Know Your Wastewater

Know Your Wastewater

No one wants to have to deal with a flood in their home, let alone one that includes sewage wastewater. That being said, it’s crucial to be able to differentiate between different types of wastewater.


Blackwater refers to water that is contaminated with human waste – the most dangerous and destructive type. It is typically sourced from

  • Flush toilets
  • Bidets
  • Raw sewage
  • Sinks
  • Dishwashers

It often contains waste such as urine, feces, toilet paper or other harmful matter from disposed of food. Blackwater can contain high amounts of dangerous bacteria and pathogens that need to be fully decomposed before being released into the environment. Dissolved chemicals and particulates can be contaminated in blackwater making contact even more harmful.

Household items like furniture, carpet and drywall cannot be salvaged if contaminated with blackwater. Ingestion or skin contact with blackwater can cause illness in both humans and pets. The water damage professionals at Drain Masters can safely eradicate this form of water and have your home safe and clean again in no time.


Greywater, also knowns as sullage, refers to wastewater that is not contaminated with fecal matter. Greywater comes from

  • Bathtubs
  • Showers
  • Washing machines
  • Dishwashers
  • Sinks

Greywater often contains fewer contaminants than blackwater and can be reused for purposes such as flushing a toilet. It can still contain small amounts of pathogens that can cause illness if ingested. This wastewater is often caused by overflow of a plumbing fixtures or weather events.

If you recognize greywater flooding, begin a cleaning process to avoid further contamination. Wear protective gear, keep children and pets away from the flooded area - this wastewater can affect a weak immune system. If the flood seems extensive, you should call Drain Masters to safely clean and decontaminate the area. Start the cleanup process as soon as possible as greywater can quickly become blackwater if left for a time.

Clean water

This type of wastewater does not pose an immediate health threat. Clearwater floods can be a result of malfunctioning appliances, outdoor precipitation, toilet tanks and more. Clean water is generally safe to clean up yourself but must be handled quickly, it can become greywater as little as two days.

For any questions about water damage or flooding, call the experts at Drain Masters. Remember, the quicker the response, the less extensive the repair. Don’t delay, call today at 314-467-8607 or schedule service online.