black water

American  

noun

1. wastewater from toilets, garbage disposal, and industrial processes.

---

black water British  

noun

1. household waste water that cannot be reused without purification Compare grey water

---

Example Sentences

A 2023 report showed that 8,657 outdoor toileting incidents were recorded across the Highlands that year, including 126 times where "black water" toilet waste from campervans had been dumped.

From BBC

The boat’s searchlight swept across the empty black water.

From Literature

When we first encounter Hai, “in the midnight of his childhood and a lifetime from first light,” he perches atop the King Philip’s Bridge, being pelted by rain, “as black water churned like chemically softened granite below.”

From Los Angeles Times

Inky black water surrounds him as a blinding light focuses on his body, making his pale skin glow like a marble statue.

From Salon

Mr Traucki worked with Britton when filming croc horror film Black Water in 2008, as well as its 2019 sequel.

From BBC