Gray Water consists of

(A) Kitchen waste water

(B) Waste water containing fecal matter

(C) Waste water from industrial units

(D) Bathroom waste water

(E) Water from agricultural run-off

Choose the correct answer from the options given below :

Domestic wastewater, or “sewage” can be divided into two categories: blackwater and Grey Water. Blackwater which originates from toilets and kitchens has gross faecal coliform contamination and generally has high concentrations of organic matter

Key Points

• Grey Water
  •  It originates from bathrooms and laundries and constitutes the largest flow of wastewater.
  • The term "greywater" refers to untreated household wastewater, which has not been contaminated by toilet waste. It includes the water from bathtubs, showers, hand basins, laundry tubs, floor wastes and washing machines. It does not include waste from kitchen sinks, garbage disposal units or dishwashers.
  • It is called greywater because if stored for even short periods of time, the water will often cloud and turn grey in colour.
  • The exact sources of greywater vary according to countries and organizations.
  • Some definitions include the water sourced from the kitchen and dishwasher
  • Greywater is the water collected separately from sewage flow that originates from clothes washers, bathtubs, showers and sinks, but it does not include wastewater from kitchen sinks, dishwashers or toilets.
  • Shower, sink, and laundry water comprises 50%–80% of residential wastewater, and if this greywater was to be collected, treated and reused, it would alleviate the demand on water resources and wastewater treatment plants

Therefore we can say that only (A) and (D) are correct