Water Standard

Topics: Water quality, Water supply, Total suspended solids Pages: 4 (816 words) Published: April 10, 2013

INTRODUCTION

The Ministry of Health established the National Drinking Water Quality Standards (NDWQS) in 1983, with the most recent revision in 2000 due for circulation for use in 2002. The standards stipulate limits for physical, chemical, microbiological and radiological parameters and compliance with these standards is mandatory for all private water suppliers. Supporting documentation is available to ensure effective implementation of the standards and include information on the National Programmed for Drinking Water Quality Surveillance, and the Manual of Drinking Water Quality Surveillance. In addition to the NDWQS the DOE has developed Interim National Water Quality Standards (INWQS) that classifies inland water quality into 5 classes: domestic water supply, fisheries and aquaculture, irrigation, livestock, and recreation, each with its own set of biological, chemical and physical parameters.

INTERIM NATIONAL WATER QUALITY STANDARDS FOR MALAYSIA (INWQS) Parameters| (Units) | Classes|
| | l | llA | llB | lll| lV | V |
Ammonical Nitrogen | mg/l | 0.1| 0.3 | 0.3 | 0.9| 2.7 | > 2 | BOD | mg/l | 1| 3 | 3 | 6| 12 | > 12|
COD | mg/l | 10| 25 | 25 | 50| 100 | > 100| DO | mg/l | 7 | 5 - 7 | 5 - 7 | 3 - 5| < 3 | < 1 | pH | - | 6.5-8.5| 6.5 - 9.5  | 6 - 9 | 5 - 9| 5 - 9 | | Colour | TCU | 15| 150 | 150 | |   | |

Electrical Conductivity | mmhos/cm | 1000| 1000 |  | -| 6000 | -| Floatables | - | N| N | N | -| - | -|
Odour | - | N| N | N | -| - | -|
Salinity | o/oo | 0.5| 1 | - | -| - | -|
Taste | - | N| N | N | -| - | -|
Total Dissolved Solids | mg/l | 500| 1000 | - | -| - | -| Total Suspended Solids | mg/l | 25| 50 | 50 | 150| 300 | > 300| Temperature | oC | -| Normal +2 | -| Normal+2| - | -| Turbidity | NTU | 5| 50 | 50 | -| - | -|

Faecal Caliform* | counts/100ml | 10| 100 | 400 ...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • IFGICT Standards Essay
  • Standards Discipline Lesson Plan Slides Essay
  • Customer Service Standards 2 2 Essay
  • Effect of Volume of Water on Dissolving Speed of Sugar Essay
  • Essay about Water
  • Water and Electrolytes Essay
  • Water Essay
  • Determination of Water Hardness Through the Titration of Standard Solution of Ethylenediamminetetraacetic Acid (Edta) Essay

Become a StudyMode Member

Sign Up - It's Free