IPA: /ˈblækˌwɔːtə/
KK: /ˈblækˌwɔtər/
Waste water that is contaminated and often contains human waste and other harmful substances.
The treatment plant processes blackwater to make it safe for disposal.
Blackwater is formed from "black" (from Old English "blæc", meaning dark or the absence of light) and "water" (from Old English "wæter", meaning water). The term "blackwater" refers to water that is dark in color, often due to the presence of organic matter or pollutants.
Think of 'darkness' ('black') combined with 'water' — this helps you remember that blackwater refers to dark or polluted water.