Kidney dialysis: ambient formaldehyde levels.

Ambient levels of formaldehyde in kidney dialysis units were discussed. Five kidney dialysis clinics were surveyed and air sampling was performed in all major work areas. Formaldehyde levels were found to be below the TLV of 1.0 part per million (ppm) in all samples and the mean ambient level was below 0.5 ppm. Feasible engineering controls that would further reduce or eliminate potential employee exposures were identified.