factory Waste from industrial facilities such as factories, dairy products, fish meal factory, flour mill, the plant food. Most organic protein. Carbohydrates present on many organic compounds were emitted to water, it is decomposed into effect. Just as water is released from the community. There may also be associated with other types of toxins depending on the type of plant. Such as mercury from a factory producing sodium hydroxide, which is toxic to aquatic life. And the addition of fish to consume certain types of wastewater. The acid-base conditions The water is changed For example, effluent from paper mills have very high pH wastewater, such as certain types of plants may cause the water temperature changes. This condition is not For the maintenance of the living creatures in the water.