Tsigemariam Tesfaye Asefa
Animal Production and Technology
Institute of Land Administration
Assitant Professor at Institute of Land Administration
A wide range of human and natural processes affect the biological, chemical, and physical characteristics of water, and thus impact water quality. Contamination by pathogenic organisms, trace metals, and human-produced and toxic chemicals; the introduction of non-native species; and changes in the acidity, temperature, and salinity of water can all harm aquatic ecosystems and make water unsuitable for human use.Pollution prevention is the reduction or elimination of contaminants at the source before they have a chance to pollute water resources – and it is almost always the cheapest, easiest, and most effective way to protect water quality. Pollution prevention strategies reduce or eliminate the use of hazardous substances, pollutants, and contaminants; modify equipment and technologies so they generate less waste; and reduce fugitive releases and water consumption. Pollution prevention will also require better design of human settlements to improve water infiltration and reduce nonpoint source pollution. As the world takes on the challenge of improving water quality, pollution prevention should be prioritized in international and local efforts.