This paper employs matching techniques to investigate the effects of facility export status on environmental performance. Using facility-level criteria air emission data in the U.S. manufacturing industry, we find the industry-specific effects of export status on emission intensity, measured by emissions per value of sale. In some industries, there is consistent and robust evidence supporting the superior environmental performance of exporters relative to non-exporters in terms of emission intensity for all criteria air pollutants tracked in the paper. In other industries, we find evidence that exporters appear to have higher emission intensity than non-exporters for some pollutants but not all.