In the effort to return cleaner water to rivers and communities, cities have long trusted advanced treatment technologies as a final safeguard. Yet a study from researchers in Tianjin reveals a quiet paradox at the heart of that confidence: the same ultraviolet and ozone processes that successfully neutralize certain hormonal pollutants appear to generate new compounds that disrupt androgen signaling beyond established safety thresholds. It is a reminder that in complex chemical systems, the act of purification is never entirely separate from the act of transformation — and that what we cannot
Advanced wastewater treatment may inadvertently boost endocrine-disrupting risks
Potential long-term endocrine disruption risks to human and aquatic populations from treated wastewater discharge and reuse.