Regulation 2
SCHEDULE 1CRITERIA FOR CLASSIFICATION OF WATERS
The limits set out below are maxima
| No in Annex II to the 1975 Directive | Parameters | DW1 | DW2 | DW3 | |
|---|---|---|---|---|---|
(0) See regulation 7(1)(b) | |||||
* See regulation 7(1)(d) | |||||
| 2 | Colouration (after simple filtration) | mg/1 Pt Scale | 20(0) | 100(0) | 200(0) |
| 4 | Temperature | °C | 25(0) | 25(0) | 25(0) |
| 7* | Nitrates | mg/1 NO3 | 50(0) | 50(0) | 50(0) |
| 8 | Fluorides | mg/1 F | 1.5 | ||
| 10* | Dissolved iron | mg/1 Fe | 0.3 | 2 | |
| 12 | Copper | mg/1 Cu | 0.05(0) | ||
| 13 | Zinc | mg/1 Zn | 3 | 5 | 5 |
| 19 | Arsenic | mg/1 As | 0.05 | 0.05 | 0.1 |
| 20 | Cadmium | mg/1 Cd | 0.005 | 0.005 | 0.005 |
| 21 | Total Chromium | mg/1 Cr | 0.05 | 0.05 | 0.05 |
| 22 | Lead | mg/1 Pb | 0.05 | 0.05 | 0.05 |
| 23 | Selenium | mg/1 Se | 0.01 | 0.01 | 0.01 |
| 24 | Mercury | mg/1 Hg | 0.001 | 0.001 | 0.001 |
| 25 | Barium | mg/1 Ba | 0.1 | 1 | 1 |
| 26 | Cyanide | mg/1 CN | 0.05 | 0.05 | 0.05 |
| 27 | Sulphates | mg/1 SO4 | 250 | 250(0) | 250(0) |
| 31 | Phenols (phenol index) paranitroaniline 4-aminoantipyrine | mg/1 C6H5OH | 0.001 | 0.005 | 0.1 |
| 32 | Dissolved or emulsified hydro carbons (after extraction by petroleum ether) | mg/1 | 0.05 | 0.2 | 1 |
| 33 | Polycyclic aro matic hydrocar bons | mg/1 | 0.0002 | 0.0002 | 0.001 |
| 34 | Total pesticides (parathion, hexachlorocyclohexane, dieldrin) | mg/1 | 0.001 | 0.0025 | 0.005 |
| 39 | Ammonia | mg/1 NH4 | 1.5 | 4(0) | |