Waste water may be classified into various types depending on the contents and associated risk.
Term
blackwater
water with urine and/or feces, typically from toilets
greywater
water from washing, typically from sinks and showers/baths
food waste
liquid food waste from food disposal or direct release into a sink
storm runoff
water from streets or roads that goes into a storm drain or storm sewer
industrial waste
water from factories which may contain excess pollutants
where:
• Blackwater waste needs to be distinguished from blackwater in bodies of water. The latter refers to water with a black color, which has a high organic content and very low oxygen content.
Water from a storm sewer is handled separately from waste water although it can contain animal waste and chemicals.
In houses blackwater and greywater may go into the same sewer line for treatment. In mobile homes, ships or other situations they may be kept separate since processing requirements are different.
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