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NEWS RELEASE NO: 16/2005 DATE OF ISSUE: 4 April 2005
To ensure Singapore's coastal and inland water quality remains good, NEA will be revising the trade effluent standards for discharge into watercourse and controlled watercourse listed under the Environmental Pollution Control (Trade Effluent) Regulations.
The new standards will take effect from 1 May 2005 for new industries and new equipment or processes introduced by existing industries while existing industries will be given a grace period of two years, till 30 April 2007, to ensure the trade effluent discharge from their equipment and processes comply with the revised standards. A copy of the new standards can be found in Annex 1.
As more industries are being set up in Singapore, we need to revise the standards from time to time to ensure that the standards stay relevant and our water quality continues to remain good.
These new standards have been drawn up after extensive consultation with the industries and have taken into account developments in industrial processes and water pollution control technologies.
For enquiries or further information on the Environmental Pollution Control (Trade Effluent) Regulations and the revised trade effluent standards, the public may contact our NEA officers at Tel no: 67319646 and 67319670.
ANNEX 1
New Trade Effluent Standards for Discharge into Watercourse and Controlled Watercourses
| No. |
Parameter |
Watercourse |
Controlled Watercourse |
|
Units in mg/l unless otherwise stated |
| 1 |
Temperature |
45 oC |
45 oC |
| 2 |
Colour |
7 Lovibond |
7 Lovibond |
| 3 |
pH |
6 - 9 |
6 - 9 |
| 4 |
BOD 5 |
50 |
20 |
| 5 |
COD |
100 |
60 |
| 6 |
Total Suspended Solids |
50 |
30 |
| 7 |
Total Dissolved Solids |
- |
1000 |
| 8 |
Chloride (as chloride ion) |
- |
250 |
| 9 |
Sulphate (as SO 4) |
- |
200 |
| 10 |
Sulphide (as sulphur) |
0.2 |
0.2 |
| 11 |
Cyanide (as CN) |
0.1 |
0.1 |
| 12 |
Detergents (linear alkylate sulphonate as methylene blue active substances) |
15 |
5 |
| 13 |
Oil & Grease |
10 (Total) 10 (Hydrocarbons) |
1 (Total) |
| 14 |
Arsenic |
0.1 |
0.01 |
| 15 |
Barium |
2 |
1 |
| 16 |
Tin |
- |
5 |
| 17 |
Iron (as Fe) |
10 |
1 |
| 18 |
Beryllium |
- |
0.5 |
| 19 |
Boron |
5 |
0.5 |
| 20 |
Manganese |
5 |
0.5 |
| 21 |
Phenolic Compounds (as phenol) |
0.2 |
Nil |
| 22 |
*Cadmium |
0.1 |
0.003 |
| 23 |
*Chromium (Trivalent and Hexavalent) |
1 |
0.05 |
| 24 |
*Copper |
0.1 |
0.1 |
| 25 |
*Lead |
0.1 |
0.1 |
| 26 |
*Mercury |
0.05 |
0.001 |
| 27 |
*Nickel |
1 |
0.1 |
| 28 |
*Selenium |
0.5 |
0.01 |
| 29 |
*Silver |
0.1 |
0.1 |
| 30 |
*Zinc |
1 |
0.5 |
| 31 |
*Metals in total |
1 |
0.5 |
| 32 |
Chlorine (Free) |
1 |
1 |
| 33 |
Phosphates (as PO 4) |
5 |
2 |
| 34 |
Calcium |
- |
150 |
| 35 |
Magnesium |
- |
150 |
| 36 |
Nitrate (as NO 3) |
- |
20 |
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