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Changes over time for: SCHEDULE 1
Timeline of Changes
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Version Superseded: 20/11/2017
Status:
Point in time view as at 14/04/2016.
Changes to legislation:
There are outstanding changes not yet made by the legislation.gov.uk editorial team to The Private Water Supplies (Wales) Regulations 2010 (revoked). Any changes that have already been made by the team appear in the content and are referenced with annotations.
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Regulations 4, 10, 15 and 17
SCHEDULE 1E+WConcentrations or Values
PART 1 E+WWholesomeness
TABLE A: MICROBIOLOGICAL PARAMETERS
Prescribed concentrations or values
Parameters | Maximum concentration or value | Units of Measurement |
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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 |
TABLE B:CHEMICAL PARAMETERS
Prescribed concentrations 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.
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2 See also the nitrate-nitrite formula in regulation 4(c).
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3
For these purposes “Pesticides” means:
organic insecticides
organic herbicides
organic fungicides
organic nematocides
organic acaricides
organic algicides
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.
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4 “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process.
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5
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6 The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
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7
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Parameters | Maximum concentration or value | Units of Measurement |
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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— | | |
| 0.030 | μg/l |
| 0.030 | μg/l |
| 0.030 | μg/l |
| 0.030 | μg/l |
| 0.10 | μg/l |
| 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 |
National requirements — Prescribed concentrations or values
Parameters | Maximum concentration or value | Units of Measurement |
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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 |
PART 2 E+WIndicator Parameters
TABLE C
Prescribed concentrations, values or states
1 The water should not be aggressive.
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. . . |
3 Only in the case of surface water or groundwater that has been influenced by surface water.
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Parameters | Maximum concentration or value or state (unless otherwise stated) | Units of measurement |
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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 |
. . . | . . . | . . . |
Total organic carbon (TOC) | No abnormal change | mgC/l |
. . . | . . . | . . . |
Turbidity3 | 1 | NTU |
[PART 3E+WRadioactive substances parameters
TABLE D
Parametric values for radon, tritium and ID of water intended for human consumption
|
|
Parameters | Maximum concentration or value | Units of measurement |
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Indicative dose (for radioactivity) | 0,10 | mSv |
Radon | 100 | Bq/1 |
Tritium (for radioactivity) | 100 | Bq/l |
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