Which of the following is NOT a contributor to high strength waste characteristics in the waste stream?

High strength waste characteristics are typically associated with organic materials, certain chemicals, and the way water is utilized in a household or facility. Organics refer to substances like food waste, which contribute significant biological oxygen demand (BOD) and total suspended solids (TSS). Chemicals can also elevate waste strength due to their potential toxicity and impact on treatment processes. Water use practices influence how much water is mixed with waste, affecting the concentration of waste components.

Plant nutrients, while important in wastewater contexts, do not inherently make waste "high strength" in the same way that the other factors do. Nutrients like nitrogen and phosphorus are essential for plant growth and can affect environmental health, particularly water quality in receiving bodies after treatment. However, their contribution does not particularly correlate with the strength of waste characterized by high BOD or TSS. Therefore, labeling plant nutrients as a contributor to high strength waste is not accurate.