Water quality trading schemes in the United States can predominantly be character- ized by low trading volumes. In this paper we utilize laboratory economics experiments to explore the extent to which the technology through which pollution abatement is achieved in uences market outcomes. Mirroring the majority of water quality trading markets, the sessions utilize small trading groups composed of six participants. To understand the extent to which abatement technology in uences trading behavior, the experimental treatments vary the degree of heterogeneity in initial abatement costs and the potential for long-lived investments in cost-reducing abatement technology.