User:CyrilThePig4/Sandbox
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The Water Supply Water Quality Regulations 1989 (Statutory Instrument No. 1147)
The regulations were signed jointly by Peter Walker, Secretary of State for Wales and Michael Howard who, as Minister for Water and Planning, was responsible for implementing water privatization in England and Wales during 1988/89.
Schedule 2 of the regulations prescribes maximum concentrations or values for substances that affect wholesomeness.
Phenols μg C6H5OH/l 0.5 Surfactants μg/l (as lauryl sulphate) 200 Aluminium μg Al/l 200 Iron μg Fe/l 200 Manganese μg Mn/l 50 Copper μg Cu/l 3000 Zinc μg Zn/l 5000 Phosphorus μg P/l 2200 Fluoride μg F/l 1500 Silver μg Ag/l 10(ii)
[edit] Wholesomeness
Category:Water pollution Category:Water
| Parameters | Units of Measurement | Value (Max) |
|---|---|---|
| Ammonium (ammonia and ammonium ions) | mg NH4/litre | 0.5 |
| Colour | mg/1 Pt/Co scale | 20 |
| Dissolved or emulsified hydrocarbons (after extraction with petroleum ether); mineral oils | μG/L | 10 |
| Dry residues | mg/l | 1500 dry at 180°C |
| Hydrogen ion | pH value | 9.5 - 5.5(min) |
| Kjeldahl nitrogen | mg N/l | 1 |
| Magnesium | mg Mg/l | 50 |
| Nitrate | mg NO3/litre | 50 |
| Nitrite | mg NO2/litre | 0.1 |
| Odour (including hydrogen sulphide) | Dilution number | 3 at 25°C |
| Oxidizability (permanganate value) | mg O2/litre | 5 |
| Potassium | mg K/l | 12 |
| Sodium | mg Na/l | 150(*) |
| Sulphate | mg SO4/litre | 250 |
| Taste | Dilution number | 3 at 25°C |
| Temperature | °C | 25 |
| Total organic carbon | mg C/l | No higher than normal |
| Turbidity (including suspended solids) | Formazin turbidity units | 4 |
