Wastewater: A Lesson | Alternative Drainage

What is wastewater?

It is the excess water or liquid waste that is discharged from municipal sources such as  households, industrial buildings, hospitals, and water treatment plants. It also refers to stormwater, and agricultural wastewater.  Due to the nature of these sources, it is likely that most of the liquid waste coming from them will comprise what is known as sewage.

The source, method of drainage, and destination of the water will determine whether it is effluent, or influent.

Types of Sewage based Wastewater:


Mostly sewage, Blackwater originates from dishwashers, toilet fixtures, excrement chutes, and toilets. The contents of blackwater can be assumed mostly to include urine, faeces and food waste. It is likely to be very pathogenic.


Water originating from non-toilet fixtures such as bathtubs, bathroom sinks, and washing machines is classed as Graywater. Often, Graywater is appropriate for reuse, and takes a different route to Blackwater when disposed of.

Yellow Water:

Specific channels within the sewage system collects yellow water also known as urine. This is kept uncontaminated from Blackwater and Graywater.

Each type of water is managed differently when it reaches the sewers. An efficient system would send each wastewater on a different path, some for cleansing. When there is an issue with the pipes such as a tree root, or items being disposed of incorrectly, problems with the water circulation system can occur.

When issues like this do arise, whether it’s a household issue or a commercial building issue, Alternative Drainage use state of the art equipment to relive and repair the problem to make sure drain systems are working efficiently around the whole of Yorkshire. If you have experienced a problem with your drains, whether it’s a minor issue or a challenging one, give us a call on 0800 980 1362 to see how we can help.