New monitoring data from five nail salons in New York City finds that chemical concentrations in indoor air can spike repeatedly during the workday, reaching levels comparable to those seen at some industrial chemical facilities. The findings highlight that exposure is not constant; instead, short-term peaks occur while workers are actively doing tasks.

Researchers report that these repeated spikes may be missed by approaches that rely on traditional full-shift averages, which can smooth out high-intensity moments into lower mean values. The study, published in the journal Risk Analysis, is focused on how nail salon workers are exposed to potentially harmful chemicals over shorter time intervals.

Across the two outlets, the emphasis is on what the measurement approach reveals. ScienceAlert foregrounds the comparison to chemical plants and the magnitude of peak levels, while Medical Xpress stresses that the monitoring reveals risks that routine assessments may overlook and discusses the implications of peak exposures for worker health.