersMaximum concentration or value or state (unless otherwise stated)Units of measurements
Indicative dose (for radioactivity10.10mSv
Gross alpha0.1Bq/1
Gross beta1.0Bq/1
Radon2100Bq/1
Tritium (for radioactivity)3100Bq/1

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