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18. For Table A in Part II of Schedule 3 (prescribed concentrations or values of spring water and drinking water) and the note attached to it there shall be substituted the following provisions –
Column 1 | Column 2 | Column 3 | Column 4 |
---|---|---|---|
Item | Parameters | Units of measurement | Concentration or value (maximum unless otherwise stated) |
Note 1: The concentration (mg/l) of nitrate divided by 50 added to the concentration (mg/l) of nitrite divided by 3 must not exceed 1. | |||
Note 2: Excluding tritium, potassium – 40, radon and radon decay products.”. | |||
1. | Colour | mg/l Pt/Co scale | 20 |
2. | Turbidity | NTU | 4 |
3. | Odour | Dilution number | 3 at 25°C |
4. | Taste | Dilution number | 3 at 25°C |
5. | Sulphate | mg SO4/l | 250 |
6. | Sodium | mg Na/l | 200 |
7. | Nitrate | Mg NO3/l | 50 (note 1) |
8. | Nitrite | mg NO2/l | 0.5 (note 1) |
9. | Aluminium | μg Al/l | 200 |
10. | Copper | mg Cu/l | 2 |
11. | Fluoride | mg F/l | 1.5 |
12. | Hydrogen ion concentration | pH units | 6.5 (minimum) 9.5 (maximum) |
13. | Tritium (for radioactivity) | Bq/l | 100 |
14. | Total indicative dose | mSv/year | 0.10 (note 2) |
15. | Manganese | μg Mn/l | 50 |
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