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The Water Supply (Water Quality) Regulations (Northern Ireland) 2007
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Changes over time for: SCHEDULE 2
Version Superseded: 28/11/2015
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- 01/04/2007- Amendment
- 01/04/2007
Point in time - 28/11/2015- Amendment
- 27/10/2017- Amendment
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The Water Supply (Water Quality) Regulations (Northern Ireland) 2007, SCHEDULE 2 is up to date with all changes known to be in force on or before 14 August 2024. There are changes that may be brought into force at a future date. Changes that have been made appear in the content and are referenced with annotations.
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Regulations 2 and 4
SCHEDULE 2N.I.INDICATOR PARAMETERS
Commencement Information
I1Sch. 2 in operation at 1.4.2007, see reg. 1(1)
| 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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