In some remote areas, wastewaters are disposed of by means of land application. In these projects, wastewaters are run onto grasslands and plowed fields or channeled by means of irrigation systems. These areas are often referred to as sewage farms. The use of wastewater for these purposes provides benefit from the water and the fertilizing components of the waste. When using primary effluent, attempts must be made to limit direct contact with crops.
Sewage farms are a rarity in the U.S. b.
In some instances, secondary effluent of high quality can be used for irrigation and spray purposes. The use of water for these purposes is controlled by the effluent standards and disposal criteria established by the state government. The University of Iowa. All rights reserved.