Schedule 2 INDICATOR PARAMETERSI1I2
Northern Ireland
| Item | Parameters | Specification Concentration or Value (maximum) or State | Units of Measurement | Point of monitoring |
|---|---|---|---|---|
Notes: | ||||
(i) The water should not be aggressive. | ||||
(ii) Excluding tritium, potassium-40, radon and radon decay products. | ||||
* May be monitored from samples of water leaving treatment works or other supply point, as no significant change during distribution. | ||||
| 1. | Ammonium | 0.50 | mgNH4/l | Consumers' taps |
| 2. | Chloride f1 | 250 | mgCl/l | Supply pointf2 |
| 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 | 2500 | μS/cm at 20°C | Supply point |
| 7. | Hydrogen ion | 9.5 | pH value | Consumers' taps |
| 8. | Sulphate | 250 | mgSO4/l | Supply point |
| 9. | Total indicative dose (for radioactivity) f3 | 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 |
Annotations
Commencement
- I1
Sch. 2 in operation at 28.11.2002 for specified purposes, see reg. 1(2)
- I2
Sch. 2 in operation at 25.12.2003 in so far as not already in operation, see reg. 1(4)
Footnotes
- f1
(i)
The water should not be aggressive.
- f2
*
May be monitored from samples of water leaving treatment works or other supply point, as no significant change during distribution.
- f3
(ii)
Excluding tritium, potassium-40, radon and radon decay products.