What type of water is included under the category of diluted streams?

Diluted streams are typically categorized by the presence of water that has been mixed with other waters but retains some level of quality for environmental and treatment considerations. Sanitary wastewater falls under this category because it primarily consists of water that has been used in residential or commercial settings, such as washing, bathing, and toilet use.

When sanitary wastewater enters surface waters, it is often mixed with shorter-term input sources, which can dilute its concentration as it travels through the environment. This dilution occurs naturally over time as it interacts with other water bodies, allowing for the identification of it as a diluted stream.

Understanding the composition of sanitary wastewater is crucial for wastewater management, as it contains organic materials and nutrients that can affect water quality. Therefore, recognizing it as diluted is important for effective treatment processes and maintaining the ecological balance in receiving waters.

The other options represent forms of water that may have different levels of treatment needs or environmental impacts, but they do not specifically align with the characteristics of diluted streams in the same way that sanitary wastewater does.