Wastewater almost always has a negative context because it's undesirable and implies pollution. Activists raised concerns about the company releasing wastewater into the ocean.
Pro Tip 2/3
Industrial and Domestic
Wastewater can come from both factories and homes, meaning it's not just from one source. The city's wastewater consists of runoff from households and industrial waste.
Pro Tip 3/3
Environmental Impact
The term often includes an implicit concern for environmental health and safety. Proper wastewater treatment is vital for protecting marine life.