What does the term 'contaminants of emerging concern' (CECs) refer to in wastewater treatment?

The term 'contaminants of emerging concern' (CECs) refers specifically to new pollutants that have been identified as potentially harmful to human health or the environment, even though they are not usually subject to strict regulation. These substances can include pharmaceuticals, personal care products, and various chemicals that might not have been widely recognized as problematic in the past.

The significance of CECs lies in their unpredictable behavior and potential effects on ecosystems and human health. As knowledge about these substances develops, regulatory frameworks may evolve to include them. However, their current status means they don't fall under the existing regulations that govern more traditional pollutants, making ongoing monitoring and research crucial. This distinction highlights the dynamic nature of environmental science, reflecting how our understanding of contaminants affects wastewater management practices.

In contrast, other choices focus on either regulated pollutants, biodegradable substances, or highly controlled industrial discharges, which do not capture the essence of CECs as newly recognized but unregulated risks.