What is greywater?

Greywater refers specifically to domestic wastewater that is generated from non-toilet sources. This includes water from sinks, showers, bathtubs, washing machines, and dishwashers. The distinguishing characteristic of greywater is that it does not include wastewater from toilets, which is classified as blackwater due to the presence of sewage and pathogens.

Option B accurately captures this definition, emphasizing that the wastewater comes from various household activities but excludes the more contaminated toilet waste. Understanding greywater is crucial, especially for septic installers, as it plays an important role in water conservation and proper wastewater treatment systems.

In comparison to the other options, the description that aligns with greywater does not include wastewater from toilets, rainwater collection, or chemically treated wastewater, which are distinct classifications of water types.