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- Original (As made)
This is the original version (as it was originally made).
Regulations 2 and 4
Item | Parameters | Specification Concentration or Value (maximum) or State | Units of Measurement | Point of monitoring |
---|---|---|---|---|
(*) May be monitored from samples of water leaving treatment works or other supply point, as no significant change during distribution | ||||
Notes: (i) The water should not be aggressive. (ii) Excluding tritium, potassium-40, radon and radon decay products. | ||||
1 | Ammonium | 0.50 | mgNH4/l | Consumers’ taps |
2 | Chloride (i) | 250 | mgCl/l | Supply point(*) |
3 | Clostridium perfringens (including spores) | 0 | Number/100ml | Supply point(*) |
4 | Coliform bacteria | 0 | Number/100ml | Consumers’ taps |
5 | Colony counts | No abnormal change | Number/1ml at 22°C Number/1ml at 37°C | Consumers’ taps, service reservoirs and treatment works |
6 | Conductivity (i) | 2500 | µS/cm at 20°C | Supply point(*) |
7 | Hydrogen ion | 9.5 | pH value | Consumers’ taps |
8 | Sulphate (i) | 250 | mgSO4/l | Supply point(*) |
9 | Total indicative dose (for radioactivity) (ii) | 0.10 | mSv/year | Supply point(*) |
10 | Total organic carbon (TOC) | No abnormal change | mgC/l | Supply point(*) |
11 | Tritium (for radioactivity) | 100 | Bq/l | Supply point(*) |
12 | Turbidity | 1 | NTU | Treatment works |
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